TEST CODE

public class Thread implements Runnable {
    // 执行目标
    private Runnable target;
    // 调用执行目标的run()方法
    @Override
    public void run() {
        if (target != null) {
            target.run();
        }
    }
    // 包含执行目标的构造器
    public Thread(Runnable target, String name) {
        init(null, target, name, 0);
    }
}