Java線程基礎(chǔ)操作

線程的常用操作

static int	activeCount() 返回活動線程數(shù)量
static Thread	currentThread() 返回當(dāng)前線程
ClassLoader	getContextClassLoader() 返回類加載器
long	getId() 返回線程的id,每個線程都有唯一的id
String	getName() 返回線程名稱.
int	getPriority() 返回線程優(yōu)先級
Thread.State	getState() 返回線程狀態(tài)
void	interrupt() 中斷線程.
static boolean	interrupted() 判斷線程的中斷狀態(tài)
boolean	isAlive() 判斷線程是否終止
boolean	isDaemon() 是否為守護(hù)線程
boolean	isInterrupted() 判斷線程的中斷狀態(tài)
void	join() 線程合并
void	run()
void	setDaemon(boolean on) 設(shè)置線程為守護(hù)線程
void	setName(String name) 設(shè)置線程名稱
void	setPriority(int newPriority) 設(shè)置優(yōu)先級
static void	sleep(long millis)線程睡眠(休眠)
void	start() 開啟新的線程
void	stop() 線程終止
String	toString()
static void	yield() 線程讓步

package com.wkcto.chapter07.method;
/**
 * 演示線程的基本操作
 * 			Thread.currentThread()		返回當(dāng)前線程
 * 			t1.getName()					返回線程名稱, 線程默認(rèn)名稱 : Thread-0 / Thread-1 
 * 			t1.setName("t1")				設(shè)置線程名稱
 * 			t1.isAlive()					判斷線程是否終止
 * 			Thread.activeCount()			活動線程的數(shù)量
 * @author 蛙課網(wǎng)
 *
 */
public class Test01 {
	public static void main(String[] args) {
		Thread t1 = new Thread( new Runnable() {
			@Override
			public void run() {
				for( int i = 1; i<=100; i++){
//					System.out.println("sub thread: " + i);
					System.out.println( Thread.currentThread().getName() + "==>" + i);
				}
			}
		});	
		t1.setName("t1");
		t1.start();
		
		new Thread( new Runnable() {
			@Override
			public void run() {
				for( int i = 1; i<=100; i++){
					System.out.println( Thread.currentThread().getName() + "====>" + i);
				}
			}
		},  "t2").start();
		
		System.out.println("11 : " +  Thread.activeCount() );  		//活動線程的數(shù)量
		
		//main線程
		for( int i = 1; i<=100; i++){
			System.out.println( Thread.currentThread().getName() + "------->" + i);
		}
		
		System.out.println( "t1 alive: " + t1.isAlive());
		
		System.out.println("22 : " +  Thread.activeCount() );  		//活動線程的數(shù)量
	}
}

package com.wkcto.chapter07.method;
/**
 * 守護(hù)線程
 * 		為其他線程服務(wù)的, 不能單獨運行 , 當(dāng)JVM中只有守護(hù)線程時, JVM退出 
 * @author 蛙課網(wǎng)
 *
 */
public class Test02 {

	public static void main(String[] args) {
		Thread t1 = new Thread(new Runnable() {
			@Override
			public void run() {
				for (int i = 1; i <= 100; i++) {
					System.out.println(Thread.currentThread().getName() + "--> " + i);
				}
			}
		} , "t1");
		t1.start();
		
		Thread t2 = new Thread(new Runnable() {
			@Override
			public void run() {
				for (int i = 1; i <= 500; i++) {
					System.out.println(Thread.currentThread().getName() + "----> " + i);
				}
			}
		} , "t2");
		t2.setDaemon( true ); 		//設(shè)置線程為守護(hù)線程
		t2.start();
		
		//main線程
		for (int i = 1; i <= 100; i++) {
			System.out.println(Thread.currentThread().getName() + "==> " + i);
		}
	}

}

package com.wkcto.chapter07.method;
/**
 * 判斷線程的狀態(tài)
 * @author 蛙課網(wǎng)
 *
 */
public class Test03 {

	public static void main(String[] args) {
		Thread t1 = new Thread(new Runnable() {
			@Override
			public void run() {
				for (int i = 1; i <= 100; i++) {
					System.out.println(Thread.currentThread().getName() + "--> " + i);
				}
			}
		});
		
		System.out.println("111: " + t1.getState());	 //111: NEW 新建狀態(tài),剛剛創(chuàng)建了線程對象	
		t1.start();
		System.out.println("222: " + t1.getState());	//222: RUNNABLE 可運行狀態(tài),就緒狀態(tài), 調(diào)用了start()
		
		//main線程
		for (int i = 1; i <= 300; i++) {
			System.out.println(Thread.currentThread().getName() + "--> " + i);
		}
		
		System.out.println("333: " + t1.getState()); 	//333: TERMINATED 終止?fàn)顟B(tài),線程已結(jié)束	
		
	}

}

線程的生命周期