Help Please Needed for Java Calculator - ActionListener HELP

Question

Hi. I am constructing a simple Java calculator and need help with the actionlistener and how it could work with my program. I am not too sure how to begin constructing the actionlistener. I would like to know the best and most simple solution to get this program work the way it should, like a real calculator. If anyone can help me, that would be much appreciated.
package calculator;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class CalculatorGUI extends JFrame implements ActionListener{
JTextField screen;
JButton button7;
JButton button8;
JButton button9;
JButton button4;
JButton button5;
JButton button6;
JButton button1;
JButton button2;
JButton button3;
JButton button0;
JButton add;
JButton minus;
JButton multiply;
JButton divide;
JButton equals;
JButton clear;
private JTextField m_displayField;
private boolean m_startNumber = true;
private String m_previousOp = "=";
private CalculatorLogic m_logic = new CalculatorLogic();
public CalculatorGUI() {
CalculatorGUILayout customLayout = new CalculatorGUILayout();
getContentPane().setFont(new Font("Helvetica", Font.PLAIN, 12));
getContentPane().setLayout(customLayout);
screen = new JTextField("textfield_1");
getContentPane().add(screen);
button7 = new JButton("7");
getContentPane().add(button7);
button7.addActionListener(this);
button8 = new JButton("8");
getContentPane().add(button8);
button8.addActionListener(this);
button9 = new JButton("9");
getContentPane().add(button9);
button9.addActionListener(this);
button4 = new JButton("4");
getContentPane().add(button4);
button4.addActionListener(this);
button5 = new JButton("5");
getContentPane().add(button5);
button5.addActionListener(this);
button6 = new JButton("6");
getContentPane().add(button6);
button6.addActionListener(this);
button1 = new JButton("1");
getContentPane().add(button1);
button1.addActionListener(this);
button2 = new JButton("2");
getContentPane().add(button2);
button2.addActionListener(this);
button3 = new JButton("3");
getContentPane().add(button3);
button3.addActionListener(this);
button0 = new JButton("0");
getContentPane().add(button0);
button0.addActionListener(this);
add = new JButton("+");
getContentPane().add(add);
add.addActionListener(this);
minus = new JButton("-");
getContentPane().add(minus);
minus.addActionListener(this);
multiply = new JButton("*");
getContentPane().add(multiply);
multiply.addActionListener(this);
divide = new JButton("/");
getContentPane().add(divide);
divide.addActionListener(this);
equals = new JButton("=");
getContentPane().add(equals);
equals.addActionListener(this);
clear = new JButton("Clear");
getContentPane().add(clear);
clear.addActionListener(this);
setSize(getPreferredSize());
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
public void actionPerformed(ActionEvent event) {
public static void main(String args[]) {
CalculatorGUI window = new CalculatorGUI();
window.setTitle("Calculator");
window.pack();
window.show();
class CalculatorGUILayout implements LayoutManager {
public CalculatorGUILayout() {
public void addLayoutComponent(String name, Component comp) {
public void removeLayoutComponent(Component comp) {
public Dimension preferredLayoutSize(Container parent) {
Dimension dim = new Dimension(0, 0);
Insets insets = parent.getInsets();
dim.width = 421 + insets.left + insets.right;
dim.height = 494 + insets.top + insets.bottom;
return dim;
public Dimension minimumLayoutSize(Container parent) {
Dimension dim = new Dimension(0, 0);
return dim;
public void layoutContainer(Container parent) {
Insets insets = parent.getInsets();
Component c;
c = parent.getComponent(0);
if (c.isVisible()) {c.setBounds(insets.left+8,insets.top+8,408,64);}
c = parent.getComponent(1);
if (c.isVisible()) {c.setBounds(insets.left+8,insets.top+80,96,56);}
c = parent.getComponent(2);
if (c.isVisible()) {c.setBounds(insets.left+120,insets.top+80,96,56);}
c = parent.getComponent(3);
if (c.isVisible()) {c.setBounds(insets.left+232,insets.top+80,96,56);}
c = parent.getComponent(4);
if (c.isVisible()) {c.setBounds(insets.left+8,insets.top+144,96,56);}
c = parent.getComponent(5);
if (c.isVisible()) {c.setBounds(insets.left+120,insets.top+144,96,56);}
c = parent.getComponent(6);
if (c.isVisible()) {c.setBounds(insets.left+232,insets.top+144,96,56);}
c = parent.getComponent(7);
if (c.isVisible()) {c.setBounds(insets.left+8,insets.top+208,96,56);}
c = parent.getComponent(8);
if (c.isVisible()) {c.setBounds(insets.left+120,insets.top+208,96,56);}
c = parent.getComponent(9);
if (c.isVisible()) {c.setBounds(insets.left+232,insets.top+208,96,56);}
c = parent.getComponent(10);
if (c.isVisible()) {c.setBounds(insets.left+120,insets.top+272,96,56);}
c = parent.getComponent(11);
if (c.isVisible()) {c.setBounds(insets.left+344,insets.top+80,72,56);}
c = parent.getComponent(12);
if (c.isVisible()) {c.setBounds(insets.left+344,insets.top+144,72,56);}
c = parent.getComponent(13);
if (c.isVisible()) {c.setBounds(insets.left+344,insets.top+208,72,56);}
c = parent.getComponent(14);
if (c.isVisible()) {c.setBounds(insets.left+344,insets.top+272,72,56);}
c = parent.getComponent(15);
if (c.isVisible()) {c.setBounds(insets.left+344,insets.top+336,72,56);}
c = parent.getComponent(16);
if (c.isVisible()) {c.setBounds(insets.left+8,insets.top+408,408,72);}
}

Answer 1

Yeah, I have a rough idea of what the calculator
should do, like most people would. Its just that I
dont know how to implement this in Java. Thats the
problem. Can anyone provide me with code snippets
that I can try?No I would rather see you make an effort from what has been discussed here. This is not a Java problem this is a general programming problem.