Thread-1: try get lock A...
Thread-1: lock A got. // 线程1此时处于Time Waiting状态，仍持有lock A
Thread-2: try get lock A... // 线程2申请获取lock A，处于Waiting状态（?）
Thread-1: try get lock B... // 线程1被唤醒，继续运行
Thread-1: lock B got.
Thread-1: lock B released.
Thread-1: lock A released.
Thread-2: lock A got.
Thread-2: try get lock B...
Thread-2: lock B got.
Thread-2: lock B released.
Thread-2: lock A released.
代码：
package com.itranswarp.learnjava;
/**
* Learn Java from https://www.liaoxuefeng.com/
*
* @author liaoxuefeng
*/
public class Main {
static final Object LOCK_A = new Object();
static final Object LOCK_B = new Object();
public static void main(String[] args) {
new Thread1().start();
new Thread2().start();
}
static void sleep1s() {
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
class Thread1 extends Thread {
public void run() {
System.out.println("Thread-1: try get lock A...");
synchronized (Main.LOCK_A) {
System.out.println("Thread-1: lock A got.");
Main.sleep1s();
System.out.println("Thread-1: try get lock B...");
synchronized (Main.LOCK_B) {
System.out.println("Thread-1: lock B got.");
Main.sleep1s();
}
System.out.println("Thread-1: lock B released.");
}
System.out.println("Thread-1: lock A released.");
}
}
class Thread2 extends Thread {
public void run() {
System.out.println("Thread-2: try get lock A...");
synchronized (Main.LOCK_A) {
System.out.println("Thread-2: lock A got.");
Main.sleep1s();
System.out.println("Thread-2: try get lock B...");
synchronized (Main.LOCK_B) {
System.out.println("Thread-2: lock B got.");
Main.sleep1s();
}
System.out.println("Thread-2: lock B released.");
}
System.out.println("Thread-2: lock A released.");
}
}
D
程序输出：
代码：