import java.io.IOException; 

 import java.net.InetAddress; 

 import java.net.Socket; 

 import java.net.UnknownHostException; 


 public class sampletest 

 { 

 public static void main(String[] args) 

 { 

 for(int i=1;i<256;i++) 

 { 

 try 

 { 

 InetAddress localHost=InetAddress.getLocalHost(); 

 Socket socket=new Socket(localHost,i); 

 System.out.println("本机已经使用了端口："+i); 

 } 

 catch(UnknownHostException e) 

 { 

 //e.printStackTrace(); 

 } 

 catch(IOException e) 

 { 

 // e.printStackTrace(); 

 } 

 } 

 System.out.println("执行完毕！"); 

 } 

 } 


[java] view plaincopy 


 import java.io.IOException; 

 import java.net.InetAddress; 

 import java.net.Socket; 

 import java.net.UnknownHostException; 


 public class sampletest 

 { 

 public static void main(String[] args) 

 { 

 for(int i=1;i<256;i++) 

 { 

 try 

 { 

 InetAddress localHost=InetAddress.getLocalHost(); 

 Socket socket=new Socket(localHost,i); 

 System.out.println("本机已经使用了端口："+i); 

 } 

 catch(UnknownHostException e) 

 { 

 //e.printStackTrace(); 

 } 

 catch(IOException e) 

 { 

 // e.printStackTrace(); 

 } 

 } 

 System.out.println("执行完毕！"); 

 } 

 } 



Java代码 复制代码 


 import java.io.IOException; 

 import java.net.InetAddress; 

 import java.net.Socket; 

 import java.net.UnknownHostException; 


 public class sampletest implements Runnable 

 { 

 public sampletest(){ 


 } 

 public void searchPort(){ 

 System.out.println("本机已经使用了端口："); 

 for(int i=1;i<256;i++) 

 { 

 try 

 { 

 InetAddress localHost=InetAddress.getLocalHost(); 

 Socket socket=new Socket(localHost,i); 

 System.out.print(" "+i+":使用"); 

 } 

 catch(UnknownHostException e) 

 { 

 //e.printStackTrace(); 

 } 

 catch(IOException e) 

 { 

 System.out.print(" "+i+":空闲"); 

 // e.printStackTrace(); 

 } 

 } 

 System.out.println("执行完毕！"); 


 } 

 public void run() { 

 for(;;){ 

 try { 

 Thread.sleep(3000); 

 this.searchPort(); 

 } catch (InterruptedException e) { 

 // TODO Auto-generated catch block 

 e.printStackTrace(); 

 } 

 } 

 // TODO Auto-generated method stub 


 } 

 public static void main(String[] args){ 

 Runnable rb = new sampletest(); 

 new Thread(rb).start(); 

 } 

 }