In the numeric keypad program, if i press sum number it should be displayed in the label in the top white space. How do i do that? Please some one help me asap
In the numeric keypad program, if i press sum number it should be displayed in the label in the top white space. How do i do that? Please some one help me asap
import java.awt.BorderLayout;import java.awt.Color;import java.awt.GridLayout;import javax.swing.BorderFactory;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.JTextField;public class NumericKeyPad extends JPanel { //----------------------------------------------------------------- // Creates several bordered panels and displays them. //----------------------------------------------------------------- public static void main(String[] args) { JFrame frame = new JFrame("Numeric Keypad"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel panel = new JPanel(); panel.setLayout(new GridLayout(4, 3)); panel.setBorder(BorderFactory.createLineBorder(Color.BLACK, 3)); panel.setBackground(Color.white); JButton b1 = new JButton("1"); JButton b2 = new JButton("2"); JButton b3 = new JButton("3"); JButton b4 = new JButton("4"); JButton b5 = new JButton("5"); JButton b6 = new JButton("6"); JButton b7 = new JButton("7"); JButton b8 = new JButton("8"); JButton b9 = new JButton("9"); JButton b11 = new JButton(""); JButton b0 = new JButton("0"); JButton b12 = new JButton(""); panel.add(b1); panel.add(b2); panel.add(b3); panel.add(b4); panel.add(b5); panel.add(b6); panel.add(b7); panel.add(b8); panel.add(b9); panel.add(b11); panel.add(b0); panel.add(b12); frame.getContentPane().setLayout(new BorderLayout()); frame.getContentPane().add(panel,BorderLayout.CENTER); JButton clearBt = new JButton("Clear"); JTextField number = new JTextField(); number.setColumns(15); frame.getContentPane().add(number,BorderLayout.NORTH); frame.getContentPane().add(clearBt,BorderLayout.EAST); frame.pack(); frame.setVisible(true); }}
public class NumericKeyPad extends JPanel {
//-----------------------------------------------------------------
// Creates several bordered panels and displays them.
//-----------------------------------------------------------------
public static void main(String[] args) {
JFrame frame = new JFrame("Numeric Keypad");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JButton b1 = new JButton("1");
JButton b2 = new JButton("2");
JButton b3 = new JButton("3");
JButton b4 = new JButton("4");
JButton b5 = new JButton("5");
JButton b6 = new JButton("6");
JButton b7 = new JButton("7");
JButton b8 = new JButton("8");
JButton b9 = new JButton("9");
JButton b11 = new JButton("");
JButton b0 = new JButton("0");
JButton b12 = new JButton("");
frame.getContentPane().setLayout(new BorderLayout());
frame.getContentPane().add(panel,BorderLayout.CENTER);
JButton clearBt = new JButton("Clear");
final JTextField number = new JTextField();
number.setColumns(15);
frame.getContentPane().add(number,BorderLayout.NORTH);
frame.getContentPane().add(clearBt,BorderLayout.EAST);
// create an action listener that appends the number pressed to the text field
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
// get the number entered
String digit = e.getActionCommand();
// append number to the text field
number.setText(number.getText()+digit);
}
};
// add action listeners to buttons
b1.addActionListener(actionListener);
b2.addActionListener(actionListener);
// same for other number buttons
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import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent
import java.awt.event.ActionListe
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class NumericKeyPad extends JPanel {
//------------------------
// Creates several bordered panels and displays them.
//------------------------
public static void main(String[] args) {
JFrame frame = new JFrame("Numeric Keypad");
frame.setDefaultCloseOpera
JPanel panel = new JPanel();
panel.setLayout(new GridLayout(4, 3));
panel.setBorder(BorderFact
panel.setBackground(Color.
JButton b1 = new JButton("1");
JButton b2 = new JButton("2");
JButton b3 = new JButton("3");
JButton b4 = new JButton("4");
JButton b5 = new JButton("5");
JButton b6 = new JButton("6");
JButton b7 = new JButton("7");
JButton b8 = new JButton("8");
JButton b9 = new JButton("9");
JButton b11 = new JButton("");
JButton b0 = new JButton("0");
JButton b12 = new JButton("");
panel.add(b1);
panel.add(b2);
panel.add(b3);
panel.add(b4);
panel.add(b5);
panel.add(b6);
panel.add(b7);
panel.add(b8);
panel.add(b9);
panel.add(b11);
panel.add(b0);
panel.add(b12);
frame.getContentPane().set
frame.getContentPane().add
JButton clearBt = new JButton("Clear");
final JTextField number = new JTextField();
number.setColumns(15);
frame.getContentPane().add
frame.getContentPane().add
// create an action listener that appends the number pressed to the text field
ActionListener actionListener = new ActionListener() {
public void actionPerformed(ActionEven
// get the number entered
String digit = e.getActionCommand();
// append number to the text field
number.setText(number.getT
}
};
// add action listeners to buttons
b1.addActionListener(actio
b2.addActionListener(actio
// same for other number buttons
frame.pack();
frame.setVisible(true);
}
}
http://java.sun.com/docs/books/tutorial/uiswing/events/actionlistener.html