NetSendGUI

import javax.swing.*;
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.text.*;
import java.util.regex.*;

/****/
public class NetSendGUI extends JFrame implements ActionListener{
	/****/
	private JComboBox to = new JComboBox();
	private JTextArea message = new JTextArea(10,30);
	private JButton btnRefresh = new JButton("Refresh");
	private JButton btnSend = new JButton("Send");
	private JLabel lblStatus = new JLabel();
	
	
	/* remove trailing whitespace */
    public static String rtrim(String source) {
        return source.replaceAll("\s+$", "");
    }
    
    public void showException(Exception e){
    	JOptionPane.showMessageDialog(null,e.toString());
	}
    
	/****/
	public void loadTo(){
	//
	setTitle("NetSendGUI by HLINO");	
		
	//clean
	to.removeAll();
	    try {
	        // Execute command
	        String command = "cmd /c net view";
	        Process child = Runtime.getRuntime().exec(command);
	    
	        // Get the input stream and read from it
	        InputStream in = child.getInputStream();
	        int c;
	        String line = new String();
	        //
	        while ((c = in.read()) != -1) {
	        	//enter
		        if((char)c == '\n'){
	        		//startsWith
	        		if(line.indexOf("\") != -1){
		        		rtrim(line);
		        		line = line.replaceAll("\n","");
		        		line = line.replace("\","");
	        			to.addItem(line); 
        			}
        			//
        			line = "";
	        	}
	        	//
	            line = line + (char)c;
	         }
	        in.close();
	    } catch (IOException e) {
		    showException(e);
	    }
	}
	
	/****/
	public String netSend(){
    String line = new String();
		try{		
			String ip = to.getSelectedItem().toString();
	        String command = "cmd /c net send " + ip + " \"" +  message.getText() +"\"";
	        System.out.println(command);
	        Process child = Runtime.getRuntime().exec(command);

	        // Get the input stream and read from it
	        InputStream in = child.getInputStream();
	        int c;
	        //
	        while ((c = in.read()) != -1) {
	        	//
	            line = line + (char)c;
	         }
	        in.close();
	        
		}catch(IOException e){
			showException(e);
		}
	return line;
    }
	
    /****/
	public NetSendGUI(){
		//
		setLayout( new BorderLayout() );
		//
		add(to, BorderLayout.NORTH);
		add(new JScrollPane(message), BorderLayout.CENTER);
		JPanel pSouth = new JPanel();
		pSouth.setLayout( new BorderLayout() );
		
			JPanel pButton = new JPanel();
			//
			pButton.add(btnRefresh);
			pButton.add(btnSend);
			//
			btnSend.setMnemonic('s');
			btnRefresh.setMnemonic('r');
		
		pSouth.add(lblStatus, BorderLayout.NORTH);
		pSouth.add(pButton, BorderLayout.CENTER);
			
		//
		add(pSouth, BorderLayout.SOUTH);
		//
		loadTo();
		//
		to.addActionListener(this);		
		btnRefresh.addActionListener(this);
		btnSend.addActionListener(this);
		//
		setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
		//pack
		pack();
		//center
		setLocationRelativeTo(null);
		//visible
		setVisible(true);
	}
	
	/****/
	public void refresh(){
		loadTo();
		this.lblStatus.setText("");
		this.to.requestFocus(true);
	}
	
	/**
	  * @param message
	  **/
	public void setStatus(String message){
		Date d = new Date();
		SimpleDateFormat sdf = new SimpleDateFormat ("HH:mm:ss");

		this.lblStatus.setText( "[" + sdf.format( d ) + "] : " + message);
	}
	
	/**
	  * @param e
	  **/
	public void actionPerformed(ActionEvent e){
		if(e.getSource() == to){
			message.requestFocus(true);
		}
		else if(e.getSource() == btnSend){
			String sReturn = netSend();
			setStatus(sReturn);
			message.requestFocus(true);
			
		}
		else if(e.getSource() == btnRefresh){
			refresh();
		}	
	}
	/**
	  * @param args
	  **/
	public static void main(String args[]){
		//
		new NetSendGUI();
	}
}