How do u make a text field for int only

Question

Hi I wanted to make the text Field int only
I.e
int temp = 0;
temp = testField.getText();
Thanks in advance

Answer 1

Rarna, I think this is what you are asking. This is a bare-bones TextField that only accepts keys that are numeric. I found that the left and right arrows still work. Backspace and delete do not so you would have to add additional case statements and code to handle these if you want to support them. I added a main method to try this out.
import java.awt.*;
import java.awt.event.*;
public class NumericTextField extends TextField implements KeyListener {
   public NumericTextField() {
      super();
      this.initField();
   public NumericTextField(int columns) {
      super(columns);
      this.initField();
   public NumericTextField(String text) {
      super(text);
      this.initField();
   public NumericTextField(String text,int columns) {
      super(text,columns);
      this.initField();
   private void initField() {
      setEditable(false);
      addKeyListener(this);
   public void keyPressed(KeyEvent e) {
      int key=e.getKeyCode();
      switch(key) {
         case KeyEvent.VK_0:
         case KeyEvent.VK_1:
         case KeyEvent.VK_2:
         case KeyEvent.VK_3:
         case KeyEvent.VK_4:
         case KeyEvent.VK_5:
         case KeyEvent.VK_6:
         case KeyEvent.VK_7:
         case KeyEvent.VK_8:
         case KeyEvent.VK_9:
            setText(getText()+e.getKeyChar());
   public void keyReleased(KeyEvent e) {;}
   public void keyTyped(KeyEvent e) {;}
   public static void main(String[] args) {
      Frame f=new Frame();
      NumericTextField ntf=new NumericTextField();
      f.add(ntf);
      f.pack();
      f.setVisible(true);