java多线程

package linking;

public class duoxiancheng {
	public static void main(String args[])
	{
		xiancheng test2=new xiancheng("a1");
		xiancheng test6=new xiancheng("a2");
		Runnable test3=new xiancheng2();
		Thread test4=new Thread(test3,"b1");
		Thread test5=new Thread(test3,"b2");

		test2.start();
		test6.start();
		System.out.println("this is mian,start");
		//test4.start();
//		test5.start();
//		try {
//			test5.join();
//		} catch (InterruptedException e) {
//			// TODO Auto-generated catch block
//			e.printStackTrace();
//		}
		System.out.println("this is main ,stop");
	//这里的main是首先启动；
	}
	
}
//继承自thread类
class xiancheng extends Thread
{
	private String name;
	public  xiancheng(String name)
	{
		this.name=name;
	}
	
	private int b=10;
	public void run()
	{
		for(int i=1;i<=10;i++)
		{
		System.out.println("FIRST "+name+"  "+b--);
		}
	}
}
//实现runnable接口
class xiancheng2 implements Runnable
{
	private int b=10;
	@Override
	public void run() {
		for(int i=1;i<=10;i++)
		{
		System.out.println("2TH "+Thread.currentThread().getName()+b--);
		}
	}

1.无特殊情况下main线程都是首先执行

2：join()可以实现线程线程优先执行

3：yield（）也可以实现线程优先，使线程进入runnable状态，实际测试效果不明显，取决与线程优先级和调度算法；

4:stop（）；线程进入睡眠；可以执行优先级低的线程；

5：interrupt（）；残暴；

6：wait;notify,synchronized;典型案例-打印；

	wait与sleep的区别：1；object锁-thread类锁；

					2：控制块-任何地方；

					3：不需要捕获异常-捕获异常；

7：线程控制管理类

8：线程状态与切换；

9：线程值传递：构造方法，普通方法，object;

10：runnable可以实现lock;thread默认不能实现lock;

ps:以下代码转载自：http://blog.youkuaiyun.com/evankaka

public class MyThread1 extends Thread   
{   
private String name;   
public MyThread1(String name)   
{   
this.name = name;   
}   
public void run()   
{   
System.out.println("hello " + name);   
}   
public static void main(String[] args)   
{   
Thread thread = new MyThread1("world");   
thread.start();   
}   
}   

//构造方法

public class MyThread2 implements Runnable   
{   
private String name;   
public void setName(String name)   
{   
this.name = name;   
}   
public void run()   
{   
System.out.println("hello " + name);   
}   
public static void main(String[] args)   
{   
MyThread2 myThread = new MyThread2();   
myThread.setName("world");   
Thread thread = new Thread(myThread);   
thread.start();   
}   
}   

//一般方法

class Data   
{   
public int value = 0;   
}   
class Work   
{   
public void process(Data data, Integer numbers)   
{   
for (int n : numbers)   
{   
data.value += n;   
}   
}   
}   
public class MyThread3 extends Thread   
{   
private Work work;   
public MyThread3(Work work)   
{   
this.work = work;   
}   
public void run()   
{   
java.util.Random random = new java.util.Random();   
Data data = new Data();   
int n1 = random.nextInt(1000);   
int n2 = random.nextInt(2000);   
int n3 = random.nextInt(3000);   
work.process(data, n1, n2, n3); // 使用回调函数   
System.out.println(String.valueOf(n1) + "+" + String.valueOf(n2) + "+"   
+ String.valueOf(n3) + "=" + data.value);   
}   
public static void main(String[] args)   
{   
Thread thread = new MyThread3(new Work());   
thread.start();   
}   
}   

//object;

打印:

public class MyThreadPrinter2 implements Runnable {     
        
    private String name;     
    private Object prev;     
    private Object self;     
    
    private MyThreadPrinter2(String name, Object prev, Object self) {     
        this.name = name;     
        this.prev = prev;     
        this.self = self;     
    }     
    
    @Override    
    public void run() {     
        int count = 10;     
        while (count > 0) {     
            synchronized (prev) {     
                synchronized (self) {     
                    System.out.print(name);     
                    count--;    
                      
                    self.notify();     
                }     
                try {     
                    prev.wait();     
                } catch (InterruptedException e) {     
                    e.printStackTrace();     
                }     
            }     
    
        }     
    }     
    
    public static void main(String[] args) throws Exception {     
        Object a = new Object();     
        Object b = new Object();     
        Object c = new Object();     
        MyThreadPrinter2 pa = new MyThreadPrinter2("A", c, a);     
        MyThreadPrinter2 pb = new MyThreadPrinter2("B", a, b);     
        MyThreadPrinter2 pc = new MyThreadPrinter2("C", b, c);     
             
             
        new Thread(pa).start();  
        Thread.sleep(100);  //确保按顺序A、B、C执行  
        new Thread(pb).start();  
        Thread.sleep(100);    
        new Thread(pc).start();     
        Thread.sleep(100);    
        }     
}    

ThreadB->ThreadC->ThreadA循环执行；

2个锁：自身锁，申请对方的锁；

leave:线程控制管理类；