I made a simple phone keypad and I want to change a button to add numbers. Right now, the + button simply adds a + to the displayed numbers at the top, but I want that to add the inputted numbers. Like on a calculator, exactly what the + does. And I would like to change the clear button to be an enter button. Here's my partner's and I code so far to make the keypad:
public class Keypad extends JPanel implements ActionListener {
JLabel display;
JButton numButton;
JButton clearButton;
String displayContent = "";
String[] numPadContent = {"1","2","3","4","5","6","7","8","9","+","0"};
ArrayList<JButton> buttonList;
// Keypad constructor class
public Keypad(Container pane) {
// sets the size of the Keypad display
pane.setPreferredSize(new Dimension(320, 335));
// initialize display to hold displayContent
display = new JLabel(displayContent);
display.setPreferredSize(new Dimension(320, 25));
// create lowered bevel border around the display
display.setBorder(BorderFactory.createLoweredBevelBorder());
// add the display to the panel
pane.add(display, BorderLayout.PAGE_START);
// initialize the buttonList
buttonList = new ArrayList<JButton>(12);
JPanel numberPanel = new JPanel();
// set the numberPanel to have a 4row by 3col grid layout
numberPanel.setLayout(new GridLayout(4,3,0,0));
// set the size of the numberPanel
numberPanel.setPreferredSize(new Dimension(320,260));
// create the buttons and add them to the buttonList, properly displaying the numbers
for (int i = 0; i < numPadContent.length; i++) {
numButton = new JButton(numPadContent[i]);
buttonList.add(numButton);
}
// add the buttonList to the number panel
for (int n = 0; n < buttonList.size(); n++) {
buttonList.get(n).addActionListener(this);
numberPanel.add(buttonList.get(n));
}
// create black border around the number panel
numberPanel.setBorder(BorderFactory.createMatteBorder(5, 5, 5, 5, Color.black));
// add number panel to center part of display
pane.add(numberPanel, BorderLayout.LINE_END);
// create Clear button that is actionable
clearButton = new JButton("Clear");
clearButton.setPreferredSize(new Dimension(320, 30));
clearButton.addActionListener(this);
// add Clear button to bottom of display
pane.add(clearButton, BorderLayout.PAGE_END);
}
// update the display depending on clicked button(s)
public void actionPerformed(ActionEvent e) {
String textThere = display.getText();
String additionalText = "";
// add clicked number button text to display
for (int a = 0; a < buttonList.size(); a++) {
if (e.getSource().equals(buttonList.get(a))) {
additionalText = buttonList.get(a).getText();
}
}
// clear display if "Clear" button is clicked
if (e.getSource().equals(clearButton)) {
textThere = "";
}
display.setText(textThere.concat(additionalText));
}
public static void main(String[] args) {
//create and set up the window.
JFrame frame = new JFrame("Keypad");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//set up the content pane.
frame.getContentPane().add(new Keypad(frame));
frame.pack();
frame.setVisible(true);
}
