Robot API and Color API

Question

I have been writing this program for a while now. In its current incarnation it has been pulling up several errors consistently.
First, is there any way I can use the String boing = myRobot.getPixelColor(x, y).toString(); line that is commented out? Whenever I enter data it throws a null pointer exception.
Second, why is it putting 25 into the temp[ ] array instead of 255? It places 255 into the first slot but 25 in the second and third slot. What can I do to pull the whole number out of the string.
Thank you. Any help that can be given is very much appreciated.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.image.*;
import java.awt.Robot;
import java.awt.Color;
public class GetColor extends JFrame implements ActionListener
         JButton submit = new JButton("Submit");
         JTextField xcoor = new JTextField(5);
         JTextField ycoor = new JTextField(5);
         JLabel xlbl = new JLabel("X coordinate: ");
         JLabel ylbl = new JLabel("Y coordinate: ");
         JLabel hxlbl = new JLabel("Hexadecimal value: ");
         JPanel panA = new JPanel();
         JPanel panB = new JPanel();
         JPanel panC = new JPanel();
         JPanel panD = new JPanel();
         JTextField hex = new JTextField(25);
         Robot myRobot;
  public GetColor()
         getContentPane().setLayout(
              new BoxLayout(getContentPane(), BoxLayout.Y_AXIS ));
         panA.add(xlbl);
         panA.add(xcoor);
         panB.add(ylbl);
         panB.add(ycoor);
         panC.add(hxlbl);
         panC.add(hex);
         panD.add(submit);
         getContentPane().setLayout(
              new BoxLayout( getContentPane(), BoxLayout.Y_AXIS ));
         getContentPane().add(panA);
         getContentPane().add(panB);
         getContentPane().add(panC);
         getContentPane().add(panD);
         submit.addActionListener(this);
         submit.setActionCommand("Submit");
         hex.setEditable(false);
  public void actionPerformed(ActionEvent evt)
         String userInA, userInB;
         int x, y;
         userInA = xcoor.getText();
         x = Integer.parseInt(userInA);
         userInB = ycoor.getText();
         y = Integer.parseInt(userInB);
         int rgb[] = new int[3];
         String temp[] = new String[3];
          String arr[] = new String[3];
         String blah = "#";
          String boing = "java.awt.Color[r=255,g=255,b=255]";
        //  String boing = myRobot.getPixelColor(x, y).toString(); //java.awt.Color[r=xxx,g=xxx,b=xxx]
         String heynow;
         heynow = boing.substring(14, boing.length());
         StringBuffer sb = new StringBuffer(heynow);
         System.out.println(sb);
          temp[0] = sb.substring(sb.indexOf("=")+1, sb.indexOf(","));
          System.out.println(temp[0]);
          sb.delete(sb.indexOf("="), sb.indexOf(",")+1);
         System.out.println(sb);
          temp[1] = sb.substring(sb.indexOf("=")+1, sb.indexOf(",")-1);
          System.out.println(temp[1]);
         sb.delete(sb.indexOf("="), sb.indexOf(",")+1);
         System.out.println(sb);
          temp[2] = sb.substring(sb.indexOf("=")+1, sb.indexOf("]")-1);
          System.out.println(temp[2]);
          sb.delete(sb.indexOf("="), sb.indexOf("]"));
          System.out.println(sb);
          rgb[0] = Integer.parseInt(temp[0]);
          rgb[1] = Integer.parseInt(temp[1]);
          rgb[2] = Integer.parseInt(temp[2]);
         for(int i = 0; i<3; i++){
              arr[i] = Integer.toHexString(rgb);}
for(int a = 0; a<3; a++){
blah.concat(arr[a]);}
try{
myRobot = new Robot();
}catch(AWTException awtex){}
if(evt.getActionCommand().equals("Submit"))
panA.setBackground( myRobot.getPixelColor(x, y) );
panB.setBackground( myRobot.getPixelColor(x, y) );
panC.setBackground( myRobot.getPixelColor(x, y) );
panD.setBackground( myRobot.getPixelColor(x, y) );
hex.setText(blah);
repaint();
public static void main ( String[] args )throws AWTException
GetColor frm = new GetColor();
WindowQuitter wquit = new WindowQuitter();
frm.addWindowListener( wquit );
frm.setSize( 350, 250 );
frm.setVisible( true );
frm.setTitle("Pixel Color");
class WindowQuitter extends WindowAdapter
public void windowClosing( WindowEvent e )
System.exit( 0 );

Answer 1

The NullPointerException comes from the fact you never created a Robot instance.
you might also change this junk
if(evt.getActionCommand().equals("Submit"))
              panA.setBackground( myRobot.getPixelColor(x, y) );
              panB.setBackground( myRobot.getPixelColor(x, y) );
              panC.setBackground( myRobot.getPixelColor(x, y) );
              panD.setBackground( myRobot.getPixelColor(x, y) );
              hex.setText(blah);into this
if(evt.getActionCommand().equals("Submit")) {
              panA.setBackground( myRobot.getPixelColor(x, y) );
              panB.setBackground( myRobot.getPixelColor(x, y) );
              panC.setBackground( myRobot.getPixelColor(x, y) );
              panD.setBackground( myRobot.getPixelColor(x, y) );
              hex.setText(blah);
}Note the brackets...