死锁示例

来自尚硅谷视屏

package thread;


public class Thread004 {
    public static void main(String[] args) {
        StringBuffer sf=new StringBuffer();
        StringBuffer sf2=new StringBuffer();
        new Thread(){
            public void run(){
                synchronized (sf){
                    sf.append("a");
                    sf2.append("1");
                    synchronized (sf2){
                        sf.append("b");
                        sf2.append("2");
                    }
                }
            }
        }.start();
        new Thread(new Runnable() {
            @Override
            public void run() {
                synchronized (sf2){
                    sf.append("c");
                    sf2.append("3");
                    synchronized (sf){
                        sf.append("d");
                        sf2.append("4");
                    }
                }
            }
        }).start();
    }
}