동기화 synchronized(this) 코드 블록이 현재 대상을 잠그는 것을 검증합니다 (synchronized 방법과 마찬가지로synchronized(this)도 현재 대상을 잠그는 것입니다)
2296 단어 [병렬 프로그래밍]
synchronized 방법과 마찬가지로synchronized(this)도 현재 대상을 잠그는 것입니다
package mytask;
public class Task {
synchronized public void otherMethod() {
System.out.println("------------------------run--otherMethod");
}
public void doLongTimeTask() {
synchronized (this) {
for (int i = 0; i < 10000; i++) {
System.out.println("synchronized threadName="
+ Thread.currentThread().getName() + " i=" + (i + 1));
}
}
}
}
package mythread;
import mytask.Task;
public class MyThread1 extends Thread {
private Task task;
public MyThread1(Task task) {
super();
this.task = task;
}
@Override
public void run() {
super.run();
task.doLongTimeTask();
}
}
package mythread;
import mytask.Task;
public class MyThread2 extends Thread {
private Task task;
public MyThread2(Task task) {
super();
this.task = task;
}
@Override
public void run() {
super.run();
task.otherMethod();
}
}
package test;
import mytask.Task;
import mythread.MyThread1;
import mythread.MyThread2;
public class Run {
public static void main(String[] args) throws InterruptedException {
Task task = new Task();
MyThread1 thread1 = new MyThread1(task);
thread1.start();
Thread.sleep(100);
MyThread2 thread2 = new MyThread2(task);
thread2.start();
}
}
결실
synchronized threadName=Thread-0 i=1
synchronized threadName=Thread-0 i=2
synchronized threadName=Thread-0 i=3
synchronized threadName=Thread-0 i=4
synchronized threadName=Thread-0 i=5
synchronized threadName=Thread-0 i=6
synchronized threadName=Thread-0 i=7
synchronized threadName=Thread-0 i=8
synchronized threadName=Thread-0 i=9
synchronized threadName=Thread-0 i=10
Thread-1run--otherMethod