java的工作移交

     处理一个问题的时候想要更快一些，或者说我们想要响应时间更快一些，那么当我们顺序执行某些调用的时候可以将这些调用分布线程并发去做，会快很多！

       这是一种异步操作！所以无法等待返回值的

package threadtest1;

public class Main {
	public static void main(String[] agrs){
		System.out.println("main BEGIN");
		Host host = new Host();
		host.request(10, 'A');
		host.request(20, 'B');
		host.request(30, 'C');
		System.out.println("main END");
	}

}

 

package threadtest1;
public class Host {
	private final Helper helper = new Helper();
	public void request(final int count, final char c){
		System.out.println("   request(" + count +"," + c +") BEGIN");
		new Thread(){
			public void run(){
				helper.handle(count, c);
				}
		}.start();
		System.out.println("   request(" + count +"," + c +") BEGIN");
	}
}

 

package threadtest1;

public class Helper {
	public void handle(int count, char c){
		System.out.println("   handle(" + count +"," + c +") BEGIN");
		for(int i = 0; i <count; i++){
			slowly();
			System.out.print(c);
		}
		System.out.println("");
		System.out.println("   handle(" + count +"," + c +") BEGIN");
	}
	
	private void slowly(){
		try{
			Thread.sleep(100);
		}catch(InterruptedException e){
			
		}
	}
}