java高级特性，涵盖了多种java常用的一些例子

package com.aaa.Threadday2; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.*; import java.util.concurrent.Callable; import java.util.concurrent.ExecutionException; import java.util.concurrent.FutureTask; public class ThreadTest { public static void main(String[] args) { } } //创建线程的第一种方法：继承Thread类 class ThreadTest01{ public static void main(String[] args) { MyThread01 t = new MyThread01(); t.setName("t"); t.start();//启动线程 for (int i = 0; i < 1000; i++){ System.out.println(Thread.currentThread().getName() + "--->" + i); } } } class MyThread01 extends Thread{ @Override public void run() { for (int i = 0; i < 1000; i++){ System.out.println(Thread.currentThread().getName() + "--->" + i); } } } //创建线程的第二种方法：实现Runnable接口 class ThreadTest02Two{ public static void main(String[] args) { Thread t = new Thread(new MyRunnable01(), "t");//创建线程并设置名字 t.start(); for (int i = 0; i < 1000; i++){ System.out.println(Thread.currentThread().getName() + "--->" + i); } } } // 这并不是一个线程类，是一个可运行的类。它还不是一个线程。 class MyRunnable01 implements Runnable{ @Override public void run() { for (int i = 0; i < 1000; i++){ System.out.println(Thread.currentThread().getName() + "--->" + i); } } } //创建线程的第二种方法：实现Runnable接口（采用匿名内部类） class ThreadTest03Two{ public static void main(String[] args) { //匿名内部类 Thread t = new Thread(new Runnable() { @Override public void run() { for (int i = 0; i < 1000; i++){ System.out.println(Thread.currentThread().getName() + "--->" + i); } } }); t.setName("t"); t.start(); for (int i = 0; i < 1000; i++){ System.out.println(Thread.currentThread().getName() + "--->" + i); } } } /** * Thread.currentThread()获取当前线程对象（静态方法） * 线程.getName()获取当前线程名字 * 线程.setName()设置当前线程名字 */ class ThreadTest04Two{ public static void main(String[] args) { System.out.println(Thread.currentThread().getName());//当前线程名字 main MyThread01 t1 = new MyThread01(); MyThread01 t2 = new MyThread01(); t1.setName("t1"); t2.setName("t2"); t1.start(); t2.start(); for (int i = 0; i < 1000; i++){ System.out.println(Thread.currentThread().getName() + "--->" + i); } } } //sleep(long millis)（静态方法） class ThreadTest05{ public static void main(String[] args) { for (int i = 0; i < 10; i++){ try { Thread.sleep(1000);//睡眠1s } catch (InterruptedException e) { e.printStackTrace(); } System.out.println(Thread.currentThread().getName() + "--->" + i); } } } //interrupt()中断正在睡眠的线程（不推荐使用，了解即可） class ThreadTest06Two { public static void main(String[] args) { MyThread02 t = new MyThread02(); t.setName("t"); t.start(); try { Thread.sleep(1000 * 5); } catch (InterruptedException e) { e.printStackTrace(); } System.out.println("hello world"); t.interrupt(); } } class MyThread02 extends Thread{ @Override public void run() { System.out.println(Thread.currentThread().getName() + "--->begin" ); try { Thread.sleep(1000 * 60 * 60 * 24 * 365);//睡一年 } catch (InterruptedException e) { e.printStackTrace(); } System.out.println(Thread.currentThread().getName() + "--->end" ); } } //stop()终止一个线程执行（不推荐使用，可能导致数据丢失） class ThreadTest07{ public static void main(String[] args) { MyThread03 t = new MyThread03(); t.setName("t"); t.start(); try { Thread.sleep(1000 * 5); } catch (InterruptedException e) { e.printStackTrace(); } t.stop(); } } class MyThread03 extends Thread{ @Override public void run() { for (int i = 0; i < 100; i++){ System.out.println(Thread.currentThread().getName() + "--->" + i); try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } } } } //合理终止一个线程：设置一个标记 class ThreadTest08Two{ public static void main(String[] args) { MyThread04 t = new MyThread04(); t.setName("t"); t.start(); try { Thread.sleep(1000 * 9); } catch (InterruptedException e) { e.printStackTrace(); } System.out.println("hello world"); // 终止线程 // 你想要什么时候终止t的执行，那么你把标记修改为false，就结束了。 t.flag = true; } } class MyThread04 extends Thread{ boolean flag = false; @Override public void run() { if (this.flag){ return ; } for (int i = 0; i < 1000; i++){ if (this.flag){//由于一个线程一直运行此程序，要是判断在外面只会在启动线程时判断并不会结束， // 因此需要每次循环判断一下标记。 /** * 这里可以保存东西 */ return ; } System.out.println(Thread.currentThread().getName() + "--->" + i); try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } } } } /*//MyThread04另一种写法 class MyThread04 extends Thread{ boolean flag = false; @Override public void run() { for (int i = 0; i < 1000; i++){ if (!this.flag){ System.out.println(Thread.currentThread().getName() + "--->" + i); try { Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } }else{ return; } } } }*/ /**关于线程的优先级 *getPriority()获得线程优先级 *setPriority()设置线程优先级 */ class ThreadTest09Two{ public static void main(String[] args) { System.out.println("最高优先级：" + Thread.MAX_PRIORITY);//最高优先级：10 System.out.println("最低优先级:" + Thread.MIN_PRIORITY);//最低优先级:1 System.out.println("默认优先级:" + Thread.NORM_PRIORITY);//默认优先级:5 MyThread01 t1 = new MyThread01(); MyThread01 t2 = new MyThread01(); MyThread01 t3 = new MyThread01(); t1.setName("t1"); t2.setName("t2"); t3.setName("t3"); t1.setPriority(Thread.MAX_PRIORITY); t2.setPriority(Thread.MIN_PRIORITY); t3.setPriority(Thread.NORM_PRIORITY); t1.start(); t2.start(); t3.start(); try { Thread.sleep(1000 * 5); } catch (InterruptedException e) { e.printStackTrace(); } System.out.println("t1的优先级：" + t1.getPriority());//t1的优先级：10