首页 > 代码库 > java5 中的锁的用法 Lock lock = new ReentrantLock();
java5 中的锁的用法 Lock lock = new ReentrantLock();
public class LockTest {
/**
* @param args
*/
public static void main(String[] args) {
new LockTest().init();
}
private void init(){
final Outputer outputer = new Outputer();
new Thread(new Runnable(){
@Override
public void run() {
while(true){
try {
Thread.sleep(10);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
outputer.output("zhangxiaoxiang");
}
}
}).start();
new Thread(new Runnable(){
@Override
public void run() {
while(true){
try {
Thread.sleep(10);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
outputer.output("lihuoming");
}
}
}).start();
}
static class Outputer{
Lock lock = new ReentrantLock();
public void output(String name){
int len = name.length();
lock.lock();
try{
for(int i=0;i<len;i++){
System.out.print(name.charAt(i));
}
System.out.println();
}finally{
lock.unlock();
}
}
public synchronized void output2(String name){
int len = name.length();
for(int i=0;i<len;i++){
System.out.print(name.charAt(i));
}
System.out.println();
}
public static synchronized void output3(String name){
int len = name.length();
for(int i=0;i<len;i++){
System.out.print(name.charAt(i));
}
System.out.println();
}
}
}
读写锁 ReadWriteLock rwl = new ReentrantReadWriteLock();
public class ReadWriteLockTest {
public static void main(String[] args) {
final Queue3 q3 = new Queue3();
for(int i=0;i<3;i++)
{
new Thread(){
public void run(){
while(true){
q3.get();
}
}
}.start();
new Thread(){
public void run(){
while(true){
q3.put(new Random().nextInt(10000));
}
}
}.start();
}
}
}
class Queue3{
private Object data = http://www.mamicode.com/null;//共享数据，只能有一个线程能写该数据，但可以有多个线程同时读该数据。
ReadWriteLock rwl = new ReentrantReadWriteLock();
public void get(){
rwl.readLock().lock();
try {
System.out.println(Thread.currentThread().getName() + " be ready to read data!");
Thread.sleep((long)(Math.random()*1000));
System.out.println(Thread.currentThread().getName() + "have read data :" + data);
} catch (InterruptedException e) {
e.printStackTrace();
}finally{
rwl.readLock().unlock();
}
}
public void put(Object data){
rwl.writeLock().lock();
try {
System.out.println(Thread.currentThread().getName() + " be ready to write data!");
Thread.sleep((long)(Math.random()*1000));
this.data = http://www.mamicode.com/data;
System.out.println(Thread.currentThread().getName() + " have write data: " + data);
} catch (InterruptedException e) {
e.printStackTrace();
}finally{
rwl.writeLock().unlock();
}
}
}
java5 中的锁的用法 Lock lock = new ReentrantLock();