java线程说明

//获取线程名字
public class Test {
	public static void main(String[] args) {
		System.out.println(Thread.currentThread().getName());
	}
}  
//设置线程名字:
public class MyRunnable implements Runnable{
	@Override
	public void run() {
		System.out.println(Thread.currentThread().getName());
	}
	public static void main(String[] args) {
		MyRunnable r = new MyRunnable();
		Thread t = new Thread(r);
		t.setName("线程名字");
		t.start();
	}
}
//设置线程优先级(注意:以下代码并不能保证t2先出结果)
public class MyRunnable implements Runnable{
	@Override
	public void run() {
		System.out.println(Thread.currentThread().getName());
	}
	public static void main(String[] args) {
		MyRunnable r = new MyRunnable();
		Thread t = new Thread(r);
		Thread t2 = new Thread(r);
		t.setName("线程1");
		t.setName("线程2");
		//范围1-10
		//Thread.MIN_PRIORITY:1
		//Thread.MAX_PRIORITY:10
		//Thread.NORM_PRIORITY:5
		t.setPriority(2);//1-10
		t2.setPriority(3);
		t.start();
		t2.start();
	}
}
//start() run()部分区别
 
 
启动线程用start(),会开起一个新的线程;run()只是在当前线程中执行run中的代码,不会新开线程。
public class MyRunnable implements Runnable{
	@Override
	public void run() {
		System.out.println(Thread.currentThread().getName());
	}
	public static void main(String[] args) {
		MyRunnable r = new MyRunnable();
		Thread t = new Thread(r);
		t.setName("线程A");
		t.run();//main
		t.start();//线程A
	}
}
//yield()
 
 
让线程重新争夺cpu,结果可能依然是当前线程先运行。
//使用线程的2中方法:1继承Thread 2实现Runnable。都需要重写其run方法
 
 
 
 
 
 
 

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转载自blog.csdn.net/yqwang75457/article/details/73477935
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