儿童节,托儿所。
package ym.com.yjc;
/**
-
此类用于演示死锁 A B 俩各类 分别有一个 money 属性 如果 A 增加 100 则 b 减 100 相反 b+100 a-100
*/
public class TestLock {
public static void main(String[] args) {
A a = new A();
B b = new B();
DeadLockDemo deadLockDemo = new DeadLockDemo(a, b, true);
deadLockDemo.start();
DeadLockDemo deadLockDemo1 = new DeadLockDemo(a, b, false);
deadLockDemo1.start();}
}
class DeadLockDemo extends Thread {
A a;
B b;
public DeadLockDemo(A a, B b, boolean flag) {
this.a = a;
this.b = b;
this.flag = flag;
}
boolean flag;
@Override
public void run() {
if (flag) {
synchronized (a) {
a.save();
synchronized (b) {
b.minus();
}
}
} else {
synchronized (b) {
b.save();
synchronized (a) {
a.minus();
}
}
}
}
}
class A {
public int a;
public void save() {
a = a + 100;
System.out.println("a=" + a);
}
public void minus() {
a = a - 100;
System.out.println("a=" + a);
}
}
class B {
public int b;
public void save() {
b = b + 100;
System.out.println("b=" + b);
}
public void minus() {
System.out.println("b=" + b);
b = b - 100;
}
}