java0012——线程

两种线程

1. Thread类

package Thread;
import java.lang.*;
class MyThread extends Thread{
	private String name;
	public MyThread(String name) {
		super();
		this.name=name;
	}
	public void run() {
		for(int i=0;i<10;i++) {
			System.out.println("name"+this.name+"运行, "+i);
		}
	}
}
public class DemoThread {
/**
 * thrad常用方法
 * 1.	public Thread CurrentThread()	返回当前运行的进程
 * 2.	public String getName()			返回线程的名字
 * 3.	public void	  sleep(in m)		休眠m毫秒
 * 4.	public void   start()			启动线程	
 * 5.	public void   run()				线程的主体有jvm实现
 */
//		我们一般使用就是重写run()方法
	public static void main(String[] args) {
		MyThread demo0=new MyThread("线程A");
		MyThread demo1=new MyThread("线程B");
		demo0.start();
		demo1.start();
	}
}

2. Runnable类

package Thread;

import java.lang.*;

class myRunnale implements Runnable {
	private String name;

	public myRunnale(String name) {
		this.name = name;
	}

	public void run() {
		for (int i = 0; i < 10; i++)
			System.out.println("name:" + this.name + ",run" + i);
	}
}

public class DemoRunnable {
	public static void main(String[] args) {

		myRunnale demo1 = new myRunnale("thread1");
		myRunnale demo2 = new myRunnale("thread2");
		Thread t1 = new Thread(demo1);
		Thread t2 = new Thread(demo2);
		t1.start();
		t2.start();

	}
}

3. 异同
   Runnable 实现了真正意义上的资源共享

/*
*共享了mt实现的run方法
*/
MyThread mt = new MyThread();
Thread t1 = new Thread(mt);
Thread t2 = new Thread(mt) ;
t1.start();
t2.start();

4. 线程的优先级
   void Thread.MIN.setPriority(int grade);
   先执行优先级高的线程,
   优先级高的线程结束后执行优先级低的线程
   10~1
   10最高
5. 多线程简单买票

package Thread;

import java.lang.*;

import com.sun.javafx.font.t2k.T2KFactory;
import com.sun.jndi.url.iiopname.iiopnameURLContextFactory;

class TiketSales implements Runnable {
	private int ticket = 5;

	public void run() {
		for (int i = 0; i < 20; i++)
			this.sale();
	}

	private synchronized void sale() {
		if (this.ticket > 0) {
			try {
				Thread.sleep(300);
			} catch (InterruptedException e) {
				// TODO: handle exception
				e.printStackTrace();
			}
			System.out.println(Thread.currentThread().getName() + "卖票:ticket=" + this.ticket--);
		}
	}
}

public class TicketSalesDemo {
	public static void main(String[] args) {

		TiketSales demo = new TiketSales();
		Thread t1 = new Thread(demo);
		Thread t2 = new Thread(demo);
		Thread t3 = new Thread(demo);
		t1.start();
		t2.start();
		t3.start();
	}
}