多线程死锁代码实例

来源：互联网发布：汕头市大数据产业协会编辑：程序博客网时间：2024/05/05 16:25

package com.oyqh;    public class RunnableTest implements Runnable {      private int flag = 1;      private Object obj1 = new Object(), obj2 = new Object();        public void run() {          System.out.println("flag=" + flag);          if (flag == 1) {              synchronized (obj1) {                  System.out.println("我已经锁定obj1，休息0.5秒后锁定obj2去！");                  try {                      Thread.sleep(500);                  } catch (InterruptedException e) {                      e.printStackTrace();                  }                  synchronized (obj2) {                      System.out.println("1");                  }              }          }          if (flag == 0) {              synchronized (obj2) {                  System.out.println("我已经锁定obj2，休息0.5秒后锁定obj1去！");                  try {                      Thread.sleep(500);                  } catch (InterruptedException e) {                      e.printStackTrace();                  }                  synchronized (obj1) {                      System.out.println("0");                  }              }          }      }        public static void main(String[] args) {          RunnableTest run01 = new RunnableTest();          RunnableTest run02 = new RunnableTest();          run01.flag = 1;          run02.flag = 0;          Thread thread01 = new Thread(run01);          Thread thread02 = new Thread(run02);          System.out.println("线程开始喽！");          thread01.start();          thread02.start();      }  }

上述代码实际运行时并不会产生死锁现象，若要死锁，则需要将 private Object obj1 = new Object(), obj2 = new Object();

改为 private static Object obj1 = new Object(), obj2 = new Object();