创建线程的四种方式

 

gistfile1.txt

/**

*通过Executors.newFixedThreadPool(5)创建线程池的方法创建线程

**/

import java.util.Date;

import java.util.concurrent.Executor;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

public class Test {

public static void main(String[] args) {

/**

* 创建线程数为5的线程池

*/

ExecutorService executorService = Executors.newFixedThreadPool( 5);

executorService.submit( new MyTask());

executorService.shutdown();

}

private static MyTask extracted() {

return new MyTask();

}

}

class MyTask implements Runnable{

@Override

public void run() {

while( true) {

Date date = new Date();

System.out.println(date);

try {

Thread.sleep( 1000);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

}

gistfile2.txt

/**

*通过实现Runnable接口创建线程

*/

class Time implements Runnable {

SimpleDateFormat simpleDateFormat = new SimpleDateFormat( "yyyy年mm月dd日 HH:MM:ss");

Date date = new Date();

/**

* run方法是线程运行时候调用的方法，run方法结束之后，线程通常就终止了或者死亡了。

*/

@Override

public void run() {

while ( true) {

String str = simpleDateFormat.format( date);

System.out.println(Thread.currentThread().getName()+ ":"+ str);

try {

Thread.sleep( 2000);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

}

gistfile3.txt

/**

*通过继承Thread类并且重写run方法创建线程

*/

class TimeThread extends Thread {

SimpleDateFormat simpleDateFormat = new SimpleDateFormat( "yyyy/mm/dd HH:MM:ss");

Date date = new Date();

@Override

public void run() {

while ( true) {

String str = simpleDateFormat.format(date);

System.out.println( Thread.currentThread().getName()+ ":"+str);

try {

Thread.sleep( 2000);

} catch ( InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

}

gistfile4.txt

/**

* 通过Executors.newSingleThreadExecutor()创建单一线程池，创建线程

*/

import java.util.Date;

import java.util.concurrent.Executor;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

public class Test {

public static void main(String[] args) {

/**

* 创建单一线程的线程池

*/

ExecutorService executorService2 = Executors.newSingleThreadExecutor();

executorService2.submit( new MyTask());

executorService2.shutdown();

}

private static MyTask extracted() {

return new MyTask();

}

}

class MyTask implements Runnable{

@Override

public void run() {

while( true) {

Date date = new Date();

System.out.println(date);

try {

Thread.sleep( 1000);

} catch (InterruptedException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

}