如何通过java代码执行java命令？

try {
    // 获取Runtime对象
    Runtime runtime = Runtime.getRuntime();
    
    // 执行Java命令
    Process process = runtime.exec("java -jar yourJarFile.jar");
    
    // 等待命令执行完成
    int exitCode = process.waitFor();
    
    // 检查命令执行结果
    if (exitCode == 0) {
        System.out.println("命令执行成功");
    } else {
        System.out.println("命令执行失败");
    }
} catch (IOException | InterruptedException e) {
    e.printStackTrace();
}

try {
    // 创建ProcessBuilder对象
    ProcessBuilder processBuilder = new ProcessBuilder("java", "-jar", "yourJarFile.jar");
    
    // 启动进程
    Process process = processBuilder.start();
    
    // 等待命令执行完成
    int exitCode = process.waitFor();
    
    // 检查命令执行结果
    if (exitCode == 0) {
        System.out.println("命令执行成功");
    } else {
        System.out.println("命令执行失败");
    }
} catch (IOException | InterruptedException e) {
    e.printStackTrace();
}