java实现线程extends Thread

java实现线程extends Thread

通过继承Thread类实现线程

TestThread1.java

/*
	测试线程1
*/
public class TestThread1 {
	public static void main(String args[]) {
		Runner1 r = new Runner1();
		//调用run()方法
		//r.run();
		//Thread t = new Thread(r);
		//开始一个新的分支，与main方法并行执行
		//start()线程启动
		
		//启动线程不需要new Thread，直接调用start
		r.start();
		
		for(int i=0; i<100; i++) {
			System.out.println("Main Thread:------" + i);
		}
	}
}

//通过Runnable接口实现一个线程
//class Runner1 implements Runnable {
//通过继承Thread实现一个线程
class Runner1 extends Thread {
	public void run() {
		for(int i=0; i<100; i++) {	
			System.out.println("Runner1 :" + i);
		}
	}
}

F:\java\Thread>javac TestThread1.java

F:\java\Thread>java TestThread1
Main Thread:------0
Runner1 :0
Main Thread:------1
Runner1 :1
Main Thread:------2
Runner1 :2
Main Thread:------3
Runner1 :3
Main Thread:------4
Runner1 :4
Main Thread:------5
Runner1 :5
Main Thread:------6
Runner1 :6
Main Thread:------7
Runner1 :7
Main Thread:------8
Runner1 :8
Main Thread:------9
Runner1 :9
Main Thread:------10
Runner1 :10
Main Thread:------11
Runner1 :11
Main Thread:------12
Runner1 :12
Main Thread:------13
Runner1 :13
Main Thread:------14
Runner1 :14
Main Thread:------15
Runner1 :15
Runner1 :16
Main Thread:------16
Runner1 :17
Main Thread:------17
Runner1 :18
Main Thread:------18
Main Thread:------19
Runner1 :19
Main Thread:------20
Runner1 :20
Main Thread:------21
Runner1 :21
Main Thread:------22
Runner1 :22
Main Thread:------23
Runner1 :23
Main Thread:------24
Runner1 :24
Main Thread:------25
Runner1 :25
Main Thread:------26
Runner1 :26
Main Thread:------27
Runner1 :27
Main Thread:------28
Runner1 :28
Main Thread:------29
Runner1 :29
Main Thread:------30
Runner1 :30
Main Thread:------31
Main Thread:------32
Runner1 :31
Main Thread:------33
Runner1 :32
Main Thread:------34
Runner1 :33
Main Thread:------35
Runner1 :34
Main Thread:------36
Runner1 :35
Main Thread:------37
Runner1 :36
Main Thread:------38
Runner1 :37
Main Thread:------39
Runner1 :38
Main Thread:------40
Runner1 :39
Main Thread:------41
Runner1 :40
Main Thread:------42
Runner1 :41
Main Thread:------43
Runner1 :42
Main Thread:------44
Runner1 :43
Main Thread:------45
Runner1 :44
Main Thread:------46
Runner1 :45
Main Thread:------47
Runner1 :46
Main Thread:------48
Runner1 :47
Main Thread:------49
Runner1 :48
Main Thread:------50
Runner1 :49
Main Thread:------51
Runner1 :50
Main Thread:------52
Runner1 :51
Main Thread:------53
Runner1 :52
Main Thread:------54
Runner1 :53
Main Thread:------55
Runner1 :54
Main Thread:------56
Runner1 :55
Main Thread:------57
Runner1 :56
Main Thread:------58
Runner1 :57
Main Thread:------59
Runner1 :58
Main Thread:------60
Runner1 :59
Main Thread:------61
Runner1 :60
Main Thread:------62
Runner1 :61
Main Thread:------63
Runner1 :62
Main Thread:------64
Runner1 :63
Main Thread:------65
Runner1 :64
Main Thread:------66
Runner1 :65
Main Thread:------67
Runner1 :66
Main Thread:------68
Runner1 :67
Main Thread:------69
Runner1 :68
Main Thread:------70
Runner1 :69
Main Thread:------71
Runner1 :70
Main Thread:------72
Runner1 :71
Main Thread:------73
Runner1 :72
Main Thread:------74
Runner1 :73
Main Thread:------75
Runner1 :74
Main Thread:------76
Runner1 :75
Main Thread:------77
Runner1 :76
Main Thread:------78
Runner1 :77
Main Thread:------79
Runner1 :78
Main Thread:------80
Runner1 :79
Main Thread:------81
Runner1 :80
Main Thread:------82
Runner1 :81
Main Thread:------83
Runner1 :82
Main Thread:------84
Runner1 :83
Main Thread:------85
Runner1 :84
Main Thread:------86
Runner1 :85
Main Thread:------87
Runner1 :86
Main Thread:------88
Runner1 :87
Main Thread:------89
Runner1 :88
Main Thread:------90
Runner1 :89
Main Thread:------91
Runner1 :90
Main Thread:------92
Runner1 :91
Main Thread:------93
Main Thread:------94
Runner1 :92
Main Thread:------95
Runner1 :93
Main Thread:------96
Runner1 :94
Main Thread:------97
Runner1 :95
Main Thread:------98
Runner1 :96
Main Thread:------99
Runner1 :97
Runner1 :98
Runner1 :99

F:\java\Thread>

 推荐使用实现Runnable接口实现一个线程，继承Thread的方法写的比较死。