package locks;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.concurrent.locks.Lock;
public class LockTest {
private static final int threadInitNumber = 10;
private static final Lock lock = new java.util.concurrent.locks.ReentrantLock();
private List<String> list = new ArrayList<String>();
public static void main(String[] args){
final LockTest lockTest = new LockTest();
for(int i=0;i<threadInitNumber;i++){
new Thread(new Runnable(){
@Override
public void run() {
lockTest.insert(Thread.currentThread());
}
}).start();
}
}
public void insert(Thread thread){
lock.lock();
//获取锁
try{
System.out.println(thread.getName() + "获得了锁...");
list.add(String.valueOf(new Random().nextInt(10)));
}finally{
System.out.println(thread.getName() + "释放锁...");
lock.unlock();
}
}
}
package locks;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.concurrent.locks.Lock;
public class TryLockTest {
private static final int threadInitNumber = 10;
private static final Lock lock = new java.util.concurrent.locks.ReentrantLock();
private List<String> list = new ArrayList<String>();
public static void main(String[] args){
final TryLockTest lockTest = new TryLockTest();
for(int i=0;i<threadInitNumber;i++){
new Thread(new Runnable(){
@Override
public void run() {
try {
lockTest.insert(Thread.currentThread());
} catch (InterruptedException e) {
e.printStackTrace();
System.out.println(Thread.currentThread() + "线程被中断...");
}
}
}).start();
}
}
public void insert(Thread thread) throws InterruptedException{
//获取锁
//注意，如果需要正确中断等待锁的线程，必须将获取锁放在外面，然后将InterruptedException抛出
lock.lockInterruptibly();
try{
System.out.println(thread.getName() + "获得了锁...");
while(true){
list.add(String.valueOf(new Random().nextInt(10)));
}
}finally{
System.out.println(thread.getName() + "释放锁...");
lock.unlock();
}
}
}
package locks;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.concurrent.locks.Lock;
public class LockInterruptiblyTest {
private static final int threadInitNumber = 10;
private static final Lock lock = new java.util.concurrent.locks.ReentrantLock();
private List<String> list = new ArrayList<String>();
public static void main(String[] args){
final LockInterruptiblyTest lockTest = new LockInterruptiblyTest();
for(int i=0;i<threadInitNumber;i++){
new Thread(new Runnable(){
@Override
public void run() {
lockTest.insert(Thread.currentThread());
}
}).start();
}
}
public void insert(Thread thread){
//获取锁
if(lock.tryLock()){
try{
System.out.println(thread.getName() + "获得了锁...");
list.add(String.valueOf(new Random().nextInt(10)));
}finally{
System.out.println(thread.getName() + "释放锁...");
lock.unlock();
}
}
//未获取锁
else{
System.out.println("未获取锁");
}
}
}