A simple Java Calculator
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/******************************************************* * MYCPLUS Sample Code - https://www.mycplus.com * * * * This code is made available as a service to our * * visitors and is provided strictly for the * * purpose of illustration. * * * * Please direct all inquiries to saqib at mycplus.com * *******************************************************/ import java.awt.*; import java.awt.event.*; import javax.swing.*; public class CalculatorFormat implements WindowListener { private JButton b7,b8,b9,on,off,b4,b5,b6,mult,div,b1,b2,b3,add,sub,b0,dot,exp,ans,equals; private JTextField textField; private Container container; private FlowLayout layout; public CalculatorFormat() { super("My calculator"); layout=new FlowLayout(); container=getContentPane(); container.setLayout(layout); textField=new JTextField(25); container.add(textField); b7=new JButton("7 "); container.add(b7); b8=new JButton("8 "); container.add(b8); b9=new JButton("9 "); container.add(b9); on=new JButton("ON"); container.add(on); on.setBackground(Color.pink); off=new JButton("OFF"); container.add(off); off.setBackground(Color.pink); b4=new JButton(" 4 "); container.add(b4); b5=new JButton(" 5 "); container.add(b5); b6=new JButton(" 6 "); container.add(b6); mult=new JButton(" * "); container.add(mult); mult.setBackground(Color.pink); div=new JButton(" / "); container.add(div); div.setBackground(Color.pink); b1=new JButton(" 1 "); container.add(b1); b2=new JButton(" 2 "); container.add(b2); b3=new JButton(" 3 "); container.add(b3); add=new JButton(" + "); container.add(add); add.setBackground(Color.pink); sub=new JButton(" - "); container.add(sub); sub.setBackground(Color.pink); b0=new JButton("0"); container.add(b0); dot=new JButton("."); container.add(dot); exp=new JButton("EXP"); container.add(exp); exp.setBackground(Color.pink); ans=new JButton("ANS"); container.add(ans); ans.setBackground(Color.pink); equals=new JButton("="); container.add(equals); equals.setBackground(Color.pink); setBounds(300,200,300,250); setVisible(true); } public void windowClosing(WindowEvent e) { window.dispose(); system.exit(0); } public void windowOpened(WindowEvent e){ } public void windowClosed(WindowEvent e){ } public void windowIconified(WindowEvent e){ } public void windowDeiconified(WindowEvent e){ } public void windowActivated(WindowEvent e){ } public void windowDectivated(WindowEvent e){ } public static void main(String args[]) { CalculatorFormat ob1=new CalculatorFormat(); ob1.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } } |