21.6 死锁

示例

package com.thinking.in.java.course.chapter21.deadLock2;
public class Aoo {
    private Voo voo;
    public Aoo(Voo voo){
        this.voo = voo;
    }
    public synchronized void a1(){
        System.out.println("a1------");
        voo.v1();
    }
    public synchronized void a2(){
        System.out.println("a2------");
    }
}
//--------------------------------------------
package com.thinking.in.java.course.chapter21.deadLock2;
public class Voo {
    private Aoo aoo;
    public void setAoo(Aoo aoo) {
        this.aoo = aoo;
    }
    public synchronized void v1(){
        System.out.println("v1======");
    }
    public synchronized void v2(){
        System.out.println("v2======");
        aoo.a2();
    }
}
//--------------------------------------
public class DeadLock2 {
    public static void main(String[] args) {
        final Voo voo = new Voo();
        final Aoo aoo = new Aoo(voo);
        voo.setAoo(aoo);
        new Thread(()->{
            while (true){
                voo.v2();
            }
        }).start();
        new Thread(()->{
            while (true){
                aoo.a1();
            }
        }).start();
    }
}