zoukankan      html  css  js  c++  java
  • java例程练习(多线程[线程的优先级等等])

    //设置线程的优先级
    public class TestThread1 {
    	public static void main(String[] args) {
    		Thread t1 = new Thread(new T1());
    		Thread t2 = new Thread(new T2());
    		t1.setPriority(Thread.NORM_PRIORITY + 3);
    		t1.start();
    		t2.start();
    	}
    
    
    }
    
    class T1 implements Runnable {
    	public void run() {
    		for(int i = 0; i < 1000; i++) {
    			System.out.println("--------T1: " + i);
    		}
    	}
    }
    
    class T2 implements Runnable {
    	public void run() {
    		for(int i = 0; i < 1000; i++) {
    			System.out.println("========T2: " + i);
    		}
    	}
    }
    //同样的线程对象可以用来起多个线程
    public class TestThread2 {
        public static void main(String[] args) {
        	Runner2 r = new Runner2();
        	Thread t1 = new Thread(r);
        	Thread t2 = new Thread(r);
        	t1.start();
        	t2.start();
        }
    }
    
    class Runner2 implements Runnable {
    	public void run() {
    		for(int i = 0; i < 30; i++) {
    			System.out.println("NO. " + i);
    		}
    	}
    }

    //sleep()方法
    public class TestThread3 {
    	public static void main(String[] args) {
    		Runner3 r = new Runner3();
    		Thread t = new Thread(r);
    		t.start();
    	}
    }
    
    class Runner3 implements Runnable {
    	public void run() {
    		for(int i = 0; i < 30; i++) {
    			if(i % 10 == 0 && i != 10) {
    				try {
    					Thread.sleep(1000);
    				} catch(InterruptedException e) {}
    				System.out.println("NO. " + i);
    			}
    		}
    	}
    }

    public class TestThread4 {
    	public static void main(String[] args) {
    		Runner4 r = new Runner4();
    		Thread t = new Thread(r);
    		t.start();
    
    		for(int i = 0; i < 100000; i++) {
    			if(i % 1000 == 0 & i > 0) {
    				System.out.println("In Thread main i = " + i);
    			}
    		}
    		System.out.println("Thread Main is Over");
    		r.shutDown();
    	}
    
    }
    
    class Runner4 implements Runnable {
    	private boolean flag = true;//最好的使线程终止的方法
    
    	public void run() {
    		int i = 0;
    		while(flag == true) {
    			System.out.print(" " + i++);
    		}
    	}
    
    	public void shutDown() {
    		flag = false;
    	}
    }

    //复习join()方法;
    public class TestThread5 {
    	public static void main(String[] args) {
    		Runner5 r = new Runner5();
    		Thread t = new Thread(r);
    		t.start();
    
    		try {
    			t.join();
    		} catch(InterruptedException e) {}
    
    		for(int i = 0; i < 50; i ++) {
    			System.out.println("MainThread: " + i);
    		}
    
    	}
    
    }
    
    class Runner5 implements Runnable {
    	public void run() {
    		for(int i = 0; i < 50; i++) {
    			System.out.println("SubThread: " + i);
    		}
    	}
    }

    public class TestThread6 {
    	public static void main(String[] args) {
    		Thread t = new Runner6();
    		t.start();
    
    		for(int i = 0; i < 50; i++) {
    			System.out.println("MainThread: " + i);
    		}
    	}
    }
    
    class Runner6 extends Thread {
    	public void run() {
    		//拿到当前线程判断是不是还活着Thread.currentThread(),isAlive()
    		System.out.println(Thread.currentThread().isAlive());
    		for(int i = 0; i < 50; i++) {
    			System.out.println("SubThread: " + i);
    		}
    	}
    }


  • 相关阅读:
    【SQL Server性能优化】SQL Server 2008之表压缩
    SQL Server 锁的排队机制
    通过DAC来连接SQL Server
    通过SQL Server的数据库邮件功能功能发送邮件
    【SQL 编程你也行】BOM按节点排序
    【SQL Server数据迁移】32位的机器:SQL Server中查询ORACLE的数据
    《女孩梦三十》
    在论坛中出现的比较难的sql问题:26(动态行专列+合并字符串、补足行数)
    【SQL Server高可用性】数据库镜像:同一台机器的两个不同实例上配置数据库镜像 + 另一台见证服务器
    【SQL Server高可用性】数据库复制:修改表结构、新增表、新增存储过程 会被复制到订阅服务器?
  • 原文地址:https://www.cnblogs.com/wjchang/p/3671692.html
Copyright © 2011-2022 走看看