字符串交替打印 操作方法

  1 package cn.itcast.servlet;
  2 
  3 import java.util.concurrent.LinkedBlockingQueue;
  4 import java.util.concurrent.locks.Condition;
  5 import java.util.concurrent.locks.Lock;
  6 import java.util.concurrent.locks.ReentrantLock;
  7 
  8 
  9 interface StringTurn
 10 {
 11     public void print1();
 12     public void print2();
 13     
 14 }
 15 /**
 16  *    交替打印字符串
 17  */
 18 class StringTurnPrint implements StringTurn
 19 {
 20     private int i=0;
 21     private String str="i want to fly";
 22     private Object mutex=new Object();
 23     private boolean flag=true;
 24     public void print1()
 25     {
 26         synchronized(mutex)
 27         {
 28             while(i<str.length())
 29             {
 30                 if(flag==false)
 31                 {
 32                     try {
 33                         mutex.wait();
 34                     } catch (InterruptedException e) {
 35                         e.printStackTrace();
 36                     }
 37                 }
 38                 flag=false;
 39                 if(i>=str.length())
 40                     return;
 41                 System.out.println(Thread.currentThread().getName() +"  print "+ str.charAt(i));
 42                 i++;
 43                 mutex.notify();
 44             }
 45         }
 46     }
 47     public void print2()
 48     {
 49         synchronized(mutex)
 50         {
 51             while(i<str.length())
 52             {
 53                 if(flag==true)
 54                 {
 55                     try {
 56                         mutex.wait();
 57                     } catch (InterruptedException e) {
 58                         e.printStackTrace();
 59                     }
 60                 }
 61                 flag=true;
 62                 if(i>=str.length())
 63                     return;
 64                 System.out.println(Thread.currentThread().getName() +"  print "+ str.charAt(i));
 65                 i++;
 66                 mutex.notify();
 67             }
 68         }
 69     }
 70 }
 71 
 72 class StringTurnPrint2 implements StringTurn
 73 {
 74     Lock lock=new ReentrantLock();
 75     boolean flag=true;
 76     private String str="i want to fly";
 77     int i=0;
 78     Condition con1=lock.newCondition();
 79     Condition con2=lock.newCondition();
 80     
 81     public void print1()
 82     {
 83         lock.lock();
 84         while(i<str.length())
 85         {
 86             if(flag==false)
 87             {
 88                 try {
 89                     con1.await();
 90                 } catch (InterruptedException e) {
 91                     e.printStackTrace();
 92                 }
 93             }
 94             flag=false;
 95             if(i>=str.length())
 96                 return;
 97             System.out.println(Thread.currentThread().getName() +"  print "+ str.charAt(i));
 98             i++;
 99             con2.signal();
100         }
101         lock.unlock();
102     }
103     
104     public void print2()
105     {
106         lock.lock();
107         while(i<str.length())
108         {
109             if(flag==true)
110             {
111                 try {
112                     con2.await();
113                 } catch (InterruptedException e) {
114                     e.printStackTrace();
115                 }
116             }
117             flag=true;
118             if(i>=str.length())
119                 return;
120             System.out.println(Thread.currentThread().getName() +"  print "+ str.charAt(i));
121             i++;
122             con1.signal();
123         }
124         lock.unlock();
125     }
126 }
127 
128 class Thread1 extends Thread
129 {
130     StringTurn stringTurnPrint;
131     Thread1(StringTurn s)
132     {
133         stringTurnPrint=s;
134         this.setName("thread1");
135     }
136     @Override
137     public void run() {
138         this.stringTurnPrint.print1();
139     }
140 }
141 class Thread2 extends Thread
142 {
143     StringTurn stringTurnPrint;
144     Thread2(StringTurn s)
145     {
146         stringTurnPrint=s;
147         this.setName("thread2");
148     }
149     @Override
150     public void run() {
151         this.stringTurnPrint.print2();
152     }
153 }
154 public class ThreadMain {
155     public static void main(String[] args) {
156         StringTurn s=new StringTurnPrint();
157         StringTurn s2=new StringTurnPrint2();
158         Thread1 t1=new Thread1(s2);
159         Thread2 t2=new Thread2(s2);
160         t1.start();
161         t2.start();
162         
163         
164         // 建立一个阻塞队列
165     }
166 }

  1 package cn.itcast.servlet;
  2 
  3 import java.io.IOException;
  4 import java.io.PipedInputStream;
  5 import java.io.PipedOutputStream;
  6 
  7 class StringTurnPrint
  8 {
  9     String str="i want to fly";
 10     int i=-1;
 11     public Character getChar()
 12     {
 13         i++;
 14         if(i>=str.length())
 15             return (Character) null;
 16         char ch=str.charAt(i);
 17         return ch;
 18     }
 19 }
 20 
 21 class Thread1 extends Thread
 22 {
 23     PipedInputStream pipedInputStream;
 24     PipedOutputStream pipedOutputStream;
 25     StringTurnPrint stringTurnPrint;
 26     public Thread1(StringTurnPrint stringTurnPrint,PipedInputStream pipedInputStream,PipedOutputStream pipedOutputStream) {
 27         this.stringTurnPrint=stringTurnPrint; 
 28         this.pipedInputStream=pipedInputStream;
 29         this.pipedOutputStream=pipedOutputStream;
 30         this.setName("thread1");
 31     }
 32     @Override
 33     public void run() {
 34         try {
 35             while(true)
 36             {
 37                 Character ch=stringTurnPrint.getChar();
 38                 if(ch==null)
 39                 {
 40                     pipedInputStream.close();
 41                     pipedOutputStream.close();
 42                     return ;
 43                 }
 44                 pipedOutputStream.write(ch);
 45                 pipedOutputStream.flush();
 46                 int r=pipedInputStream.read();
 47                 System.out.println(Thread.currentThread().getName() + "  print  :"+(char)r);
 48             }
 49         } catch (IOException e) {
 50             e.printStackTrace();
 51         }
 52     }    
 53 }
 54 class Thread2 extends Thread
 55 {
 56     PipedInputStream pipedInputStream;
 57     PipedOutputStream pipedOutputStream;
 58     StringTurnPrint stringTurnPrint;
 59     public Thread2(    StringTurnPrint stringTurnPrint,PipedInputStream pipedInputStream,PipedOutputStream pipedOutputStream) {
 60         this.stringTurnPrint=stringTurnPrint; 
 61         this.pipedInputStream=pipedInputStream;
 62         this.pipedOutputStream=pipedOutputStream;
 63         this.setName("thread2");
 64     }
 65     @Override
 66     public void run() {
 67         try {
 68             while(true)
 69             {
 70                 
 71                 
 72                 int r=pipedInputStream.read();
 73                 System.out.println(Thread.currentThread().getName() + "  print  :"+(char)r);
 74                 
 75                 Character ch=stringTurnPrint.getChar();
 76                 if(ch==null)
 77                 {
 78                     pipedInputStream.close();
 79                     pipedOutputStream.close();
 80                     return ;
 81                 }
 82                 pipedOutputStream.write(ch);
 83                 pipedOutputStream.flush();
 84 
 85             }
 86         } catch (IOException e) {
 87             e.printStackTrace();
 88         }
 89     }
 90 }
 91 public class ThreadPiped {
 92 
 93     public static void main(String[] args) throws IOException {
 94         PipedInputStream pipedInputStream=new PipedInputStream();
 95         PipedOutputStream  pipedOutputStream=new PipedOutputStream();
 96         PipedInputStream pipedInputStream2=new PipedInputStream();
 97         PipedOutputStream  pipedOutputStream2=new PipedOutputStream();
 98     
 99         pipedInputStream.connect(pipedOutputStream2);
100         pipedOutputStream.connect(pipedInputStream2);
101         
102         StringTurnPrint stringTurnPrint=new StringTurnPrint();
103         new Thread1(stringTurnPrint, pipedInputStream, pipedOutputStream).start();
104         new Thread2(stringTurnPrint, pipedInputStream2, pipedOutputStream2).start();
105         
106 
107     }
108 
109 }