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  • java.lang.Thread(1)

    Create Thread

    java线程的两种实现方式

             ·继承Thread

             ·实现Runnable接口

     

    1、继承Thread

                      定义语法:

               class classname extends Thread{
                  属性;
                 方法;
                  //覆写Thread类中run()
                public void run(){
             }
               }

      
          例如:
        

               class PrimeThread extends Thread {
                     long minPrime;
                    PrimeThread(long minPrime) {
                      this.minPrime = minPrime;
                      }
                    public void run() {
                   // compute primes larger than minPrime
                  . . .
                    }
                     }

          启动线程:   

                PrimeThread p = new PrimeThread(143);
             p.start();

          详细示例1:

                  View Code
     1 //用继承Thread创建线程
    2 public class CreateThreadExtendsThread02 {
    3 public static void main(String[] args) {
    4 MyThread myA = new MyThread("线程A");
    5 MyThread myB = new MyThread("线程B");
    6 MyThread myC = new MyThread("线程C");
    7 myA.start();
    8 myB.start();
    9 myC.start();
    10 }
    11 }
    12
    13 class MyThread extends Thread{
    14 private String name;
    15 public MyThread(String name){
    16 this.name = name;
    17 }
    18 public void run(){
    19 for(int i=1;i<=20;i++)
    20 System.out.println(i+ " "+this.name);
    21 }
    22 }

          详细示例2

                 View Code
     1 //用继承Thread创建线程
    2 //线程A:打印A 100个
    3 //线程B:打印B 100个
    4 //线程100:打印1-100
    5
    6 public class CreateThreadExtendsThread {
    7 public static void main(String[] args) {
    8 PrintChar pc1 = new PrintChar('A',100);
    9 PrintChar pc2 = new PrintChar('B',100);
    10 PrintNumber pn = new PrintNumber(100);
    11 //创建任务线程
    12 Thread thread1 = new Thread(pc1);
    13 Thread thread2 = new Thread(pc2);
    14 Thread thread3 = new Thread(pn);
    15 //启动线程
    16 thread1.start();
    17 thread2.start();
    18 thread3.start();
    19 }
    20 }
    21
    22 class PrintCharacter extends Thread{
    23 private char ch;
    24 private int number;
    25
    26 public PrintCharacter(char ch,int number){
    27 this.ch = ch;
    28 this.number = number;
    29 }
    30
    31 public void run(){
    32 for(int i=1;i<=number;i++)
    33 System.out.print(" "+ch);
    34 }
    35 }
    36
    37 class PrintNum extends Thread{
    38 private int number;
    39
    40 public PrintNum(int number){
    41 this.number = number;
    42 }
    43
    44 public void run(){
    45 for(int i=1;i<=number;i++)
    46 System.out.print(" "+i);
    47 }
    48 }

    2、实现Runnable接口

          定义一个类,实现Runnable接口,并覆盖 run()方法,在这个方法里是你希望这个线程运行的代码。

          创建一个这个新类的对象。

          创建一个Thread类的对象,用刚才的Runnable对象作为构造函数参数。

          调用Thread对象的start()方法来启动线程。

          定义语法:

                class classname implements Runnable{
                  属性;
                   方法;
                  //覆写Runnable类中run()
                   public void run(){
                         }
                }

          例如:

                class PrimeRun implements Runnable {
                    long minPrime;
                    PrimeRun(long minPrime) {
                    this.minPrime = minPrime;
                    }
                     public void run() {
                     // compute primes larger than minPrime
                       . . .
                     }
              }

          启动线程:

                PrimeRun p = new PrimeRun(143);
              new Thread(p).start();

          详细示例:

                View Code
     1 //用实现Runnable接口创建线程
    2 //线程A:打印A 100个
    3 //线程B:打印B 100个
    4 //线程100:打印1-100
    5 public class CreateThreadImplementRunnable {
    6 public static void main(String[] args) {
    7 //用实现Runnable接口
    8 /*Runnable pc1 = new PrintChar('A',100);
    9 Runnable pc2 = new PrintChar('B',100);
    10 Runnable pn = new PrintNumber(100);
    11 */
    12 PrintChar pc1 = new PrintChar('A',100);
    13 PrintChar pc2 = new PrintChar('B',100);
    14 PrintNumber pn = new PrintNumber(100);
    15
    16 //创建任务线程
    17 Thread thread1 = new Thread(pc1);
    18 Thread thread2 = new Thread(pc2);
    19 Thread thread3 = new Thread(pn);
    20 //启动线程
    21 thread1.start();
    22 thread2.start();
    23 thread3.start();
    24 }
    25 }
    26
    27 class PrintChar implements Runnable{
    28 private char ch;
    29 private int number;
    30
    31 public PrintChar(char ch,int number){
    32 this.ch = ch;
    33 this.number = number;
    34 }
    35
    36 public void run(){
    37 for(int i=1;i<=number;i++)
    38 System.out.print(" "+ch);
    39 }
    40 }
    41
    42 class PrintNumber implements Runnable{
    43 private int number;
    44
    45 public PrintNumber(int number){
    46 this.number = number;
    47 }
    48
    49 public void run(){
    50 for(int i=1;i<=number;i++)
    51 System.out.print(" "+i);
    52 }
    53 }















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  • 原文地址:https://www.cnblogs.com/bchxsx322/p/2421073.html
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