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Avishek Bhattacharyya
Java Calculator program
4 Answer(s)      5 years ago
Posted in : Java Beginners


import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
class Calculator implements ActionListener
{
int c,n;
String s1,s2,s3,s4,s5;
Frame f;
JButton b1,b2,b3,b4,b5,b6,b7,b8,b9,b10,b11,b12,b13,b14,b15,b16;
Panel p;
TextField tf1;
GridLayout gl;
Calculator()
{
f=new Frame("Calculator");
p=new Panel();
b1=new JButton("0");
b1.addActionListener(this);
b2=new JButton("1");
b2.addActionListener(this);
b3=new JButton("2");
b3.addActionListener(this);
b4=new JButton("3");
b4.addActionListener(this);
b5=new JButton("4");
b5.addActionListener(this);
b6=new JButton("5");
b6.addActionListener(this);
b7=new JButton("6");
b7.addActionListener(this);
b8=new JButton("7");
b8.addActionListener(this);
b9=new JButton("8");
b9.addActionListener(this);
b10=new JButton("9");
b10.addActionListener(this);
b11=new JButton("+");
b11.addActionListener(this);
b12=new JButton("-");
b12.addActionListener(this);
b13=new JButton("x");
b13.addActionListener(this);
b14=new JButton("/");
b14.addActionListener(this);
b15=new JButton("=");
b15.addActionListener(this);
b16=new JButton("A/C");
b16.addActionListener(this);
tf1=new TextField(20);
p.add(tf1);
tf1.setBackground(Color.yellow);
gl=new GridLayout(4,4,10,20);
p.setLayout(gl);
p.add(b1);p.add(b2);p.add(b3);p.add(b4);p.add(b5);p.add(b6);p.add(b7);p.add(b8);p.add(b9);p.add(b10);p.add(b11);p.add(b12);p.add(b13);p.add(b14);p.add(b15);p.add(b16);
f.add(p);
f.setSize(100,200);
f.setVisible(true);
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==b1)
{
s3=tf1.getText();
s4="0";
s5=s3+s4;
tf1.setText(s5);
}
if(e.getSource()==b2)
{
s3=tf1.getText();
s4="1";
s5=s3+s4;
tf1.setText(s5);
}
if(e.getSource()==b3)
{
s3=tf1.getText();
s4="2";
s5=s3+s4;
tf1.setText(s5);
}
if(e.getSource()==b4)
{
s3=tf1.getText();
s4="3";
s5=s3+s4;
tf1.setText(s5);
}
if(e.getSource()==b5)
{
s3=tf1.getText();
s4="4";
s5=s3+s4;
tf1.setText(s5);
}
if(e.getSource()==b6)
{
s3=tf1.getText();
s4="5";
s5=s3+s4;
tf1.setText(s5);
}
if(e.getSource()==b7)
{
s3=tf1.getText();
s4="6";
s5=s3+s4;
tf1.setText(s5);
}
if(e.getSource()==b8)
{
s3=tf1.getText();
s4="7";
s5=s3+s4;
tf1.setText(s5);
}
if(e.getSource()==b9)
{
s3=tf1.getText();
s4="8";
s5=s3+s4;
tf1.setText(s5);
}
if(e.getSource()==b10)
{
s3=tf1.getText();
s4="9";
s5=s3+s4;
tf1.setText(s5);
}
if(e.getSource()==b11)
{
s1=tf1.getText();
tf1.setText("");
c=1;
}
if(e.getSource()==b12)
{
s1=tf1.getText();
tf1.setText("");
c=2;
}
if(e.getSource()==b13)
{
s1=tf1.getText();
tf1.setText("");
c=3;
}
if(e.getSource()==b14)
{
s1=tf1.getText();
tf1.setText("");
c=4;
}
if(e.getSource()==b15)
{
s2=tf1.getText();
if(c==1)
{
n=Integer.parseInt(s1)+Integer.parseInt(s2);
tf1.setText(String.valueOf(n));
}
else
if(c==2)
{
n=Integer.parseInt(s1)-Integer.parseInt(s2);
tf1.setText(String.valueOf(n));
}
else
if(c==3)
{
n=Integer.parseInt(s1)*Integer.parseInt(s2);
tf1.setText(String.valueOf(n));
}
else
if(c==4)
{
n=Integer.parseInt(s1)/Integer.parseInt(s2);
tf1.setText(String.valueOf(n));
}
}
if(e.getSource()==b16)
{
tf1.setText("");
}
}
public static void main(String args[])
{
Calculator c=new Calculator();
}
}










In the above program,the intermediate results are not generated.eg,if 14+3-2,then the above program gives 15 but I would like to see 17 and the subtract 2 from it to get to get 15.It 'd be helpful if u could pls suggest the possible correction.

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January 14, 2010 at 10:51 AM


Hi Friend,

Please visit the following link:

http://www.roseindia.net/java/example/java/swing/calculator-in-swing.shtml

Hope that it will be helpful for you.
Thanks


June 26, 2012 at 9:58 PM


Hello friends For multidigit calculator code u can visit the follwowing link



July 2, 2012 at 12:37 AM


Java Calculator Code and methods



February 22, 2013 at 11:49 AM


import java.awt.*; import java.awt.event.*;

class AA implements ActionListener { Frame f; TextField tf;

Button b1,b2,b3,b4,b5,b6,b7,b8,b9,b0,plush,minus,mul,div,equal,clear;

String s="";

int n,c;

AA()
{
    f=new Frame("jamshjed");
    tf=new TextField();
    tf.setBounds(50,50,300,50);

    b1=new Button("1");
    b1.setBounds(50,150,50,50);
    b1.addActionListener(this);

    b2=new Button("2");
    b2.setBounds(105,150,50,50);
    b2.addActionListener(this);

    b3=new Button("3");
    b3.setBounds(160,150,50,50);b3.addActionListener(this);

    b4=new Button("4");
    b4.setBounds(215,150,50,50);b4.addActionListener(this);

    b5=new Button("5");
    b5.setBounds(270,150,50,50);b5.addActionListener(this);

    b6=new Button("6");
    b6.setBounds(50,230,50,50);b6.addActionListener(this);

    b7=new Button("7");
    b7.setBounds(105,230,50,50);b7.addActionListener(this);

    b8=new Button("8");
    b8.setBounds(160,230,50,50);b8.addActionListener(this);

    b9=new Button("9");
    b9.setBounds(215,230,50,50);b9.addActionListener(this);

    b0=new Button("0");
    b0.setBounds(270,230,50,50);b0.addActionListener(this);

    plush=new Button("+");
    plush.setBounds(50,310,160,50);plush.addActionListener(this);

    minus=new Button("-");
    minus.setBounds(215,310,105,50);minus.addActionListener(this);

    mul=new Button("*");
    mul.setBounds(50,390,50,50);mul.addActionListener(this);

    equal=new Button("=");
    equal.setBounds(105,390,50,50);equal.addActionListener(this);

    div=new Button("/");
    div.setBounds(160,390,50,50);div.addActionListener(this);

    clear=new Button("c");
    clear.setBounds(215,390,105,50);clear.addActionListener(this);

    f.add(b1);
    f.add(b2);
    f.add(b3);
    f.add(b4);
    f.add(b5);
    f.add(b6);
    f.add(b7);
    f.add(b8);
    f.add(b9);
    f.add(b0);
    f.add(plush);
    f.add(minus);
    f.add(mul);
    f.add(equal);
    f.add(div);
    f.add(clear);

    f.add(tf);
    f.setSize(500,500);
    f.setLayout(null);
    f.setVisible(true);
}

public void actionPerformed(ActionEvent e)
{
    if(e.getActionCommand().equals("1"))
    {

        s=s+"1";
        tf.setText(s);
    }

    if(e.getActionCommand().equals("2"))
    {
        s=s+"2";
        tf.setText(s);
    }

    if(e.getActionCommand().equals("3"))
    {
        s=s+"3";
        tf.setText(s);
    }

    if(e.getActionCommand().equals("4"))
    {
        s=s+"4";
        tf.setText(s);
    }

    if(e.getActionCommand().equals("5"))
    {
        s=s+"5";
        tf.setText(s);
    }

    if(e.getActionCommand().equals("6"))
    {
        s=s+"6";
        tf.setText(s);
    }
    if(e.getActionCommand().equals("7"))
    {
        s=s+"7";
        tf.setText(s);
    }
    if(e.getActionCommand().equals("8"))
    {
        s=s+"8";
        tf.setText(s);
    }

    if(e.getActionCommand().equals("9"))
    {
        s=s+"9";
        tf.setText(s);
    }

    if(e.getActionCommand().equals("0"))
    {
        s=s+"0";
        tf.setText(s);
    }

    if(e.getActionCommand().equals("+"))
    {
        n=Integer.parseInt(tf.getText());
        tf.setText("");
        s="";
        c=1;


    }

    if(e.getActionCommand().equals("-"))
    {
        n=Integer.parseInt(tf.getText());
        tf.setText("");
        s="";
        c=2;
    }
    if(e.getActionCommand().equals("/"))
    {
        n=Integer.parseInt(tf.getText());
        tf.setText("");
        s="";
        c=3;

    }
    if(e.getActionCommand().equals("*"))
    {
        n=Integer.parseInt(tf.getText());
        tf.setText("");
        s="";
        c=4;

    }

    if(e.getActionCommand().equals("c"))
    {

        tf.setText("");
        s="";


    }
    if(e.getActionCommand().equals("="))
    {

        if(c==1)
        {
            int j=Integer.parseInt(tf.getText());
            int k=n+j;
            String ss=String.valueOf(k);
            tf.setText(ss);

        }
        if(c==2)
        {
            int j=Integer.parseInt(tf.getText());
            int k=n-j;
            String ss=String.valueOf(k);
            tf.setText(ss);

        }

        if(c==3)
        {
            int j=Integer.parseInt(tf.getText());
            int k=n/j;
            String ss=String.valueOf(k);
            tf.setText(ss);

        }
        if(c==4)
        {
            int j=Integer.parseInt(tf.getText());
            int k=n*j;
            String ss=String.valueOf(k);
            tf.setText(ss);

        }

    }



}

public static void main(String... aa)
{
    AA o=new AA();
}

}



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