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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);
}
}
Asked:
2-
2
- +1
1 Solution
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;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
public class NumericKeyPad extends JFrame {
//-----------------------------------------------------------------
// Creates several bordered panels and displays them.
//-----------------------------------------------------------------
int preInt=0;
JButton clearBt = new JButton("Clear");
JTextField number = new JTextField();
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("=");
public NumericKeyPad(){
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);
b1.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
number.setText(number.getText() + "1");
}
});
b2.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
number.setText(number.getText() + "2");
}
});
b3.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
number.setText(number.getText() + "3");
}
});
b4.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
number.setText(number.getText() + "4");
}
});
b5.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
number.setText(number.getText() + "5");
}
});
b6.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
number.setText(number.getText() + "6");
}
});
b7.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
number.setText(number.getText() + "7");
}
});
b8.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
number.setText(number.getText() + "8");
}
});
b9.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
number.setText(number.getText() + "9");
}
});
b11.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
preInt = Integer.parseInt(number.getText());
number.setText("");
}
});
b12.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
number.setText(String.valueOf((preInt + Integer.parseInt(number.getText()))));
}
});
clearBt.addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
number.setText("");
preInt= 0;
}
});
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);
number.setColumns(15);
frame.getContentPane().add(number,BorderLayout.NORTH);
frame.getContentPane().add(clearBt,BorderLayout.EAST);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
new NumericKeyPad();
}
}
Following link can be helpful.
make a generic listener for all butons
http://www.roseindia.net/java/example/java/awt/KeyPress.shtml
make a generic listener for all butons
http://www.roseindia.net/java/example/java/awt/KeyPress.shtml
Hey savan i need actionListener for the clear button. Please help ASAP
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
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.
//-----------------------------------------------------------------
int preInt=0;
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");
final JTextField number = new JTextField();
number.setColumns(15);
frame.getContentPane().add(number,BorderLayout.NORTH);
frame.getContentPane().add(clearBt,BorderLayout.EAST);
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);
}
};
ActionListener actionListener1 = new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
//String clear = e.getActionCommand();
number.setText("");
}
};
b1.addActionListener(actionListener);
b2.addActionListener(actionListener);
b3.addActionListener(actionListener);
b4.addActionListener(actionListener);
b5.addActionListener(actionListener);
b6.addActionListener(actionListener);
b7.addActionListener(actionListener);
b8.addActionListener(actionListener);
b9.addActionListener(actionListener);
b11.addActionListener(actionListener);
b0.addActionListener(actionListener);
b12.addActionListener(actionListener);
clearBt.addActionListener(actionListener);
frame.pack();
frame.setVisible(true);
}
}
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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