/** ** Constructor. Sets up user interface and initializations */
public Secondtry() {
operators = true;
doClear = false;
frame = new JFrame("Calculator");
frame.setLayout(new BorderLayout(10, 10));
display = new JTextArea();
display.setSize(245, 100);
display.setFont(new Font("SansSerif", Font.BOLD, 28));
display.setComponentOrientation(ComponentOrientation.RIGHT_TO_LEFT);
// create the numeric buttons for calculator
for (int i = 0; i < 10; i++) {
jb[i] = new JButton("" + (i));
jb[i].addActionListener(this);
jb[i].setFont(new Font("SansSerif", Font.BOLD, 14));
}
// create the square root button
root = new JButton("\u221A");
root.addActionListener(this);
root.setFont(new Font("SansSerif", Font.BOLD, 14));
// create the clear button
clear = new JButton("C");
clear.addActionListener(this);
clear.setFont(new Font("SansSerif", Font.BOLD, 14));
// create the plus button
plus = new JButton("\u002B");
plus.addActionListener(this);
plus.setFont(new Font("SansSerif", Font.BOLD, 14));
// create the minus button
minus = new JButton("\u002D");
minus.addActionListener(this);
minus.setFont(new Font("SansSerif", Font.BOLD, 14));
// create the multiply button
mult = new JButton("\u002A");
mult.addActionListener(this);
mult.setFont(new Font("SansSerif", Font.BOLD, 14));
// create the division button
div = new JButton("\u002F");
div.addActionListener(this);
div.setFont(new Font("SansSerif", Font.BOLD, 14));
// create the equals button
equals = new JButton("\u003D");
equals.addActionListener(this);
equals.setFont(new Font("SansSerif", Font.BOLD, 14));
equals.setPreferredSize(new Dimension(50, 60));
// create the point button
point = new JButton("\u002E");
point.addActionListener(this);
point.setFont(new Font("SansSerif", Font.BOLD, 14));
// button grid
JPanel buttons = new JPanel(new GridLayout(5, 4, 4, 4));
// add buttons to grid
buttons.add(clear);
buttons.add(root);
buttons.add(div);
buttons.add(mult);
// add numeric buttons to grid
for (int i = 7; i < 10; i++) buttons.add(jb[i]);
buttons.add(minus);
// add numeric buttons to grid
for (int i = 4; i < 7; i++) buttons.add(jb[i]);
buttons.add(plus);
// add numeric buttons to grid
for (int i = 1; i < 4; i++) buttons.add(jb[i]);
buttons.add(equals);
buttons.add(jb[0]);
buttons.add(point);
frame.add(display, BorderLayout.CENTER);
frame.add(buttons, BorderLayout.SOUTH);
frame.setSize(300, 400);
frame.setVisible(true);
frame.setResizable(false);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
