Java 排查死锁的几种方式

文章目录

死锁案例

public class Test001 {

    final static Object obj = new Object();
    final static Object obj2 = new Object();


    public static void main(String[] args) {
        ExecutorService executorService = Executors.newFixedThreadPool(2);
        executorService.execute(()->get());
        executorService.execute(()->get2());
    }

    public static void get(){
        synchronized (obj){
            System.out.println("线程："+Thread.currentThread().getName()+" 持有了锁- obj ,等待持有- obj2");
            try {
                Thread.sleep(2000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            synchronized (obj2){
                System.out.println("线程："+Thread.currentThread().getName()+" 持有了锁- obj2");
            }
        }
    }

    public static void get2(){
        synchronized (obj2){
            System.out.println("线程："+Thread.currentThread().getName()+" 持有了锁- obj2 ,等待持有- obj");
            try {
                Thread.sleep(2000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            synchronized (obj){
                System.out.println("线程："+Thread.currentThread().getName()+" 持有了锁- obj");
            }
        }
    }


}