Take result from adding 2 txtboxes 2gether then label.setText = result ?

Question

I have 2 text boxes and I want to add [mathimatically +] their contents together then dispaly the result in a label when a button in clicked. I am using Net Beans 6. I have not found how to do this online so any help would be apriciated.
Code Follows:
* uconverter.java
* Created on January 12, 2008, 11:32 AM
package show_label;
* @author vb
public class uconverter extends javax.swing.JPanel {
/** Creates new form uconverter */
public uconverter() {
initComponents();
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
hellolb = new javax.swing.JLabel();
answer_btn = new javax.swing.JButton();
num1_txt = new javax.swing.JTextField();
num2_txt = new javax.swing.JTextField();
result_lb = new javax.swing.JLabel();
hellolb.setText(null);
answer_btn.setText("jButton1");
answer_btn.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
answer_btnMouseClicked(evt);
num1_txt.setText("Hi");
num1_txt.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
num1_txtActionPerformed(evt);
num2_txt.setText("Hi");
num2_txt.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
num2_txtActionPerformed(evt);
result_lb.setText("Result");
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
this.setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addGap(71, 71, 71)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(num1_txt, javax.swing.GroupLayout.PREFERRED_SIZE, 62, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(num2_txt, javax.swing.GroupLayout.PREFERRED_SIZE, 62, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 34, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
.addGroup(layout.createSequentialGroup()
.addComponent(hellolb)
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addComponent(answer_btn)
.addGap(152, 152, 152))))
.addGroup(layout.createSequentialGroup()
.addGap(53, 53, 53)
.addComponent(result_lb)
.addContainerGap())))
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(54, 54, 54)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(num1_txt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(hellolb)
.addComponent(result_lb))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(answer_btn)
.addComponent(num2_txt, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(186, Short.MAX_VALUE))
}// </editor-fold>
private void num1_txtActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
private void answer_btnMouseClicked(java.awt.event.MouseEvent evt) {
answer_lb.setText("num1" + "num2");
private void num2_txtActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
// Variables declaration - do not modify
private javax.swing.JButton answer_btn;
private javax.swing.JLabel hellolb;
private javax.swing.JTextField num1_txt;
private javax.swing.JTextField num2_txt;
private javax.swing.JLabel result_lb;
// End of variables declaration
Code Ends
Thanks for any help

Answer 1

* Get text from a text field with JTextComponent's getText(). (A JTextField is a JTextComponent).
* Convert text->number with Integer.parseInt() or Double.parseDouble()
* Add with +
* Convert back number->text with String.valueOf()
* Set a label's text with JLabel's setText()
http://java.sun.com/javase/6/docs/api/javax/swing/text/JTextComponent.html#getText()
http://java.sun.com/javase/6/docs/api/java/lang/Integer.html#parseInt(java.lang.String)
http://java.sun.com/javase/6/docs/api/java/lang/Double.html#parseDouble(java.lang.String)
http://java.sun.com/javase/6/docs/api/javax/swing/JLabel.html#setText(java.lang.String)
http://java.sun.com/javase/6/docs/api/java/lang/String.html#valueOf(int)
Suppose I have a text field leftTF displaying "12" another, rightTF displaying "6" and a JButton called addBut. I want to put the answer in a JLabel called answerLabel. Then I use something like the following in my code:
import awt.event.ActionListener;
import awt.event.ActionEvent;
// In a method somewhere
addBut.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
        updateAnswerLabel();
// Somewhere else - and this, finally is the answer to your question
    /** TODO: What if the user enters junk in the text fields? */
private void updateAnswerLabel() {
    int left = Integer.parseInt(leftTF.getText()); // left is now 12
    int right = Integer.parseInt(rightTF.getText()); // right is 6
    answerLabel.setText(String.valueOf(left + right)); // label displays "18"
        // or just
    //answerLabel.setText("" + left + right);
Class names in Java invariably begin with a capital letter, so UConverter not uconverter.
Use meaningful and readable variable and method names. I mean you should - Netbeans won't. This IDE seems to have a morbid fear of imports and an unnatural love of long but inexpressive names ending with a digit.
Indeed, consider putting NetBeans aside for a bit and using a plain text editor (possibly a syntax colouring one like TextPad). Folk will cite various reasons for this, but your post illustrates one that doesn't always get a mention: all that code, just to ask how to add things together? This IDE seems to make it very difficult to construct brief, minimal examples which illustrate a problem.
(And please use the code tags when you post: put {code} at the start of your code and again at the end. That way your code is readable when it's posted here.)
Also a little point about the event listener: I've used an ActionListener, not a MouseLIstener. That's because what's important is the button "firing", not a mouse being clicked. A mouse click is a common way of causing a button to fire. But so is a press of the space bar while the button has focus. Your code would miss this.