Miscellany

package Calculator;// CalcGUI.javaimport java.awt.*;import javax.swing.*;import java.awt.event.*;public class CalcGUI extends JFrame implements ActionListener {    JPanel contentPane;    JMenuBar jMenuBar1 = new JMenuBar();    JMenu menuFile = new JMenu();    JMenuItem menuQuit = new JMenuItem();    JTextField solution = new JTextField();    JButton[] numbers = new JButton[10];    JButton minus = new JButton();    JButton multiply = new JButton();    JButton add = new JButton();    JButton divide = new JButton();    JButton equals = new JButton();    JButton clear = new JButton();    String temp = "";        public CalcGUI() {        try {            setDefaultCloseOperation(EXIT_ON_CLOSE);            jbInit();        } catch (Exception exception) {            exception.printStackTrace();        }    }    private void jbInit() throws Exception {        contentPane = (JPanel) getContentPane();        for(int index = 0; index<10; index++) {            numbers[index] = new JButton(Integer.toString(index));            contentPane.add(numbers[index]);        }        numbers[1].setBounds(new Rectangle(9, 51, 51, 23));        numbers[2].setBounds(new Rectangle(73, 51, 51, 23));        numbers[3].setBounds(new Rectangle(137, 51, 51, 23));        numbers[4].setBounds(new Rectangle(9, 83, 51, 23));        numbers[5].setBounds(new Rectangle(73, 83, 51, 23));        numbers[6].setBounds(new Rectangle(137, 83, 51, 23));        numbers[7].setBounds(new Rectangle(9, 115, 51, 23));        numbers[8].setBounds(new Rectangle(73, 115, 51, 23));        numbers[9].setBounds(new Rectangle(137, 115, 51, 23));        numbers[0].setBounds(new Rectangle(73, 147, 51, 23));        this.setJMenuBar(jMenuBar1);        setSize(new Dimension(268, 237));        setTitle("Calculator");        contentPane.setLayout(null);        menuQuit.setText("Quit");        menuQuit.addActionListener(this);        menuFile.setText("File");        solution.setForeground(Color.black);        solution.setDisabledTextColor(Color.black);        solution.setBackground(Color.white);        solution.setEditable(false);        solution.setBounds(new Rectangle(9, 13, 179, 19));//        num1.addKeyListener(this);        minus.setBounds(new Rectangle(200, 83, 51, 23));        minus.setText("-");        multiply.setBounds(new Rectangle(200, 115, 51, 23));        multiply.setText("*");        add.setBounds(new Rectangle(200, 51, 51, 23));        add.setText("+");        add.addActionListener(this);        divide.setBounds(new Rectangle(200, 147, 51, 23));        divide.setToolTipText("");        divide.setText("/");        equals.setBounds(new Rectangle(200, 11, 51, 23));        equals.setText("=");        clear.setBounds(new Rectangle(137, 147, 51, 23));        clear.setText("C");        clear.addActionListener(this);        jMenuBar1.add(menuFile);        menuFile.add(menuQuit);        contentPane.add(solution);        contentPane.add(add);        contentPane.add(minus);        contentPane.add(multiply);        contentPane.add(divide);        contentPane.add(equals);        contentPane.add(clear);    }    public void actionPerformed(ActionEvent e) {      Object source = e.getSource();      if(source==menuQuit) {        System.exit(0);      }      for(int index = 0; index<numbers.length; index++) {        if(source==numbers[index]) {          temp = temp + ((JButton)source).getText();          solution.setText(temp); return;        }      }      if(source==clear) {        temp = "";        solution.setText(temp);      }    }}