java lock四种用法

1.普通用法

public static void testlock() {
		Lock lock = new ReentrantLock();
		Thread t = new Thread(new Runnable() {

			@Override
			public void run() {
				// TODO Auto-generated method stub
				lock.lock();
				try {
					Thread.sleep(1000);
					System.out.println("goon");
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} finally {
					lock.unlock();
				}
			}

		});

		t.start();
		System.out.println("start");
		lock.lock();
		System.out.println("over");
		lock.unlock();
	}

start
goon
over

2.trylock

public static void testtry() {
		Lock lock = new ReentrantLock();
		Thread t = new Thread(new Runnable() {

			@Override
			public void run() {
				// TODO Auto-generated method stub
				lock.lock();
				System.out.println("get");
				try {
					Thread.sleep(1000);
					
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} finally {
					lock.unlock();
					System.out.println("release");
				}
			}

		});

		Thread t1 = new Thread(new Runnable() {
			
			@Override
			public void run() {
				// TODO Auto-generated method stub
				
				try {
					Thread.sleep(100);
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				
				while (true) {
					if (lock.tryLock()) {
							System.out.println("get success");
							lock.unlock();
							break;
					}else {
						System.out.println("get faile ... ");
						try {
							Thread.sleep(100);
						} catch (InterruptedException e) {
							// TODO Auto-generated catch block
							e.printStackTrace();
						}
					}
				}
			}

		});
		
		t.start();
		t1.start();

	}

get
get faile ... 
get faile ... 
get faile ... 
get faile ... 
get faile ... 
get faile ... 
get faile ... 
get faile ... 
get faile ... 
release
get success

3.interruptlock

public static void testinterrupt() {
		Lock lock = new ReentrantLock();
		Thread t = new Thread(new Runnable() {

			@Override
			public void run() {
				// TODO Auto-generated method stub
				lock.lock();
				try {
					Thread.sleep(10000);
					System.out.println("goon ...");
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} finally {
					lock.unlock();
				}
			}

		});
		
		Thread t1 = new Thread(new Runnable() {

			@Override
			public void run() {
				// TODO Auto-generated method stub
				try {
					lock.lockInterruptibly();
					System.out.println("get ...");
					lock.unlock();
				} catch (InterruptedException e1) {
					// TODO Auto-generated catch block
					//e1.printStackTrace();
					
					System.out.println("interrupt ... ");
				}
				
			}

		});
		
		t.start();
		t1.start();
		
		try {
			Thread.sleep(5000);
		}catch (InterruptedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		System.out.println("to interrupt ");
		t1.interrupt();
	}

to interrupt 
interrupt ... 
goon ...

4.delay

public static void testdelay() {
		Lock lock = new ReentrantLock();
		Thread t = new Thread(new Runnable() {

			@Override
			public void run() {
				// TODO Auto-generated method stub
				lock.lock();
				try {
					Thread.sleep(10000);
					System.out.println("goon ...");
				} catch (InterruptedException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} finally {
					lock.unlock();
				}
			}

		});
		
		Thread t1 = new Thread(new Runnable() {

			@Override
			public void run() {
				// TODO Auto-generated method stub
				try {
					if(lock.tryLock(5, TimeUnit.SECONDS)) {
						System.out.println("get ...");
						lock.unlock();
					}else {
						System.out.println("have not get  ...");
					}
				} catch (InterruptedException e1) {
					// TODO Auto-generated catch block
					//e1.printStackTrace();
					
					System.out.println("interrupt ... ");
				}
				
			}

		});
		
		t.start();
		t1.start();
	}

have not get  ...
goon ...