如何编译存储在字符串中的Java类，或者使用带有给定输入的路径？

import javax.tools.JavaCompiler;
import javax.tools.ToolProvider;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class StringClassCompiler {
    public static void main(String[] args) throws IOException {
        String className = "MyClass";
        String sourceCode = "public class MyClass { public static void main(String[] args) { System.out.println(\"Hello, World!\"); } }";

        // 将源代码写入到Java文件中
        File sourceFile = new File(className + ".java");
        FileWriter writer = new FileWriter(sourceFile);
        writer.write(sourceCode);
        writer.close();

        // 使用Java Compiler API编译Java文件
        JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
        compiler.run(null, null, null, sourceFile.getPath());

        // 加载编译后的类并执行
        try {
            Class<?> clazz = Class.forName(className);
            clazz.getDeclaredMethod("main", String[].class).invoke(null, (Object) args);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;

public class StringClassLoader {
    public static void main(String[] args) throws IOException, ClassNotFoundException {
        String className = "MyClass";
        String sourceCode = "public class MyClass { public static void main(String[] args) { System.out.println(\"Hello, World!\"); } }";

        // 将源代码写入到Java文件中
        File sourceFile = new File(className + ".java");
        FileOutputStream writer = new FileOutputStream(sourceFile);
        writer.write(sourceCode.getBytes(StandardCharsets.UTF_8));
        writer.close();

        // 使用Java Compiler API编译Java文件
        Process process = Runtime.getRuntime().exec("javac " + sourceFile.getPath());
        try {
            process.waitFor();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

        // 加载编译后的类并执行
        MyClassLoader classLoader = new MyClassLoader();
        Class<?> clazz = classLoader.loadClass(className);
        clazz.getDeclaredMethod("main", String[].class).invoke(null, (Object) args);
    }

    static class MyClassLoader extends ClassLoader {
        @Override
        protected Class<?> findClass(String name) throws ClassNotFoundException {
            try {
                byte[] bytes = getClassBytes(name);
                return defineClass(name, bytes, 0, bytes.length);
            } catch (IOException e) {
                throw new ClassNotFoundException(name, e);
            }
        }

        private byte[] getClassBytes(String className) throws IOException {
            File classFile = new File(className + ".class");
            byte[] buffer = new byte[(int) classFile.length()];
            FileOutputStream fis = new FileOutputStream(classFile);
            fis.read(buffer);
            fis.close();
            return buffer;
        }
    }
}