Here we give you java calculator code free download. our calculator is simple calculator program in java using methods and simple calculator in java using if else statement. we use java calculator source code netbeans download. if you want simple calculator in java or java project its that download java projects source code. simple java projects for beginners with source code free to use anyware. And firstly download calculator button and place your destination.(i keep this button in my desktop)
Click for free download calculator button in zip file
package calculator;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.border.Border;
public class Calculator implements ActionListener{
JFrame frame=new JFrame();
JPanel panel=new JPanel(); //cpannel
JTextArea textarea=new JTextArea(4,25);
JButton button1=new JButton();
JButton button2=new JButton();
JButton button3=new JButton();
JButton button4=new JButton();
JButton button5=new JButton();
JButton button6=new JButton();
JButton button7=new JButton();
JButton button8=new JButton();
JButton button9=new JButton();
JButton button0=new JButton();
JButton buttonadd=new JButton();
JButton buttonsub=new JButton();
JButton buttonmul=new JButton();
JButton buttondiv=new JButton();
JButton buttonclear=new JButton();
JButton buttonequal=new JButton();
JButton buttondot=new JButton();
double number1,number2,result;
int add=0,div=0,mul=0,sub=0;
public Calculator()
{
frame.setSize(340,450);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
frame.setTitle("Calcu");
frame.setResizable(false);
frame.add(panel);
panel.setBackground(Color.yellow);
Border border= BorderFactory.createLineBorder(Color.RED,4);
panel.add(textarea);
textarea.setBackground(Color.BLACK);
Border border2=BorderFactory.createLineBorder(Color.BLUE,3);
textarea.setBorder(border2);
Font font =new Font("arial",Font.BOLD,33);
textarea.setForeground(Color.WHITE);
textarea.setPreferredSize(new Dimension(4,25));
textarea.setLineWrap(true);
button1.setPreferredSize(new Dimension(100,40));
button1.setIcon(new ImageIcon("C:\Users\Admin\Desktop\Caculator Buttons\button1.png"));
button2.setPreferredSize(new Dimension(100,40));
button2.setIcon(new ImageIcon("C:\Users\Admin\Desktop\Caculator Buttons\button2.png"));
button3.setPreferredSize(new Dimension(100,40));
button3.setIcon(new ImageIcon("C:\Users\Admin\Desktop\Caculator Buttons\button3.png"));
button4.setPreferredSize(new Dimension(100,40));
button4.setIcon(new ImageIcon("C:\Users\Admin\Desktop\Caculator Buttons\button4.png"));
button5.setPreferredSize(new Dimension(100,40));
button5.setIcon(new ImageIcon("C:\Users\Admin\Desktop\Caculator Buttons\button5.png"));
button6.setPreferredSize(new Dimension(100,40));
button6.setIcon(new ImageIcon("C:\Users\Admin\Desktop\Caculator Buttons\button6.png"));
button7.setPreferredSize(new Dimension(100,40));
button7.setIcon(new ImageIcon("C:\Users\Admin\Desktop\Caculator Buttons\button7.png"));
button8.setPreferredSize(new Dimension(100,40));
button8.setIcon(new ImageIcon("C:\Users\Admin\Desktop\Caculator Buttons\button8.png"));
button9.setPreferredSize(new Dimension(100,40));
button9.setIcon(new ImageIcon("C:\Users\Admin\Desktop\Caculator Buttons\button9.png"));
button0.setPreferredSize(new Dimension(100,40));
button0.setIcon(new ImageIcon("C:\Users\Admin\Desktop\Caculator Buttons\button0.png"));
buttonadd.setPreferredSize(new Dimension(100,40));
buttonadd.setIcon(new ImageIcon("C:\Users\Admin\Desktop\Caculator Buttons\buttonadd.png"));
buttonsub.setPreferredSize(new Dimension(100,40));
buttonsub.setIcon(new ImageIcon("C:\Users\Admin\Desktop\Caculator Buttons\buttonsub.png"));
buttonmul.setPreferredSize(new Dimension(100,40));
buttonmul.setIcon(new ImageIcon("C:\Users\Admin\Desktop\Caculator Buttons\buttonmul.png"));
buttondiv.setPreferredSize(new Dimension(100,40));
buttondiv.setIcon(new ImageIcon("C:\Users\Admin\Desktop\Caculator Buttons\buttondiv.png"));
buttonclear.setPreferredSize(new Dimension(100,40));
buttonclear.setIcon(new ImageIcon("C:\Users\Admin\Desktop\Caculator Buttons\buttonclear.png"));
buttonequal.setPreferredSize(new Dimension(100,40));
buttonequal.setIcon(new ImageIcon("C:\Users\Admin\Desktop\Caculator Buttons\buttonequal.png"));
buttondot.setPreferredSize(new Dimension(100,40));
buttondot.setIcon(new ImageIcon("C:\Users\Admin\Desktop\Caculator Buttons\buttondot.png"));
panel.add(button0);
panel.add(button1);
panel.add(button2);
panel.add(button3);
panel.add(button4);
panel.add(button5);
panel.add(button6);
panel.add(button7);
panel.add(button8);
panel.add(button9);
panel.add(buttonadd);
panel.add(buttonsub);
panel.add(buttonclear);
panel.add(buttondiv);
panel.add(buttondot);
panel.add(buttonequal);
panel.add(buttonmul);
button0.addActionListener((ActionListener) this);
button1.addActionListener((ActionListener) this);
button2.addActionListener((ActionListener) this);
button3.addActionListener((ActionListener) this);
button4.addActionListener((ActionListener) this);
button5.addActionListener((ActionListener) this);
button6.addActionListener((ActionListener) this);
button7.addActionListener((ActionListener) this);
button8.addActionListener((ActionListener) this);
button9.addActionListener((ActionListener) this);
buttonadd.addActionListener((ActionListener) this);
buttonsub.addActionListener((ActionListener) this);
buttonclear.addActionListener((ActionListener) this);
buttondiv.addActionListener((ActionListener) this);
buttondot.addActionListener((ActionListener) this);
buttonequal.addActionListener((ActionListener) this);
buttonmul.addActionListener((ActionListener) this);
}
@Override
public void actionPerformed(ActionEvent e)
{
Object source= e.getSource();
if (source==buttonclear) {
number1=0.0;
number2=0.0;
textarea.setText("");
}
if(source==button1)
{
textarea.append("1");
}
if(source==button2)
{
textarea.append("2");
}
if(source==button3)
{
textarea.append("3");
}
if(source==button4)
{
textarea.append("4");
}
if(source==button5)
{
textarea.append("5");
}
if(source==button6)
{
textarea.append("6");
}
if(source==button7)
{
textarea.append("7");
}
if(source==button8)
{
textarea.append("8");
}
if(source==button9)
{
textarea.append("9");
}
if(source==button0)
{
textarea.append("0");
}
if(source==buttondot)
{
textarea.append(".");
}
if(source==buttonadd)
{
number1=number_reader();
textarea.setText("+");
add=1;
div=0;
sub=0;
mul=0;
}
if(source==buttondiv)
{
number1=number_reader();
textarea.setText("");
add=0;
div=1;
sub=0;
mul=0;
}
if(source==buttonmul)
{
number1=number_reader();
textarea.setText("");
add=0;
div=0;
sub=0;
mul=1;
}
if(source==buttonsub)
{
number1=number_reader();
textarea.setText("");
add=0;
div=0;
sub=1;
mul=0;
}
if(source==buttonequal)
{
number2=number_reader();
if (add>0) {
result=number1+number2;
textarea.setText(Double.toString(result));
}
if (sub>0) {
result=number1-number2;
textarea.setText(Double.toString(result));
}
if (mul>0) {
result=number1*number2;
textarea.setText(Double.toString(result));
}
if (div>0) {
result=number1/number2;
textarea.setText(Double.toString(result));
}
}
}
public double number_reader() {
double num1;
String s;
s=textarea.getText();
num1=Double.valueOf(s);
return num1;
}
public static void main(String[] args)
{
Calculator cal=new Calculator();
}
}
