I'm having trouble getting a JPanel inside a BorderLayout to work. I defined the layout of the Panel as a Grid Layout, and then added a bunch of buttons I had made before hand to the JPanel. However, when I run the program, the JFrame loads but nothing within the frame loads. Here's the code:
import java.awt.*;
import javax.swing.*;
public class Phone extends JFrame {
private JTextField PhoneText;
private JPanel ButtonPanel;
private JButton bttn1;
private JButton bttn2;
private JButton bttn3;
private JButton bttn4;
private JButton bttn5;
private JButton bttn6;
private JButton bttn7;
private JButton bttn8;
private JButton bttn9;
private JButton bttn10;
private JButton bttn11;
private JButton bttn12;
public Phone(){
setTitle("Phone - Agustin Ferreira");
Container ContentPane = getContentPane();
ContentPane.setLayout(new BorderLayout());
setSize(300, 400);
setVisible(true);
setBackground(Color.DARK_GRAY);
PhoneText = new JTextField("(317)188-8566");
bttn1 = new JButton ("1");
bttn2 = new JButton ("2");
bttn3 = new JButton ("3");
bttn4 = new JButton ("4");
bttn5 = new JButton ("5");
bttn6 = new JButton ("6");
bttn7 = new JButton ("7");
bttn8 = new JButton ("8");
bttn9 = new JButton ("9");
bttn10 = new JButton ("*");
bttn11 = new JButton ("0");
bttn12 = new JButton ("#");
ButtonPanel = new JPanel(new GridLayout(4,3,0,0));
ButtonPanel.add(bttn1);
ButtonPanel.add(bttn2);
ButtonPanel.add(bttn3);
ButtonPanel.add(bttn4);
ButtonPanel.add(bttn5);
ButtonPanel.add(bttn6);
ButtonPanel.add(bttn7);
ButtonPanel.add(bttn8);
ButtonPanel.add(bttn9);
ButtonPanel.add(bttn10);
ButtonPanel.add(bttn11);
ButtonPanel.add(bttn12);
ContentPane.add(PhoneText, BorderLayout.NORTH);
ContentPane.add(ButtonPanel, BorderLayout.CENTER);
}
}
Additionally, I have another class that calls the Phone class. Here's the code for that, just in case:
package ProgrammingAssignment11;
import javax.swing.JFrame;
public class GUI_Driver {
public static void main(String[] args) {
Phone Nokia;
Nokia = new Phone();
Nokia.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
}
}
Any Help?
Much appreciated, M3tal T1ger
Your main problem:
setVisible(true)
after adding components to your GUI. You don't do this and so the GUI gets drawn without its components. Also:
pack()
after adding all components and before making the GUI visible. For example:
import java.awt.BorderLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import javax.swing.*;
@SuppressWarnings("serial")
public class Phone2 extends JPanel {
private static final String[][] BTN_TEXTS = {
{"1", "2", "3"},
{"4", "5", "6"},
{"7", "8", "9"},
{"*", "0", "#"}
};
private static final float BTN_POINTS = 48f;
private static final float TEXT_POINTS = 24f;
private static final int DISPLAY_COLUMNS = 12;
private JButton[][] buttons = new JButton[BTN_TEXTS.length][BTN_TEXTS[0].length];
private JTextField display = new JTextField(DISPLAY_COLUMNS);
public Phone2() {
display.setFocusable(false);
display.setFont(display.getFont().deriveFont(TEXT_POINTS));
GridLayout gridLayout = new GridLayout(BTN_TEXTS.length, BTN_TEXTS[0].length);
JPanel btnPanel = new JPanel(gridLayout);
for (int i = 0; i < BTN_TEXTS.length; i++) {
for (int j = 0; j < BTN_TEXTS[i].length; j++) {
String text = BTN_TEXTS[i][j];
JButton btn = new JButton(new BtnAction(text));
btn.setFont(btn.getFont().deriveFont(Font.BOLD, BTN_POINTS));
btnPanel.add(btn);
buttons[i][j] = btn;
}
}
setLayout(new BorderLayout());
add(display, BorderLayout.NORTH);
add(btnPanel, BorderLayout.CENTER);
}
private class BtnAction extends AbstractAction {
public BtnAction(String name) {
super(name);
}
@Override
public void actionPerformed(ActionEvent evt) {
String text = evt.getActionCommand();
display.setText(display.getText() + text);
}
}
private static void createAndShowGui() {
Phone2 mainPanel = new Phone2();
JFrame frame = new JFrame("Phone");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(mainPanel);
frame.pack();
frame.setLocationByPlatform(true);
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGui();
}
});
}
}
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