nosuchmethoderror: class '_internallinkedhashmap<string, dynamic>' has no in - 腾讯云开发者社区

/** * Groovy 默认都是public */ class Person { String name Integer age def increase(Integer...Person implements Action{ String name Integer age def increase(Integer year){ ...deal方法 class Car implements CarDealer{ def deal(){ println &#039;hello car&#039; } }...;i can play&#039; } } class Person implements DefaultAction{ String name Integer age ...：将外部注入的属性与方法设置为全局可以使用 class Entry { static void main(def args){ println &#039;应用程序正在启动...

3291 0

Android 安全

MessageDisgest对象的disgest方法完成计算，计算结果通过字节类型返回处理计算结果普遍使用加密方式有：位运算，格式化字符串，使用算法将加密后的数据转换成16进制代码： public class...MD5Util { public final static String getMD5String(String s) { char hexDigits[] = { &...#039;0&#039;, &#039;1&#039;, &#039;2&#039;, &#039;3&#039;, &#039;4&#039;, &#039;5&#039...;, &#039;6&#039;, &#039;7&#039;, &#039;8&#039;, &#039;9&#039;, &#039;A&#039;, &#039...;B&#039;, &#039;C&#039;, &#039;D&#039;, &#039;E&#039;, &#039;F&#039; }; try {

1.1K1 0

您找到你想要的搜索结果了吗？

是的

没有找到

从0到1打造正则表达式执行引擎

public class State { private static int idCnt = 0; private int id; private int stateType;...public class NFAGraph { public State start; public State end; public NFAGraph(State start...private static NFAGraph regex2nfa(String regex) { Reader reader = new Reader(regex);...;(&#039; : { String subRegex = reader.getSubRegex(reader); NFAGraph...;|&#039; : { String remainRegex = reader.getRemainRegex(reader);

7602 0

Kotlin 轻量级Android开发

Java中，如果想要创建数据类或是POJO类（只保存了一些状态的类），我们需要创建一个拥有大量字段、getters与setters的类，也许还要提供toString与equals方法： public class...;" + name + &#039;\&#039;&#039; + ", url=&#039;" + url + &#039;\&#039;...&#039; + ", mbid=&#039;" + mbid + &#039;\&#039;&#039; + &#039...;}&#039;; } } 在Kotlin中，上述代码可以写成下面这样： data class Artist (? ...quot;B") } fun bar() { println("bar") } } // 多继承时，显式指定 super<A>.foo() 以去冲突 class

9231 0

用Netty实现WebSocket网络聊天室

@Service public class WebSocketServer { static final String WEBSOCKET_PATH = "/ws";...quot;ws"; if (cp.get(SslHandler.class) !...public final class WebSocketServerIndexPage { public static ByteBuf getContent(String webSocketLocation...&#039;\\n&#039; + event.data\n" + " ta.scrollTop =...;msgForm&#039;).value = &#039;&#039;\n" + " } else {\

1181 0

Redis源码剖析之压缩列表(ziplist)

不同的encoding类型示例如下: |00pppppp| - 1字节长度小于或者等于63的String类型，'pppppp'无符号6位数标识string长度。...则表示string的长度，如果是整数，则len依赖于具体数值大小。...} else { /* &#039;encoding&#039; is untouched, however zipStoreEntryEncoding will use the...= 0, the raw length of the next entry has changed, so * we need to cascade the update throughout...= 0, the raw length of the next entry has changed, so * we need to cascade the update throughout

6421 0

JNI 数据类型及Java与C++之间互调

就是Ljava/lang/String；如果是数组类型：则在前面加上然后加类型签名，几位数组就加几个，比如int[]->[I，boolean[][]->[[Z，java.lang.Class[] -...> [Ljava/lang/Class；可以通过javap -s来打印该方法的签名 Example： public static native String getName(); public static...native int calculate(int a,int b); 通过Rebuild Project才会在app中的intermediates目录下javac/debug 生成class文件，找到...类到地址然后右键打开命令行在命令行输入 javap -s JNIUtils.class 即可获取到2个方法到签名，我这里是JNIUtils获取的两个签名如下：警告: 二进制文件JNIUtils...;x86&#039;, &#039;x86_64&#039;, &#039;armeabi-v7a&#039;, &#039;arm64-v8a&#039; } 然后在cpp文件中添加

2.2K1 0

Toast 的 Window 创建过程

must have been called"); } INotificationManager service = getService(); String...looper == null) { throw new RuntimeException( "Can&#039...;t toast on a thread that has not called Looper.prepare()"); } } ... case HIDE: { handleHide(); // Don&#039...ServiceManager.getService("notification")); return sService; } public void enqueueToast(String

4742 0

Json字段选取器介绍和实现

public class Node { public int type = 0; //jsonObject or jsonArray Map<String, Node> children...public class JsonSelector { private Node startNode; private JsonSelector() {}; // 编译生成语法树...= &#039; &#039;) { break; } } return cnt; } private...static String rmSpace(String str) { String res = str.trim(); int end = res.length();...while(end > 0 && res.charAt(end - 1) == &#039; &#039;) { end--;

7022 0

Retrofit 解析

(&#039;&#039;) //要求JVM查找并加载指定的类 Class.forName("android.os.Build"); if (Build.VERSION.SDK_INT...baseUrl) { checkNotNull(baseUrl, "baseUrl == null"); //将String类型的url装换成okhttp适用的HttpUrl类型...|| responseType == okhttp3.Response.class) { throw methodError("&#039;" + Utils.getRawType...(responseType).getName() + "&#039; is not a valid response body type....@Override public void run() { if (delegate.isCanceled()) { // Emulate OkHttp&#039

1.2K1 0

L1-039. 古风排版

L1-039....）输入样例： 4 This is a test case 输出样例： asa T st ih e tsi ce s import java.util.Scanner; public class...Main { public static char[][] a = new char[1001][1001]; public static void main(String[] args...Scanner cin = new Scanner(System.in); int n = cin.nextInt(); cin.nextLine(); String...} System.out.println(); } } } 题目链接地址https://www.patest.cn/contests/gplt/L1-039

1351 0

以太坊 Iban 地址

clients with the system address found through a Registry-lookup system of the client-ID, denoted by asset class...the last is for transfers to an intermediary with associated data to specify client, denoted by asset class...amount=100&token=ETH 处理程序 public static void main(String[] args) { IBAN iban = new IBAN(); // TODO...Auto-generated method stub String address = iban.toAddress("XE039RBH0XKV9FZMTH2701Q37FLX10NTWXU");...token=ETH&amount=5"); System.out.println("IBAN decode: " + ibanObj.toString()); String ibanString

2.8K16 0

RxJava2 解析

RxJava2 使用 private void analyzeRxJava(){ Observable.create(new ObservableOnSubscribe<String>...NOPMD throw e; } catch (Throwable e) { Exceptions.throwIfFatal(e); // can&#039...;t call onError because no way to know if a Disposable has been set or not // can&#039;t call...Thread newThread(Runnable r) { StringBuilder nameBuilder = new StringBuilder(prefix).append(&#039...;-&#039;).append(incrementAndGet()); String name = nameBuilder.toString(); //判断是否创建非阻塞式线程,scheduler

1.3K1 0

Binder 进程通信

Aidl默认支持的类型包话java基本类型（int、long、boolean等）和（String、List、Map、 CharSequence），使用这些类型时不需要import声明。...package com.ztz.androidhighroad; import android.os.Parcel; import android.os.Parcelable; public class...toString() { return "Book{ " + "bookId=" + bookId + ", bookName=&#039...;" + bookName + &#039;\&#039;&#039; + &#039;}&#039; ; } } 实现 Parcelable 接口是为了后序跨进程通信时使用。..." android:process=":remote"/> 编写客户端类 /** * 客户端类 * * @author Yif */ public class

8472 0

初体验：数据库监控、管理和可观测性工具（PMM）

269b73360bb8992ecce7382aa6a0b689&chksm=faba4ef5cdcdc7e387e49a5f333f3da2e7f3c0d3558578979cf9abb70db8d5e3fc48883da039&...hello-world# （可选）要安装特定版本，可以先列出存储库：yum list docker-ce --showduplicates | sort -ryum install docker-ce- docker-ce-cli- containerd.io docker-buildx-plugin docker-compose-plugin安装 PMM 服务器curl...443:443 --volumes-from pmm-data --name pmm-server --restart always percona/pmm-server:2 PMM Server has...269b73360bb8992ecce7382aa6a0b689&chksm=faba4ef5cdcdc7e387e49a5f333f3da2e7f3c0d3558578979cf9abb70db8d5e3fc48883da039&

2251 0

ubuntu上安装Apache2+ModSecurity及自定义WAF规则

|\\*/|[&#039;;]--|--[\\s\\r\\n\\v\\f]|(?:--[^-]*?-)|([^\\-&])#.*?[\\s\\r\\n\\v\\f]|;?.../usr/share/modsecurity-crs/activated_rules/MY.conf 添加规则 SecRule FILES "@contains %00" "deny,tag:&#039...;WEB_ATTACK/FILEUPLOAD',msg:'filename has null character',id:0000002,phase:2" 测试,上传文件名包含%00的文件 http www.tanjiti.com...String match "%00" at FILES:filename....file "/usr/share/modsecurity-crs/activated_rules/MY.conf"] [line "2"] [id "0000002"] [msg "filename has

1.6K8 0

Java中synchronized与ReentrantLock性能对比

实测结果测试平台：jdk11, MacBook Pro (13-inch, 2017) , jmh测试测试代码如下： public class LockTest { private static...cnt += 1; if (cnt >= (Long.MAX_VALUE >> 1)) { cnt = 0; } } public static void main(String...[] args) { Options options = new OptionsBuilder().include(LockTest.class.getSimpleName()).build()...jcc(Assembler::notZero, allocated); // if found, continue with that one // allocate one if there&#039...:obj_offset_in_bytes()), rax); __ lock_object(rmon); // check to make sure this monitor doesn&#039

9603 0

力扣MyBatis框架三万多字干货，来了解一下？

; ==> Parameters: e4993aecfd4f4322905eb6dc0cf039b9(String), ZWZ4(String), 18(Integer) <== Updates...Row: 9e3eed6af6da4214b520535cac13f13a, ZWZ1改, 18 <== Row: e4993aecfd4f4322905eb6dc0cf039b9...@NoArgsConstructor public class Teacher { private String id; private String name; } ---- 方法一...Student { private String id; private String name; // 对应老师的ID即可 private String teacher...; } 老师 @Data @AllArgsConstructor @NoArgsConstructor public class Teacher { private String id;

4234 0

PHP-5.3向更高版本迁移系列博客使用的php-excel文件类

php /** * Excel_XML */ /** * Class Excel_XML * * A simple export library for dumping array data...* * @author Oliver Schwarz */ class Excel_XML { /**...private $rHandle = null; /** * Constructor * * Instanciates the class...* * @param string $title Desired worksheet title * @return string Corrected...} } $item = str_replace('&#039;', ''', htmlspecialchars($item, ENT_QUOTES

4391 0

python sqlalchemy中create_engine用法

from sqlalchemy import create_engine, Table, Column, Integer, String, MetaData, ForeignKey import MySQLdb...定义表 user = Table('user', metadata, Column('id', Integer, primary_key=True), Column('name', String...color = Table('color', metadata, Column('id', Integer, primary_key=True), Column('name', String...pool_size：是连接池的大小，默认为5个，0表示连接数无限制 pool_recycle： MySQL 默认情况下如果一个连接8小时内容没有任何动作（查询请求）就会自动断开链接，出现 MySQL has...参考：https://blog.csdn.net/P01114245/article/details/89918197 https://www.jianshu.com/p/f039da1d90ce

4.4K2 0

点击加载更多

扫码

添加站长进交流群

领取专属 10元无门槛券

手把手带您无忧上云

Groovy之面向对象

Android 安全

从0到1打造正则表达式执行引擎

Kotlin 轻量级Android开发

用Netty实现WebSocket网络聊天室

Redis源码剖析之压缩列表(ziplist)

JNI 数据类型及Java与C++之间互调

Toast 的 Window 创建过程

Json字段选取器介绍和实现

Retrofit 解析

L1-039. 古风排版

以太坊 Iban 地址

RxJava2 解析

Binder 进程通信

初体验：数据库监控、管理和可观测性工具（PMM）

ubuntu上安装Apache2+ModSecurity及自定义WAF规则

Java中synchronized与ReentrantLock性能对比

力扣MyBatis框架三万多字干货，来了解一下？

PHP-5.3向更高版本迁移系列博客使用的php-excel文件类

python sqlalchemy中create_engine用法

扫码

热门标签

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐