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社区首页 >专栏 >用Java实现JVM第八章《数组和字符串》

用Java实现JVM第八章《数组和字符串》

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小傅哥
修改于 2020-01-20 09:43:36
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修改于 2020-01-20 09:43:36
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文章被收录于专栏：CodeGuide | 程序员编码指南CodeGuide | 程序员编码指南

小傅哥 | https://bugstack.cn 沉淀、分享、成长，专注于原创专题案例，以最易学习编程的方式分享知识，让自己和他人都能有所收获。目前已完成的专题有；Netty4.x实战专题案例、用Java实现JVM、基于JavaAgent的全链路监控、手写RPC框架、架构设计专题案例、源码分析等。 你用剑🗡、我用刀🔪，好的代码都很烧，望你不吝出招！

一、案例介绍

本章主要介绍如何实现让虚拟机处理数组和字符串，在虚拟机功能增强后，我们可以执行数组类型计算和输出字符串。本章需要新增实现数组指令；newarray、anewarray、arraylength、<t>aload、<t>astore、multianewarray、ldc，同时需要需要开发字符串池方法等。

数组在Java虚拟机中是给比较特殊的概念，主要有以下原因； 首先，数组类和普通的类是不同的。普通的类从class文件中加载，但是数组类由Java虚拟机在运行时生成。数组的类名是左括号([)+数组元素的类型描述符；数组的类型描述符就是类名本身。例如，int[]的类名是[I，int的类名是[[I，Object[]的类名是[Ljava/lang/Object;，String的类名是[[java/lang/String;，等等。 其次，创建数组的方式和创建普通对象的方式不同。普通对象new指令创建，然后由构造函数初始化。基本类型数组由newarray指令创建；引用类型数组由anewarray指令创建；另外还有一个专门的mulitianewarray指令用于创建多维数组。 最后，很显然，数组和普通对象存在的数据也是不同的。普通对象中存放的是实例变量，通过putfield和getfield指令存取。数组对象中存放的则是数组元素，通过<t>aload和<t>astore系列指令按索引存取。其中<t>可以是a、b、c、d、f、i、l或者s，分别用于存取引用、byte、char、double、float、int、long或者shore类型的数组。另外，还有一个arraylength指令，用于获取数组长度。

二、环境准备

  1. jdk 1.8.0
  2. IntelliJ IDEA Community Edition 2018.3.1 x64

三、配置信息

  1. 调试配置
代码语言：txt
复制
1. 配置位置：Run/Debug Configurations -> program arguments
代码语言：txt
复制
2. 配置内容（执行数组计算）：-Xjre "C:\Program Files\Java\jdk1.8.0\_161\jre" E:\itstack\git\istack-demo\itstack-demo-jvm\itstack-demo-jvm-08\target\test-classes\org\itstack\demo\test\BubbleSortTest
代码语言：txt
复制
3. 配置内容（字符串的输出）：-Xjre "C:\Program Files\Java\jdk1.8.0\_161\jre" E:\itstack\git\istack-demo\itstack-demo-jvm\itstack-demo-jvm-08\target\test-classes\org\itstack\demo\test\HelloWorld -verbose true -args 你好，java版虚拟机v1.0，欢迎你的到来。

四、代码示例

代码语言：txt
复制
itstack-demo-jvm-08

├── pom.xml

└── src

    └── main

    │    └── java

    │        └── org.itstack.demo.jvm

    │             ├── classfile

    │             │   ├── attributes   {BootstrapMethods/Code/ConstantValue...}

    │             │   ├── constantpool {CONSTANT\_TAG\_CLASS/CONSTANT\_TAG\_FIELDREF/CONSTANT\_TAG\_METHODREF...}

    │             │   ├── ClassFile.java

    │             │   ├── ClassReader.java

    │             │   └── MemberInfo.java   

    │             ├── classpath

    │             │   ├── impl

    │             │   │   ├── CompositeEntry.java

    │             │   │   ├── DirEntry.java 

    │             │   │   ├── WildcardEntry.java 

    │             │   │   └── ZipEntry.java    

    │             │   ├── Classpath.java

    │             │   └── Entry.java   

    │             ├── classpath

    │             │   ├── base

    │             │   │   ├── BytecodeReader.java

    │             │   │   ├── ClassInitLogic.java

    │             │   │   ├── Instruction.java

    │             │   │   ├── InstructionBranch.java

    │             │   │   ├── InstructionIndex8.java

    │             │   │   ├── InstructionIndex16.java

    │             │   │   ├── InstructionNoOperands.java    

    │             │   │   └── MethodInvokeLogic.java

    │             │   ├── comparisons

    │             │   ├── constants

    │             │   ├── control

    │             │   ├── conversions

    │             │   ├── extended

    │             │   ├── loads

    │             │   ├── math

    │             │   ├── references

    │             │   │   ├── ANEW\_ARRAY.java

    │             │   │   ├── ARRAY\_LENGTH.java

    │             │   │   ├── CHECK\_CAST.java

    │             │   │   ├── GET\_FIELD.java

    │             │   │   ├── GET\_STATIC.java

    │             │   │   ├── INSTANCE\_OF.java

    │             │   │   ├── INVOKE\_INTERFACE.java

    │             │   │   ├── INVOKE\_SPECIAL.java

    │             │   │   ├── INVOKE\_STATIC.java

    │             │   │   ├── INVOKE\_VIRTUAL.java

    │             │   │   ├── MULTI\_ANEW\_ARRAY.java

    │             │   │   ├── NEW.java

    │             │   │   ├── NEW\_ARRAY.java

    │             │   │   ├── PUT\_FIELD.java

    │             │   │   └── PUT\_STATIC.java

    │             │   ├── stack

    │             │   ├── store

    │             │   │   └── xastore

    │             │   │       ├── AASTORE.java    

    │             │   │       ├── BASTORE.java    

    │             │   │       ├── CASTORE.java    

    │             │   │       ├── DASTORE.java

    │             │   │       ├── FASTORE.java

    │             │   │       ├── IASTORE.java

    │             │   │       ├── LASTORE.java    

    │             │   │       └── SASTORE.java        

    │             │   └── Factory   

    │             ├── rtda

    │             │   ├── heap

    │             │   │   ├── constantpool

    │             │   │   ├── methodarea

    │             │   │   │   ├── Class.java    

    │             │   │   │   ├── ClassMember.java  

    │             │   │   │   ├── Field.java    

    │             │   │   │   ├── Method.java 

    │             │   │   │   ├── MethodDescriptor.java 

    │             │   │   │   ├── MethodDescriptorParser.java 

    │             │   │   │   ├── MethodLookup.java     

    │             │   │   │   ├── Object.java   

    │             │   │   │   ├── Slots.java   

    │             │   │   │   └── StringPool.java    

    │             │   │   └── ClassLoader.java  

    │             │   ├── Frame.java

    │             │   ├── JvmStack.java

    │             │   ├── LocalVars.java

    │             │   ├── OperandStack.java

    │             │   ├── Slot.java 

    │             │   └── Thread.java

    │             ├── Cmd.java

    │             ├── Interpret.java    

    │             └── Main.java

    └── test

         └── java

             └── org.itstack.demo.test

                 ├── BubbleSortTest.java

                 └── HelloWorld.java

代码片段

ANEW_ARRAY.java

代码语言：txt
复制
package org.itstack.demo.jvm.instructions.references;



import org.itstack.demo.jvm.instructions.base.InstructionIndex16;

import org.itstack.demo.jvm.rtda.Frame;

import org.itstack.demo.jvm.rtda.OperandStack;

import org.itstack.demo.jvm.rtda.heap.constantpool.ClassRef;

import org.itstack.demo.jvm.rtda.heap.constantpool.RunTimeConstantPool;

import org.itstack.demo.jvm.rtda.heap.methodarea.Class;

import org.itstack.demo.jvm.rtda.heap.methodarea.Object;



/\*\*

 \* https://bugstack.cn/

 \* create by fuzhengwei on 2019/4/29

 \* create new array of reference

 \*/

public class ANEW\_ARRAY extends InstructionIndex16 {



    @Override

    public void execute(Frame frame) {

        

        RunTimeConstantPool runTimeConstantPool = frame.method().clazz().constantPool();

        ClassRef classRef = (ClassRef) runTimeConstantPool.getConstants(this.idx);

        Class componentClass = classRef.resolvedClass();



        OperandStack stack = frame.operandStack();

        int count = stack.popInt();

        if (count < 0) {

            throw new NegativeArraySizeException();

        }



        Class arrClass = componentClass.arrayClass();

        Object arr = arrClass.newArray(count);

        stack.pushRef(arr);



    }



}

ARRAY_LENGTH.java

代码语言：txt
复制
package org.itstack.demo.jvm.instructions.references;



import org.itstack.demo.jvm.instructions.base.InstructionNoOperands;

import org.itstack.demo.jvm.rtda.Frame;

import org.itstack.demo.jvm.rtda.OperandStack;

import org.itstack.demo.jvm.rtda.heap.methodarea.Object;



/\*\*

 \* https://bugstack.cn/

 \* create by fuzhengwei on 2019/4/29

 \* get length of array

 \*/

public class ARRAY\_LENGTH extends InstructionNoOperands {



    @Override

    public void execute(Frame frame) {



        OperandStack stack = frame.operandStack();

        Object arrRef = stack.popRef();

        if (null == arrRef){

            throw new NullPointerException();

        }



        int arrLen = arrRef.arrayLength();

        stack.pushInt(arrLen);

    }



}

NEW_ARRAY.java

代码语言：txt
复制
package org.itstack.demo.jvm.instructions.references;



import org.itstack.demo.jvm.instructions.base.BytecodeReader;

import org.itstack.demo.jvm.instructions.base.Instruction;

import org.itstack.demo.jvm.rtda.Frame;

import org.itstack.demo.jvm.rtda.OperandStack;

import org.itstack.demo.jvm.rtda.heap.ClassLoader;

import org.itstack.demo.jvm.rtda.heap.methodarea.Class;

import org.itstack.demo.jvm.rtda.heap.methodarea.Object;



/\*\*

 \* https://bugstack.cn/

 \* create by fuzhengwei on 2019/4/29

 \*/

public class NEW\_ARRAY implements Instruction {



    private byte atype;



    @Override

    public void fetchOperands(BytecodeReader reader) {

        this.atype = reader.readByte();

    }



    @Override

    public void execute(Frame frame) {

        OperandStack stack = frame.operandStack();

        int count = stack.popInt();

        if (count < 0) {

            throw new NegativeArraySizeException();

        }



        ClassLoader classLoader = frame.method().clazz().loader();

        Class arrClass = getPrimitiveArrayClass(classLoader, this.atype);

        Object arr = arrClass.newArray(count);

        stack.pushRef(arr);



    }



    private Class getPrimitiveArrayClass(ClassLoader loader, byte atype){

        switch (atype) {

            case ArrayType.AT\_BOOLEAN:

                return loader.loadClass("[Z");

            case ArrayType.AT\_BYTE:

                return loader.loadClass("[B");

            case ArrayType.AT\_CHAR:

                return loader.loadClass("[C");

            case ArrayType.AT\_SHORT:

                return loader.loadClass("[S");

            case ArrayType.AT\_INT:

                return loader.loadClass("[I");

            case ArrayType.AT\_LONG:

                return loader.loadClass("[J");

            case ArrayType.AT\_FLOAT:

                return loader.loadClass("[F");

            case ArrayType.AT\_DOUBLE:

                return loader.loadClass("[D");

            default:

                throw new RuntimeException("Invalid atype!");

        }

    }



    static class ArrayType {

        static final byte AT\_BOOLEAN = 4;

        static final byte AT\_CHAR = 5;

        static final byte AT\_FLOAT = 6;

        static final byte AT\_DOUBLE = 7;

        static final byte AT\_BYTE = 8;

        static final byte AT\_SHORT = 9;

        static final byte AT\_INT = 10;

        static final byte AT\_LONG = 11;

    }



}

IASTORE.java

代码语言：txt
复制
package org.itstack.demo.jvm.instructions.stores.xastore;



import org.itstack.demo.jvm.instructions.base.InstructionNoOperands;

import org.itstack.demo.jvm.rtda.Frame;

import org.itstack.demo.jvm.rtda.OperandStack;

import org.itstack.demo.jvm.rtda.heap.methodarea.Object;



/\*\*

 \* https://bugstack.cn/

 \* create by fuzhengwei on 2019/4/29

 \*/

public class IASTORE extends InstructionNoOperands {



    @Override

    public void execute(Frame frame) {

        OperandStack stack = frame.operandStack();

        int val = stack.popInt();

        int idx = stack.popInt();

        Object arrRef = stack.popRef();



        checkNotNull(arrRef);

        int[] ints = arrRef.ints();

        checkIndex(ints.length, idx);

        ints[idx] = val;



    }



}

StringPool.java

代码语言：txt
复制
package org.itstack.demo.jvm.rtda.heap.methodarea;



import org.itstack.demo.jvm.rtda.heap.ClassLoader;



import java.util.HashMap;

import java.util.Map;



/\*\*

 \* https://bugstack.cn/

 \* create by fuzhengwei on 2019/4/29

 \*/

public class StringPool {



    private static Map<String, Object> internedStrs = new HashMap<>();



    public static Object jString(ClassLoader loader, String goStr) {

        Object internedStr = internedStrs.get(goStr);

        if (null != internedStr) return internedStr;



        char[] chars = goStr.toCharArray();

        Object jChars = new Object(loader.loadClass("[C"), chars);

        

        Object jStr = loader.loadClass("java/lang/String").newObject();

        jStr.setRefVal("value", "[C", jChars);



        internedStrs.put(goStr, jStr);

        return jStr;

    }



    public static String goString(Object jStr) {

        Object charArr = jStr.getRefVar("value", "[C");

        return new String(charArr.chars());

    }



}

Interpret.java

代码语言：txt
复制
package org.itstack.demo.jvm;



import com.alibaba.fastjson.JSON;

import org.itstack.demo.jvm.instructions.Factory;

import org.itstack.demo.jvm.instructions.base.BytecodeReader;

import org.itstack.demo.jvm.instructions.base.Instruction;

import org.itstack.demo.jvm.rtda.Frame;

import org.itstack.demo.jvm.rtda.Thread;

import org.itstack.demo.jvm.rtda.heap.ClassLoader;

import org.itstack.demo.jvm.rtda.heap.methodarea.\*;

import org.itstack.demo.jvm.rtda.heap.methodarea.Class;

import org.itstack.demo.jvm.rtda.heap.methodarea.Object;





//指令集解释器

class Interpret {



    Interpret(Method method, boolean logInst, String args) {

        Thread thread = new Thread();

        Frame frame = thread.newFrame(method);

        thread.pushFrame(frame);



        if (null != args){

            Object jArgs = createArgsArray(method.clazz().loader(), args.split(" "));

            frame.localVars().setRef(0, jArgs);

        }



        loop(thread, logInst);

    }



    private Object createArgsArray(ClassLoader loader, String[] args) {

        Class stringClass = loader.loadClass("java/lang/String");

        Object argsArr = stringClass.arrayClass().newArray(args.length);

        Object[] jArgs = argsArr.refs();

        for (int i = 0; i < jArgs.length; i++) {

            jArgs[i] = StringPool.jString(loader, args[i]);

        }

        return argsArr;

    }



    private void loop(Thread thread, boolean logInst) {

        BytecodeReader reader = new BytecodeReader();

        while (true) {

            Frame frame = thread.currentFrame();

            int pc = frame.nextPC();

            thread.setPC(pc);



            reader.reset(frame.method().code, pc);

            byte opcode = reader.readByte();

            Instruction inst = Factory.newInstruction(opcode);

            if (null == inst) {

                System.out.println("Unsupported opcode " + byteToHexString(new byte[]{opcode}));

                break;

            }

            inst.fetchOperands(reader);

            frame.setNextPC(reader.pc());



            if (logInst) {

                logInstruction(frame, inst, opcode);

            }



            //exec

            inst.execute(frame);



            if (thread.isStackEmpty()) {

                break;

            }

        }

    }



    private static void logInstruction(Frame frame, Instruction inst, byte opcode) {

        Method method = frame.method();

        String className = method.clazz().name();

        String methodName = method.name();

        String outStr = (className + "." + methodName + "() \t") +

                "寄存器(指令)：" + byteToHexString(new byte[]{opcode}) + " -> " + inst.getClass().getSimpleName() + " => 局部变量表：" + JSON.toJSONString(frame.operandStack().getSlots()) + " 操作数栈：" + JSON.toJSONString(frame.operandStack().getSlots());

        System.out.println(outStr);

    }



    private static String byteToHexString(byte[] codes) {

        StringBuilder sb = new StringBuilder();

        sb.append("0x");

        for (byte b : codes) {

            int value = b & 0xFF;

            String strHex = Integer.toHexString(value);

            if (strHex.length() < 2) {

                strHex = "0" + strHex;

            }

            sb.append(strHex);

        }

        return sb.toString();

    }



}

BubbleSortTest.java

代码语言：txt
复制
package org.itstack.demo.test;



/\*\*

 \* -Xjre "C:\Program Files\Java\jdk1.8.0\_161\jre" E:\itstack\git\istack-demo\itstack-demo-jvm\itstack-demo-jvm-08\target\test-classes\org\itstack\demo\test\BubbleSortTest -verbose true

 \*/

public class BubbleSortTest {

    

    public static void main(String[] args) {

        int[] arr = {

            22, 84, 77, 11, 95,  9, 78, 56, 

            36, 97, 65, 36, 10, 24 ,92, 48

        };



        //printArray(arr);

        bubbleSort(arr);

        //System.out.println(123456789);

        printArray(arr);

    }

    

    private static void bubbleSort(int[] arr) {

        boolean swapped = true;

        int j = 0;

        int tmp;

        while (swapped) {

            swapped = false;

            j++;

            for (int i = 0; i < arr.length - j; i++) {

                if (arr[i] > arr[i + 1]) {

                    tmp = arr[i];

                    arr[i] = arr[i + 1];

                    arr[i + 1] = tmp;

                    swapped = true;

                }

            }

        }

    }

    

    private static void printArray(int[] arr) {

        for (int i : arr) {

            System.out.println(i);

        }

    }

    

}

HelloWorld.java

代码语言：txt
复制
package org.itstack.demo.test;



/\*\*

 \* -Xjre "C:\Program Files\Java\jdk1.8.0\_161\jre" E:\itstack\git\istack-demo\itstack-demo-jvm\itstack-demo-jvm-08\target\test-classes\org\itstack\demo\test\HelloWorld -verbose true -args 你好，java版虚拟机v1.0，欢迎你的到来。

 \*/

public class HelloWorld {



    public static void main(String[] args) {

        for (String str : args) {

            System.out.println(str);

        }

    }



}

五、测试结果

分为测试数组、输出字符串；

1. 测试结果一；执行数组

代码语言：txt
复制
-Xjre "C:\Program Files\Java\jdk1.8.0\_161\jre" E:\itstack\git\istack-demo\itstack-demo-jvm\itstack-demo-jvm-08\target\test-classes\org\itstack\demo\test\BubbleSortTest -verbose true

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":0},{"num":0},{"num":0},{"num":0}] 操作数栈：[{"num":0},{"num":0},{"num":0},{"num":0}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0xbc -> NEW\_ARRAY => 局部变量表：[{"num":16},{"num":0},{"num":0},{"num":0}] 操作数栈：[{"num":16},{"num":0},{"num":0},{"num":0}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x59 -> DUP => 局部变量表：[{"num":16,"ref":{}},{"num":0},{"num":0},{"num":0}] 操作数栈：[{"num":16,"ref":{}},{"num":0},{"num":0},{"num":0}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x03 -> ICONST\_0 => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":0},{"num":0}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":0},{"num":0}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":0},{"num":0}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":0},{"num":0}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x4f -> IASTORE => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":0},{"num":22}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":0},{"num":22}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x59 -> DUP => 局部变量表：[{"num":16,"ref":{}},{"num":16},{"num":0},{"num":22}] 操作数栈：[{"num":16,"ref":{}},{"num":16},{"num":0},{"num":22}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x04 -> ICONST\_1 => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":0},{"num":22}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":0},{"num":22}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":1},{"num":22}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":1},{"num":22}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x4f -> IASTORE => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":1},{"num":84}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":1},{"num":84}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x59 -> DUP => 局部变量表：[{"num":16,"ref":{}},{"num":16},{"num":1},{"num":84}] 操作数栈：[{"num":16,"ref":{}},{"num":16},{"num":1},{"num":84}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x05 -> ICONST\_2 => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":1},{"num":84}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":1},{"num":84}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":2},{"num":84}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":2},{"num":84}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x4f -> IASTORE => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":2},{"num":77}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":2},{"num":77}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x59 -> DUP => 局部变量表：[{"num":16,"ref":{}},{"num":16},{"num":2},{"num":77}] 操作数栈：[{"num":16,"ref":{}},{"num":16},{"num":2},{"num":77}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x06 -> ICONST\_3 => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":2},{"num":77}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":2},{"num":77}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":3},{"num":77}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":3},{"num":77}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x4f -> IASTORE => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":3},{"num":11}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":3},{"num":11}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x59 -> DUP => 局部变量表：[{"num":16,"ref":{}},{"num":16},{"num":3},{"num":11}] 操作数栈：[{"num":16,"ref":{}},{"num":16},{"num":3},{"num":11}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x07 -> ICONST\_4 => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":3},{"num":11}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":3},{"num":11}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":4},{"num":11}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":4},{"num":11}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x4f -> IASTORE => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":4},{"num":95}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":4},{"num":95}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x59 -> DUP => 局部变量表：[{"num":16,"ref":{}},{"num":16},{"num":4},{"num":95}] 操作数栈：[{"num":16,"ref":{}},{"num":16},{"num":4},{"num":95}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x08 -> ICONST\_5 => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":4},{"num":95}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":4},{"num":95}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":5},{"num":95}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":5},{"num":95}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x4f -> IASTORE => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":5},{"num":9}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":5},{"num":9}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x59 -> DUP => 局部变量表：[{"num":16,"ref":{}},{"num":16},{"num":5},{"num":9}] 操作数栈：[{"num":16,"ref":{}},{"num":16},{"num":5},{"num":9}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":5},{"num":9}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":5},{"num":9}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":6},{"num":9}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":6},{"num":9}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x4f -> IASTORE => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":6},{"num":78}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":6},{"num":78}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x59 -> DUP => 局部变量表：[{"num":16,"ref":{}},{"num":16},{"num":6},{"num":78}] 操作数栈：[{"num":16,"ref":{}},{"num":16},{"num":6},{"num":78}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":6},{"num":78}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":6},{"num":78}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":7},{"num":78}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":7},{"num":78}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x4f -> IASTORE => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":7},{"num":56}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":7},{"num":56}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x59 -> DUP => 局部变量表：[{"num":16,"ref":{}},{"num":16},{"num":7},{"num":56}] 操作数栈：[{"num":16,"ref":{}},{"num":16},{"num":7},{"num":56}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":7},{"num":56}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":7},{"num":56}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":8},{"num":56}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":8},{"num":56}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x4f -> IASTORE => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":8},{"num":36}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":8},{"num":36}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x59 -> DUP => 局部变量表：[{"num":16,"ref":{}},{"num":16},{"num":8},{"num":36}] 操作数栈：[{"num":16,"ref":{}},{"num":16},{"num":8},{"num":36}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":8},{"num":36}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":8},{"num":36}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":9},{"num":36}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":9},{"num":36}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x4f -> IASTORE => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":9},{"num":97}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":9},{"num":97}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x59 -> DUP => 局部变量表：[{"num":16,"ref":{}},{"num":16},{"num":9},{"num":97}] 操作数栈：[{"num":16,"ref":{}},{"num":16},{"num":9},{"num":97}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":9},{"num":97}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":9},{"num":97}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":10},{"num":97}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":10},{"num":97}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x4f -> IASTORE => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":10},{"num":65}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":10},{"num":65}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x59 -> DUP => 局部变量表：[{"num":16,"ref":{}},{"num":16},{"num":10},{"num":65}] 操作数栈：[{"num":16,"ref":{}},{"num":16},{"num":10},{"num":65}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":10},{"num":65}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":10},{"num":65}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":11},{"num":65}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":11},{"num":65}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x4f -> IASTORE => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":11},{"num":36}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":11},{"num":36}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x59 -> DUP => 局部变量表：[{"num":16,"ref":{}},{"num":16},{"num":11},{"num":36}] 操作数栈：[{"num":16,"ref":{}},{"num":16},{"num":11},{"num":36}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":11},{"num":36}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":11},{"num":36}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":12},{"num":36}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":12},{"num":36}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x4f -> IASTORE => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":12},{"num":10}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":12},{"num":10}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x59 -> DUP => 局部变量表：[{"num":16,"ref":{}},{"num":16},{"num":12},{"num":10}] 操作数栈：[{"num":16,"ref":{}},{"num":16},{"num":12},{"num":10}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":12},{"num":10}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":12},{"num":10}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":13},{"num":10}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":13},{"num":10}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x4f -> IASTORE => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":13},{"num":24}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":13},{"num":24}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x59 -> DUP => 局部变量表：[{"num":16,"ref":{}},{"num":16},{"num":13},{"num":24}] 操作数栈：[{"num":16,"ref":{}},{"num":16},{"num":13},{"num":24}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":13},{"num":24}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":13},{"num":24}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":14},{"num":24}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":14},{"num":24}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x4f -> IASTORE => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":14},{"num":92}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":14},{"num":92}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x59 -> DUP => 局部变量表：[{"num":16,"ref":{}},{"num":16},{"num":14},{"num":92}] 操作数栈：[{"num":16,"ref":{}},{"num":16},{"num":14},{"num":92}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":14},{"num":92}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":14},{"num":92}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x10 -> BIPUSH => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":15},{"num":92}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":15},{"num":92}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x4f -> IASTORE => 局部变量表：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":15},{"num":48}] 操作数栈：[{"num":16,"ref":{}},{"num":16,"ref":{"$ref":"$[0].ref"}},{"num":15},{"num":48}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x4c -> ASTORE\_1 => 局部变量表：[{"num":16,"ref":{}},{"num":16},{"num":15},{"num":48}] 操作数栈：[{"num":16,"ref":{}},{"num":16},{"num":15},{"num":48}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0x2b -> ALOAD\_1 => 局部变量表：[{"num":16},{"num":16},{"num":15},{"num":48}] 操作数栈：[{"num":16},{"num":16},{"num":15},{"num":48}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0xb8 -> INVOKE\_STATIC => 局部变量表：[{"num":16,"ref":{}},{"num":16},{"num":15},{"num":48}] 操作数栈：[{"num":16,"ref":{}},{"num":16},{"num":15},{"num":48}]

java/lang/Object.<clinit>()     寄存器(指令)：0xb8 -> INVOKE\_STATIC => 局部变量表：null 操作数栈：null

java/lang/Object.<clinit>()     寄存器(指令)：0xb1 -> RETURN => 局部变量表：null 操作数栈：null

... ...

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0xb2 -> GET\_STATIC => 局部变量表：[{"num":9},{"num":0}] 操作数栈：[{"num":9},{"num":0}]

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0x15 -> ILOAD => 局部变量表：[{"num":9},{"num":0}] 操作数栈：[{"num":9},{"num":0}]

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0xb6 -> INVOKE\_VIRTUAL => 局部变量表：[{"num":9},{"num":9}] 操作数栈：[{"num":9},{"num":9}]

9

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0x84 -> IINC => 局部变量表：[{"num":9},{"num":9}] 操作数栈：[{"num":9},{"num":9}]

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0xa7 -> GOTO => 局部变量表：[{"num":9},{"num":9}] 操作数栈：[{"num":9},{"num":9}]

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0x1d -> ILOAD\_3 => 局部变量表：[{"num":9},{"num":9}] 操作数栈：[{"num":9},{"num":9}]

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0x1c -> ILOAD\_2 => 局部变量表：[{"num":1},{"num":9}] 操作数栈：[{"num":1},{"num":9}]

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0xa2 -> IF\_ICMPGE => 局部变量表：[{"num":1},{"num":16}] 操作数栈：[{"num":1},{"num":16}]

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0x2b -> ALOAD\_1 => 局部变量表：[{"num":1},{"num":16}] 操作数栈：[{"num":1},{"num":16}]

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0x1d -> ILOAD\_3 => 局部变量表：[{"num":1,"ref":{}},{"num":16}] 操作数栈：[{"num":1,"ref":{}},{"num":16}]

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0x2e -> IALOAD => 局部变量表：[{"num":1,"ref":{}},{"num":1}] 操作数栈：[{"num":1,"ref":{}},{"num":1}]

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0x36 -> ISTORE => 局部变量表：[{"num":10},{"num":1}] 操作数栈：[{"num":10},{"num":1}]

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0xb2 -> GET\_STATIC => 局部变量表：[{"num":10},{"num":1}] 操作数栈：[{"num":10},{"num":1}]

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0x15 -> ILOAD => 局部变量表：[{"num":10},{"num":1}] 操作数栈：[{"num":10},{"num":1}]

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0xb6 -> INVOKE\_VIRTUAL => 局部变量表：[{"num":10},{"num":10}] 操作数栈：[{"num":10},{"num":10}]

10

11

22

24

36

36

48

56

65

77

78

84

92

95

97

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0x84 -> IINC => 局部变量表：[{"num":97},{"num":97}] 操作数栈：[{"num":97},{"num":97}]

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0xa7 -> GOTO => 局部变量表：[{"num":97},{"num":97}] 操作数栈：[{"num":97},{"num":97}]

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0x1d -> ILOAD\_3 => 局部变量表：[{"num":97},{"num":97}] 操作数栈：[{"num":97},{"num":97}]

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0x1c -> ILOAD\_2 => 局部变量表：[{"num":16},{"num":97}] 操作数栈：[{"num":16},{"num":97}]

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0xa2 -> IF\_ICMPGE => 局部变量表：[{"num":16},{"num":16}] 操作数栈：[{"num":16},{"num":16}]

org/itstack/demo/test/BubbleSortTest.printArray()     寄存器(指令)：0xb1 -> RETURN => 局部变量表：[{"num":16},{"num":16}] 操作数栈：[{"num":16},{"num":16}]

org/itstack/demo/test/BubbleSortTest.main()     寄存器(指令)：0xb1 -> RETURN => 局部变量表：[{"num":16,"ref":{}},{"num":16},{"num":15},{"num":48}] 操作数栈：[{"num":16,"ref":{}},{"num":16},{"num":15},{"num":48}]



Process finished with exit code 0

2. 测试结果二；输出字符

代码语言：txt
复制
org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0x2a -> ALOAD\_0 => 局部变量表：[{"num":0},{"num":0}] 操作数栈：[{"num":0},{"num":0}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0x4c -> ASTORE\_1 => 局部变量表：[{"num":0,"ref":{}},{"num":0}] 操作数栈：[{"num":0,"ref":{}},{"num":0}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0x2b -> ALOAD\_1 => 局部变量表：[{"num":0},{"num":0}] 操作数栈：[{"num":0},{"num":0}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0xbe -> ARRAY\_LENGTH => 局部变量表：[{"num":0,"ref":{}},{"num":0}] 操作数栈：[{"num":0,"ref":{}},{"num":0}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0x3d -> ISTORE\_2 => 局部变量表：[{"num":1},{"num":0}] 操作数栈：[{"num":1},{"num":0}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0x03 -> ICONST\_0 => 局部变量表：[{"num":1},{"num":0}] 操作数栈：[{"num":1},{"num":0}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0x3e -> ISTORE\_3 => 局部变量表：[{"num":0},{"num":0}] 操作数栈：[{"num":0},{"num":0}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0x1d -> ILOAD\_3 => 局部变量表：[{"num":0},{"num":0}] 操作数栈：[{"num":0},{"num":0}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0x1c -> ILOAD\_2 => 局部变量表：[{"num":0},{"num":0}] 操作数栈：[{"num":0},{"num":0}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0xa2 -> IF\_ICMPGE => 局部变量表：[{"num":0},{"num":1}] 操作数栈：[{"num":0},{"num":1}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0x2b -> ALOAD\_1 => 局部变量表：[{"num":0},{"num":1}] 操作数栈：[{"num":0},{"num":1}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0x1d -> ILOAD\_3 => 局部变量表：[{"num":0,"ref":{}},{"num":1}] 操作数栈：[{"num":0,"ref":{}},{"num":1}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0x32 -> AALOAD => 局部变量表：[{"num":0,"ref":{}},{"num":0}] 操作数栈：[{"num":0,"ref":{}},{"num":0}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0x3a -> ASTORE => 局部变量表：[{"num":0,"ref":{}},{"num":0}] 操作数栈：[{"num":0,"ref":{}},{"num":0}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0xb2 -> GET\_STATIC => 局部变量表：[{"num":0},{"num":0}] 操作数栈：[{"num":0},{"num":0}]

java/lang/Object.<clinit>()     寄存器(指令)：0xb8 -> INVOKE\_STATIC => 局部变量表：null 操作数栈：null

java/lang/Object.<clinit>()     寄存器(指令)：0xb1 -> RETURN => 局部变量表：null 操作数栈：null

java/lang/System.<clinit>()     寄存器(指令)：0xb8 -> INVOKE\_STATIC => 局部变量表：[{"num":0}] 操作数栈：[{"num":0}]

java/lang/System.<clinit>()     寄存器(指令)：0x01 -> ACONST\_NULL => 局部变量表：[{"num":0}] 操作数栈：[{"num":0}]

java/lang/System.<clinit>()     寄存器(指令)：0xb3 -> PUT\_STATIC => 局部变量表：[{"num":0}] 操作数栈：[{"num":0}]

java/lang/System.<clinit>()     寄存器(指令)：0x01 -> ACONST\_NULL => 局部变量表：[{"num":0}] 操作数栈：[{"num":0}]

java/lang/System.<clinit>()     寄存器(指令)：0xb3 -> PUT\_STATIC => 局部变量表：[{"num":0}] 操作数栈：[{"num":0}]

java/lang/System.<clinit>()     寄存器(指令)：0x01 -> ACONST\_NULL => 局部变量表：[{"num":0}] 操作数栈：[{"num":0}]

java/lang/System.<clinit>()     寄存器(指令)：0xb3 -> PUT\_STATIC => 局部变量表：[{"num":0}] 操作数栈：[{"num":0}]

java/lang/System.<clinit>()     寄存器(指令)：0x01 -> ACONST\_NULL => 局部变量表：[{"num":0}] 操作数栈：[{"num":0}]

java/lang/System.<clinit>()     寄存器(指令)：0xb3 -> PUT\_STATIC => 局部变量表：[{"num":0}] 操作数栈：[{"num":0}]

java/lang/System.<clinit>()     寄存器(指令)：0x01 -> ACONST\_NULL => 局部变量表：[{"num":0}] 操作数栈：[{"num":0}]

java/lang/System.<clinit>()     寄存器(指令)：0xb3 -> PUT\_STATIC => 局部变量表：[{"num":0}] 操作数栈：[{"num":0}]

java/lang/System.<clinit>()     寄存器(指令)：0xb1 -> RETURN => 局部变量表：[{"num":0}] 操作数栈：[{"num":0}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0xb2 -> GET\_STATIC => 局部变量表：[{"num":0},{"num":0}] 操作数栈：[{"num":0},{"num":0}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0x19 -> ALOAD => 局部变量表：[{"num":0},{"num":0}] 操作数栈：[{"num":0},{"num":0}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0xb6 -> INVOKE\_VIRTUAL => 局部变量表：[{"num":0},{"num":0,"ref":{}}] 操作数栈：[{"num":0},{"num":0,"ref":{}}]



你好，java版虚拟机v1.0，欢迎你的到来。



org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0x84 -> IINC => 局部变量表：[{"num":0},{"num":0}] 操作数栈：[{"num":0},{"num":0}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0xa7 -> GOTO => 局部变量表：[{"num":0},{"num":0}] 操作数栈：[{"num":0},{"num":0}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0x1d -> ILOAD\_3 => 局部变量表：[{"num":0},{"num":0}] 操作数栈：[{"num":0},{"num":0}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0x1c -> ILOAD\_2 => 局部变量表：[{"num":1},{"num":0}] 操作数栈：[{"num":1},{"num":0}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0xa2 -> IF\_ICMPGE => 局部变量表：[{"num":1},{"num":1}] 操作数栈：[{"num":1},{"num":1}]

org/itstack/demo/test/HelloWorld.main()     寄存器(指令)：0xb1 -> RETURN => 局部变量表：[{"num":1},{"num":1}] 操作数栈：[{"num":1},{"num":1}]

原创声明：本文系作者授权腾讯云开发者社区发表，未经许可，不得转载。

如有侵权，请联系 cloudcommunity@tencent.com 删除。

java
编程算法

原创声明：本文系作者授权腾讯云开发者社区发表，未经许可，不得转载。

如有侵权，请联系 cloudcommunity@tencent.com 删除。

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目录
  • 一、案例介绍
  • 二、环境准备
  • 三、配置信息
  • 四、代码示例
  • 五、测试结果
    • 1. 测试结果一；执行数组
      • 2. 测试结果二；输出字符
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