networked computer names to be displayed in jlist

How to retrieve or gathered all computer names from a networked place ? I need some guide or sample code on ho开发者_运维问答w to start from scratch.

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in simplest form run loop over ip range
execute command nslookup

import java.io.*;  
public class TestExec {  
    public static void main(String[] args) {  
        try {  
            Process p = Runtime.getRuntime().exec("nslookup xx.xx.xx.xx ");  
            BufferedReader in = new BufferedReader(  
                                new InputStreamReader(p.getInputStream()));  
            String line = null;  
            while ((line = in.readLine()) != null) {  
                System.out.println(line);  
            }  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
    }  
}  

and parse response