Java Socket 测试本机使用的端口

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Java代码

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！");
}
}

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

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();
}
}