1. 程式人生 > >Java 執行緒池建立 理解(簡單)(只要反覆理解,就能理解)

Java 執行緒池建立 理解(簡單)(只要反覆理解,就能理解)

import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; public class cachethreadpool {     public static void main (String[] args) {         ExecutorService es = Executors.newFixedThreadPool(3);         Prints pts = new Prints(1);         Prints2 pts2 = new Prints2(2);         while (true) {             es.execute(pts);             es.execute(pts2);         }         /*Prints pts = new Prints(1);         pts.run();*/     } } class Prints implements Runnable {     int thnum;     public Prints(int thnum) {         this.thnum = thnum;     }     public void run() {         Long time;         Long time2;         Long time3;         time = System.currentTimeMillis
();         for (int i = 0; i < 20; i++) {             try {                 System.out.println("執行緒" + thnum + " NO." + i);                 Thread.sleep(1000);             } catch (InterruptedException e) {                 e.printStackTrace();             }         }         time2 = System.currentTimeMillis
();         time3 = time2 - time;         System.out.println(time3);     } } class Prints2 implements Runnable {     int thnum;     public Prints2(int thnum) {         this.thnum = thnum;     }     public void run() {         Long time;         Long time2;         Long time3;         time = System.currentTimeMillis
();         for (int i = 0; i < 20; i++) {             try {                 System.out.println("執行緒" + thnum + " NO." + i);                 Thread.sleep(1000);             } catch (InterruptedException e) {                 e.printStackTrace();             }         }         time2 = System.currentTimeMillis();         time3 = time2 - time;         System.out.println(time3);     } }