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  Java Concurrency - multiple threads of HelloWorld
  Add Date : 2018-11-21      
  In two ways: First, to achieve Runnable interface; Second, the basis Thread class.

First, to achieve Runnable interface

package com.tgb.klx.thread;

public class hello1 implements Runnable {

 public hello1 () {


 public hello1 (String name) {
  this.name = name;

 public void run () {
  for (int i = 0; i < 5; i ++) {
   System.out.println (name + "Run" + i);

 public static void main (String [] args) {
  hello1 h1 = new hello1 ( "Thread A");
  Thread demo1 = new Thread (h1);
  hello1 h2 = new hello1 ( "thread B");
  Thread demo2 = new Thread (h2);
  demo1.start ();
  demo2.start ();

 private String name;


Second, based on the Thread class

package com.tgb.klx.thread;
public class hello2 extends Thread {

 public hello2 () {


 public hello2 (String name) {
  this.name = name;

 public void run () {
  for (int i = 0; i < 5; i ++) {
   System.out.println (name + "Run" + i);

 public static void main (String [] args) {
  hello2 h1 = new hello2 ( "A");
  hello2 h2 = new hello2 ( "B");
  h1.start ();
  h2.start ();

 private String name;

Examples of ways to achieve Runnable interface, you need to create a Thread class will realize runnable class as a parameter in, start a thread, if called directly runnable's run method calls with no distinction between ordinary class methods, does not create a new thread .

Thread class implements Runnable interface, Thread class also has run method call Thread's run method also does not create a new thread and call an ordinary method no difference, so when we must pay attention to the use of multiple threads.

to sum up:

These two methods can achieve, the specific choice of which way the decision according to the situation. Inside java does not support multiple inheritance, so to achieve runnable interface may be a little more flexible way.
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