import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class Project1 implements ActionListener{
char o;
int ctr=0;
String value="", cv="", oBtn;
Double answer, v1, v2;
Double NumberConverted;
JFrame f;
JPanel p1, p2, p3, p4, p5, p6;
private JTextField tField;
private JMenu EditMenu;
private JMenuBar menuBar;
private JMenuItem fmi1, fmi2, fmi3;
private JButton num0, num1, num2, num3, num4, num5, num6, num7, num8,
num9;
private JButton bAdd, bSub, bMul, bDiv, bPer, bSqrt, bFrac, bInt, bDot,
bCE, equals, backspace, clear;
Project1(){
f = new JFrame("Calculator");
menuBar = new JMenuBar();
EditMenu = new JMenu ("Edit");
fmi1 = new JMenuItem(" Copy ");
fmi2 = new JMenuItem(" Paste ");
fmi3 = new JMenuItem(" Quit ");
EditMenu.add(fmi1);
EditMenu.add(fmi2);
EditMenu.addSeparator();
EditMenu.add(fmi3);
p1 = new JPanel();
p2 = new JPanel();
//p2.setBorder(BorderFactory.createEmptyBorder(10,5,10,5));
p3 = new JPanel();
//p3.setBorder(BorderFactory.createEmptyBorder(5,5,5,5));
p4 = new JPanel();
p5 = new JPanel();
p6 = new JPanel();
tField = new JTextField(35);
num0 = new JButton ("0");
num1 = new JButton ("1");
num2 = new JButton ("2");
num3 = new JButton ("3");
num4 = new JButton ("4");
num5 = new JButton ("5");
num6 = new JButton ("6");
num7 = new JButton ("7");
num8 = new JButton ("8");
num9 = new JButton ("9");
bAdd = new JButton ("+");
bSub = new JButton ("-");
bMul = new JButton ("x");
bDiv = new JButton ("/");
bPer = new JButton ("%");
bSqrt = new JButton ("sqrt");
bFrac = new JButton ("1/x");
bInt = new JButton ("+/-");
bDot = new JButton (".");
bCE = new JButton ("CE");
equals = new JButton ("=");
backspace = new JButton ("Backspace");
clear = new JButton ("C");
}
public void launchFrame(){
tField.setText("0.");
menuBar.add(EditMenu);
p2.add(backspace);
p2.add(bCE);
p2.add(clear);
p3.add(num7);
p3.add(num8);
p3.add(num9);
p3.add(bDiv);
p3.add(bSqrt);
p4.add(num4);
p4.add(num5);
p4.add(num6);
p4.add(bMul);
p4.add(bPer);
p5.add(num1);
p5.add(num2);
p5.add(num3);
p5.add(bSub);
p5.add(bFrac);
p6.add(num0);
p6.add(bInt);
p6.add(bDot);
p6.add(bAdd);
p6.add(equals);
p2.setLayout(new GridLayout (1, 3, 4, 4) );
p3.setLayout(new GridLayout (1, 3, 4, 4) );
p4.setLayout(new GridLayout (1, 3, 4, 4) );
p5.setLayout(new GridLayout (1, 3, 4, 4) );
p6.setLayout(new GridLayout (1, 3, 4, 4) );
f.setLayout(new GridLayout (6, 1) );
f.setSize(290,180);
f.add(tField);
f.add(p2);
f.add(p3);
f.add(p4);
f.add(p5);
f.add(p6);
f.setVisible(true);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setJMenuBar(menuBar);
f.pack();
// ACTION LISTENERS
clear.addActionListener(this);
bCE.addActionListener(this);
num0.addActionListener(this);
num1.addActionListener(this);
num2.addActionListener(this);
num3.addActionListener(this);
num4.addActionListener(this);
num5.addActionListener(this);
num6.addActionListener(this);
num7.addActionListener(this);
num8.addActionListener(this);
num9.addActionListener(this);
bAdd.addActionListener(this);
bSub.addActionListener(this);
bMul.addActionListener(this);
bDiv.addActionListener(this);
bPer.addActionListener(this);
bInt.addActionListener(this);
bSqrt.addActionListener(this);
bFrac.addActionListener(this);
bDot.addActionListener(this);
equals.addActionListener(this);
backspace.addActionListener(this);
fmi1.addActionListener(this);
fmi2.addActionListener(this);
fmi3.addActionListener(this);
}
/*Action Event*/
public void actionPerformed(ActionEvent a){
try{
if(a.getSource()==num0){
value+=0;
tField.setText(value);
}
if(a.getSource()==num1){
value+=1;
tField.setText(value);
}
if(a.getSource()==num2){
value+=2;
tField.setText(value);
}
if(a.getSource()==num3){
value+=3;
tField.setText(value);
}
if(a.getSource()==num4){
value+=4;
tField.setText(value);
}
if(a.getSource()==num5){
value+=5;
tField.setText(value);
}
if(a.getSource()==num6){
value+=6;
tField.setText(value);
}
if(a.getSource()==num7){
value+=7;
tField.setText(value);
}
if(a.getSource()==num8){
value+=8;
tField.setText(value);
}
if(a.getSource()==num9){
value+=9;
tField.setText(value);
}
if (a.getSource() == bAdd){
v1 = Double.parseDouble( tField.getText() );
ctr=0;
o = '+';
value="";
tField.setText("" +value);
}
if (a.getSource() == bSub){
v1 = Double.parseDouble( tField.getText() );
ctr=0;
o = '-';
value="";
tField.setText("" +value);
}
if (a.getSource() == bMul){
v1 = Double.parseDouble( tField.getText() );
ctr=0;
o = 'x';
value="";
tField.setText("" +value);
}
if (a.getSource() == bDiv){
v1 = Double.parseDouble( tField.getText() );
ctr=0;
o = '/';
value="";
tField.setText("" +value);
}
if (a.getSource() == bPer){
v1 = Double.parseDouble( tField.getText() );
ctr=0;
value="";
answer = (v1/100);
tField.setText("" +answer);
}
if(a.getSource()==equals){
value="";
v2 = Double.parseDouble(tField.getText());
if(o=='+'){
ctr=0;
answer = v1 + v2;
tField.setText("" +answer);
value=""; v1=null; v2=null;
}
else if(o=='-'){
ctr=0;
answer = v1 - v2;
tField.setText("" +answer);
value=""; v1=null; v2=null;
}
else if(o=='x'){
ctr=0;
answer = v1 * v2;
tField.setText("" +answer);
value=""; v1=null; v2=null;
}
else if(o=='/'){
ctr=0;
answer = v1 / v2;
tField.setText("" +answer);
value=""; v1=null; v2=null;
}
else if(o=='%'){
ctr=0;
answer = v1 % v2;
tField.setText("" +answer);
value=""; v1=null; v2=null;
}
else{}
}
/* |-- EQUALS ACTION --| */
/* |-- Clear --| */
if(a.getSource()==clear){
ctr=0;
v1=null;
v2=null;
value="";
answer=0.;
tField.setText("0.");
}
if(a.getSource()==bCE){
ctr=0;
value="";
tField.setText("0.");
}
/* |-- Point --| */
if(a.getSource() == bDot){
if(ctr==0){
value+=".";
ctr+=1;
tField.setText("" +value);
}
else{
System.out.print("");
}
}
/* |-- Back Space --| */
if(a.getSource() == backspace){
value = value.substring(0, value.length()-1 );
tField.setText("" +value);
}
/* |-- Square Root --| */
if(a.getSource() == bSqrt){
ctr=0;
value = "";
v1 = Math.sqrt( Double.parseDouble( tField.getText() ) );
tField.setText("" +v1);
}
/* |-- Integer --| */
if(a.getSource() == bInt){
ctr=0;
NumberConverted = ( Double.parseDouble(tField.getText()) * -1 );
value = "";
tField.setText("" +NumberConverted);
}
/* |-- Reciprocal --| */
if(a.getSource() == bFrac){
ctr=0;
value = "";
Double NumberContainer = ( 1 / Double.parseDouble(
tField.getText() ) );
tField.setText("" +NumberContainer);
}
// ------------ Menu Item Actions ------------ //
if(a.getSource() == fmi1){
cv = tField.getText();
}
if(a.getSource() == fmi2){
tField.setText("" +cv);
}
if(a.getSource() == fmi3){
System.exit(0);
}
} // End of Try
catch(StringIndexOutOfBoundsException str){}
catch(NumberFormatException nfe){}
catch(NullPointerException npe){}
} // END OF ACTION EVENTS
public static void main (String args[]){
Project1 s = new Project1();
s.launchFrame();
}
}
OUTPUT :
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