多线程代码(与ppt配套).doc

例 7-1 ThreadDemo.javapublic class ThreadDemopublic static void main(String args)Read read;Write write;read=new Read();/ 创建线程。write=new Write();read.start(); / 线程开始运行后，Read类中的run方法将被自动执行。write.start();class Read extends Threadpublic void run()for(int i=1;i=5;i+)System.out.print(R);trysleep(500);catch(InterruptedException e)class Write extends Threadpublic void run()for(int i=1;i=5;i+)System.out.print(W);trysleep(300);catch(InterruptedException e)例 7-2 RunnableDemo.javapublic class RunnableDemopublic static void main(String args)Read read;Write write;read=new Read();/ 创建Runnable对象write=new Write();new Thread(read).start(); / 线程开始运行后，Read类中的run方法被自动执行new Thread(write).start();class Read implements Runnablepublic void run()for(int i=1;i=5;i+)System.out.print(R);tryThread.sleep(500);catch(InterruptedException e)class Write implements Runnablepublic void run()for(int i=1;i=5;i+)System.out.print(W);tryThread.sleep(300);catch(InterruptedException e)例 7-3 StopBoolean.javapublic class StopBoolean extends Threadprotected boolean done=false;public void run()while(!done)System.out.println(StopBoolean running);trysleep(720);catch(InterruptedException ex)/ nothing to doSystem.out.println(StopBoolean finished.);public static void main(String args)StopBoolean st=new StopBoolean();st.start();tryThread.sleep(5000);catch(InterruptedException e)e.printStackTrace();st.done=true;例 7-4 HiLoPri.javaclass clicker implements Runnablelong click=0;Thread t;private volatile boolean running=true;public clicker(int p)t=new Thread(this);t.setPriority(p);public void run()while(running)click+;public void stop()running=false;public void start()t.start();public class HiLoPripublic static void main(String args)Thread.currentThread().setPriority(Thread.MAX_PRIORITY);clicker hi=new clicker(Thread.NORM_PRIORITY+2);clicker lo=new clicker(Thread.NORM_PRIORITY-2);lo.start();hi.start();tryThread.sleep(10000);catch(InterruptedException e)System.out.println(Main thread interrupted.);lo.stop();hi.stop();tryhi.t.join();lo.t.join();catch(InterruptedException e)System.out.println(InterruptedException caught);System.out.println(Low-priority thread: +lo.click);System.out.println(High-priority thread: +hi.click);例 7-5 CountNoSyn.javapublic class CountNoSyn implements Runnableint i=0;public void count()i+;System.out.println(Thread.currentThread().getName()+ +i);tryThread.sleep(1000);i+;catch(Exception e)System.out.println(Thread.currentThread().getName()+ +i);public void run()count();public static void main(String args)CountNoSyn c=new CountNoSyn();new Thread(c).start();new Thread(c).start();例 7-6 Count.javapublic class Count implements Runnableint i=0;synchronized public void count()i+;System.out.println(Thread.currentThread().getName()+ +i);tryThread.sleep(1000);i+;catch(Exception e)System.out.println(Thread.currentThread().getName()+ +i);public void run()count();public static void main(String args)Count c=new Count();new Thread(c).start();new Thread(c).start();例 7-7 Count.javapublic class Count implements Runnableint i=0;public void count()synchronized(this)i+;System.out.println(Thread.currentThread().getName()+ +i);tryThread.sleep(1000);i+;catch(Exception e)System.out.println(Thread.currentThread().getName()+ +i);public void run()count();public static void main(String args)Count c=new Count();new Thread(c).start();new Thread(c).start();例 7-8 Demo.javaclass Sellint fiveLeft=2,tenLeft=0,twentyLeft=0;String s=null;public synchronized void sellTickets(int money)if(money=5) / 如果使用该方法的线程传递的参数是5，就不用等待fiveLeft=fiveLeft+1;s=给您入场卷您的钱正好;System.out.println(s);else if(money=20)while(fiveLeft20)t=0;redPen.clearRect(0,0,38,300);redPen.fillOval(20,(int)(1.0/2*t*t*3.8),16,16);try红色球.sleep(50);catch(InterruptedException e)else if(Thread.currentThread()=兰色球)bluePen.clearRect(38,0,500,300);bluePen.fillOval(38+(int)(16*t),(int)(1.0/2*t*t*3.8),16,16);try兰色球.sleep(50);catch(InterruptedException e)例题 7-2 旋转彩虹import java.applet.*;import java.awt.*;import java.awt.event.*;public class Animation extends Appletint i=0;public void paint(Graphics g)i=(i+2)%360;Color c=new Color(3*i)%255,(7*i)%255,(11*i)%255);g.setColor(c);g.