1、lock()最常用;
2、lockInterruptibly()方法一般更昂贵，有的impl可能没有实现lockInterruptibly()，只有真的需要效应中断时，才使用，使用之前看看impl对该方法的描述。
- trylock
package lock;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
public class GetLock_Demo {
static Lock lock = new ReentrantLock();
public static void main(String[] args) throws InterruptedException {
lock.lock(); //主线程拿到锁
Thread th = new Thread(new Runnable() {
@Override
public void run() {
boolean rs = lock.tryLock();
System.out.println("是否获取到锁: " + rs);
}
});
th.start();
Thread.sleep(2000L);
th.interrupt();//中断线程运行
System.out.println("th 线程被中断了");
}
}- trylock带超时
package lock;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
public class GetLock_Demo {
static Lock lock = new ReentrantLock();
public static void main(String[] args) throws InterruptedException {
lock.lock(); //主线程拿到锁
Thread th = new Thread(new Runnable() {
@Override
public void run() {
boolean rs = false;
try {
rs = lock.tryLock(1, TimeUnit.SECONDS);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("是否获取到锁: " + rs);
}
});
th.start();
Thread.sleep(2000L);
th.interrupt();//中断线程运行
System.out.println("th 线程被中断了");
}
}
