手写java死锁及排查

class Resource implements Runnable{
    
    
    private String lockA;
    private String lockB;

    public Resource(String lockA, String lockB) {
    
    
        this.lockA = lockA;
        this.lockB = lockB;
    }

    @Override
    public void run() {
    
    
        synchronized (lockA) {
    
    
            System.out.println(Thread.currentThread().getName() + "获取了锁"+lockA+ "尝试获得锁B"+lockB);
            synchronized (lockB) {
    
    

            }
        }
    }
}

public class DeadLock {
    
    

    public static void main(String[] args) {
    
    
        new Thread(new Resource("lockA","lockB"),"AAA").start();
        new Thread(new Resource("lockB","lockA"),"BBB").start();
    }
}

解决办法

1.jps -l 命令定位进程号 (jps相当于linux的ps) 找到自己的包名

2.jstack+进程号 (9632)