UrbanPro
Login Ask & Answer Success Stories Paid Courses Free Classes Tuition & Classes Fees Write a Review All Categories Help Center
Post your Learning Need Signup as a Tutor
✕

Popular Cities

Bangalore

Hyderabad

Delhi

Mumbai

Chennai

Pune

Kolkata

Gurgaon

Ahmedabad

Jaipur

Noida

✕

Take BCA Tuition from the Best Tutors

  • Affordable fees
  • 1-1 or Group class
  • Flexible Timings
  • Verified Tutors

Book a Free Demo

BCA Tuition > Learn Java Programming > How to design a calculator which performs arithmetic...
✕

Search in

How to design a calculator which performs arithmetic operations using swings?

Asked by Last Modified  

3 Answers

Learn Java Programming

Follow 4
Answer

Please enter your answer

Gateway2IT driven trainings by Industry expert working professionals

Use Swing Designer to design front end for the calculator. After that, apply logic for arithmetic operations using the action performed method on every operator.
Comments
Dislike Bookmark

I am an IT Professional with having 5years of teaching(1000+ students in Kolkata)

import javax.swing.*; import java.awt.event.*; class Calc implements ActionListener { JFramef; JTextFieldt; JButton b1,b2,b3,b4,b5,b6,b7,b8,b9,b0,bdiv,bmul,bsub,badd,bdec,beq,bdel,bclr; staticdoublea=0,b=0,result=0; staticintoperator=0; Calc() { f=newJFrame("Calculator"); t=newJTextField(); b1=newJButton("1"); b2=newJButton("2"); b3=newJButton("3"); b4=newJButton("4"); b5=newJButton("5"); b6=newJButton("6"); b7=newJButton("7"); b8=newJButton("8"); b9=newJButton("9"); b0=newJButton("0"); bdiv=newJButton("/"); bmul=newJButton("*"); bsub=newJButton("-"); badd=newJButton("+"); bdec=newJButton("."); beq=newJButton("="); bdel=newJButton("Delete"); bclr=newJButton("Clear"); ...
read more
import javax.swing.*;
import java.awt.event.*;
 
 
class Calc implements ActionListener
{
JFramef;
JTextFieldt;
JButton b1,b2,b3,b4,b5,b6,b7,b8,b9,b0,bdiv,bmul,bsub,badd,bdec,beq,bdel,bclr;
 
staticdoublea=0,b=0,result=0;
staticintoperator=0;
 
Calc()
{
f=newJFrame("Calculator");
t=newJTextField();
b1=newJButton("1");
b2=newJButton("2");
b3=newJButton("3");
b4=newJButton("4");
b5=newJButton("5");
b6=newJButton("6");
b7=newJButton("7");
b8=newJButton("8");
b9=newJButton("9");
b0=newJButton("0");
bdiv=newJButton("/");
bmul=newJButton("*");
bsub=newJButton("-");
badd=newJButton("+");
bdec=newJButton(".");
beq=newJButton("=");
bdel=newJButton("Delete");
bclr=newJButton("Clear");
 
t.setBounds(30,40,280,30);
b7.setBounds(40,100,50,40);
b8.setBounds(110,100,50,40);
b9.setBounds(180,100,50,40);
bdiv.setBounds(250,100,50,40);
 
b4.setBounds(40,170,50,40);
b5.setBounds(110,170,50,40);
b6.setBounds(180,170,50,40);
bmul.setBounds(250,170,50,40);
 
b1.setBounds(40,240,50,40);
b2.setBounds(110,240,50,40);
b3.setBounds(180,240,50,40);
bsub.setBounds(250,240,50,40);
 
bdec.setBounds(40,310,50,40);
b0.setBounds(110,310,50,40);
beq.setBounds(180,310,50,40);
badd.setBounds(250,310,50,40);
 
bdel.setBounds(60,380,100,40);
bclr.setBounds(180,380,100,40);
 
f.add(t);
f.add(b7);
f.add(b8);
f.add(b9);
f.add(bdiv);
f.add(b4);
f.add(b5);
f.add(b6);
f.add(bmul);
f.add(b1);
f.add(b2);
f.add(b3);
f.add(bsub);
f.add(bdec);
f.add(b0);
f.add(beq);
f.add(badd);
f.add(bdel);
f.add(bclr);
 
f.setLayout(null);
f.setVisible(true);
f.setSize(350,500);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setResizable(false);
 
b1.addActionListener(this);
b2.addActionListener(this);
b3.addActionListener(this);
b4.addActionListener(this);
b5.addActionListener(this);
b6.addActionListener(this);
b7.addActionListener(this);
b8.addActionListener(this);
b9.addActionListener(this);
b0.addActionListener(this);
badd.addActionListener(this);
bdiv.addActionListener(this);
bmul.addActionListener(this);
bsub.addActionListener(this);
bdec.addActionListener(this);
beq.addActionListener(this);
bdel.addActionListener(this);
bclr.addActionListener(this);
}
 
publicvoidactionPerformed(ActionEvente)
{
if(e.getSource()==b1)
t.setText(t.getText().concat("1"));
 
if(e.getSource()==b2)
t.setText(t.getText().concat("2"));
 
if(e.getSource()==b3)
t.setText(t.getText().concat("3"));
 
if(e.getSource()==b4)
t.setText(t.getText().concat("4"));
 
if(e.getSource()==b5)
t.setText(t.getText().concat("5"));
 
if(e.getSource()==b6)
t.setText(t.getText().concat("6"));
 
if(e.getSource()==b7)
t.setText(t.getText().concat("7"));
 
if(e.getSource()==b8)
t.setText(t.getText().concat("8"));
 
if(e.getSource()==b9)
t.setText(t.getText().concat("9"));
 
if(e.getSource()==b0)
t.setText(t.getText().concat("0"));
 
if(e.getSource()==bdec)
t.setText(t.getText().concat("."));
 
if(e.getSource()==badd)
{
a=Double.parseDouble(t.getText());
operator=1;
t.setText("");
}
 
if(e.getSource()==bsub)
{
a=Double.parseDouble(t.getText());
operator=2;
t.setText("");
}
 
if(e.getSource()==bmul)
{
a=Double.parseDouble(t.getText());
operator=3;
t.setText("");
}
 
if(e.getSource()==bdiv)
{
a=Double.parseDouble(t.getText());
operator=4;
t.setText("");
}
 
if(e.getSource()==beq)
{
b=Double.parseDouble(t.getText());
 
switch(operator)
{
case1:result=a+b;
break;
 
case2:result=a-b;
break;
 
case3:result=a*b;
break;
 
case4:result=a/b;
break;
 
default:result=0;
}
 
t.setText(""+result);
}
 
if(e.getSource()==bclr)
t.setText("");
 
if(e.getSource()==bdel)
{
Strings=t.getText();
t.setText("");
for(inti=0;i<s.length()-1;i++)
t.setText(t.getText()+s.charAt(i));
}
}
 
publicstaticvoidmain(String...s)
{
newCalc();
}
}
read less
Comments
Dislike Bookmark

physics Trainer with 4+ years of experience at home tutor

// Java program to create a simple calculator // with basic +, -, /, * using java swing elements import java.awt.event.*; import javax.swing.*; import java.awt.*; class calculator extends JFrame implements ActionListener { // create a frame static JFrame f; // create a textfield...
read more
// Java program to create a simple calculator
// with basic +, -, /, * using java swing elements
  
import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
class calculator extends JFrame implements ActionListener {
    // create a frame
    static JFrame f;
  
    // create a textfield
    static JTextField l;
  
    // store oprerator and operands
    String s0, s1, s2;
  
    // default constrcutor
    calculator()
    {
        s0 = s1 = s2 = "";
    }
  
    // main function
    public static void main(String args[])
    {
        // create a frame
        f = new JFrame("calculator");
  
        try {
            // set look and feel
            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        }
        catch (Exception e) {
            System.err.println(e.getMessage());
        }
  
        // create a object of class
        calculator c = new calculator();
  
        // create a textfield
        l = new JTextField(16);
  
        // set the textfield to non editable
        l.setEditable(false);
  
        // create number buttons and some operators
        JButton b0, b1, b2, b3, b4, b5, b6, b7, b8, b9, ba, bs, bd, bm, be, beq, beq1;
  
        // create number buttons
        b0 = new JButton("0");
        b1 = new JButton("1");
        b2 = new JButton("2");
        b3 = new JButton("3");
        b4 = new JButton("4");
        b5 = new JButton("5");
        b6 = new JButton("6");
        b7 = new JButton("7");
        b8 = new JButton("8");
        b9 = new JButton("9");
  
        // equals button
        beq1 = new JButton("=");
  
        // create operator buttons
        ba = new JButton("+");
        bs = new JButton("-");
        bd = new JButton("/");
        bm = new JButton("*");
        beq = new JButton("C");
  
        // create . button
        be = new JButton(".");
  
        // create a panel
        JPanel p = new JPanel();
  
        // add action listeners
        bm.addActionListener(c);
        bd.addActionListener(c);
        bs.addActionListener(c);
        ba.addActionListener(c);
        b9.addActionListener(c);
        b8.addActionListener(c);
        b7.addActionListener(c);
        b6.addActionListener(c);
        b5.addActionListener(c);
        b4.addActionListener(c);
        b3.addActionListener(c);
        b2.addActionListener(c);
        b1.addActionListener(c);
        b0.addActionListener(c);
        be.addActionListener(c);
        beq.addActionListener(c);
        beq1.addActionListener(c);
  
        // add elements to panel
        p.add(l);
        p.add(ba);
        p.add(b1);
        p.add(b2);
        p.add(b3);
        p.add(bs);
        p.add(b4);
        p.add(b5);
        p.add(b6);
        p.add(bm);
        p.add(b7);
        p.add(b8);
        p.add(b9);
        p.add(bd);
        p.add(be);
        p.add(b0);
        p.add(beq);
        p.add(beq1);
  
        // set Background of panel
        p.setBackground(Color.blue);
  
        // add panel to frame
        f.add(p);
  
        f.setSize(200, 220);
        f.show();
    }
    public void actionPerformed(ActionEvent e)
    {
        String s = e.getActionCommand();
  
        // if the value is a number
        if ((s.charAt(0) >= '0' && s.charAt(0) <= '9') || s.charAt(0) == '.') {
            // if operand is present then add to second no
            if (!s1.equals(""))
                s2 = s2 + s;
            else
                s0 = s0 + s;
  
            // set the value of text
            l.setText(s0 + s1 + s2);
        }
        else if (s.charAt(0) == 'C') {
            // clear the one letter
            s0 = s1 = s2 = "";
  
            // set the value of text
            l.setText(s0 + s1 + s2);
        }
        else if (s.charAt(0) == '=') {
  
            double te;
  
            // store the value in 1st
            if (s1.equals("+"))
                te = (Double.parseDouble(s0) + Double.parseDouble(s2));
            else if (s1.equals("-"))
                te = (Double.parseDouble(s0) - Double.parseDouble(s2));
            else if (s1.equals("/"))
                te = (Double.parseDouble(s0) / Double.parseDouble(s2));
            else
                te = (Double.parseDouble(s0) * Double.parseDouble(s2));
  
            // set the value of text
            l.setText(s0 + s1 + s2 + "=" + te);
  
            // convert it to string
            s0 = Double.toString(te);
  
            s1 = s2 = "";
        }
        else {
            // if there was no operand
            if (s1.equals("") || s2.equals(""))
                s1 = s;
            // else evaluate
            else {
                double te;
  
                // store the value in 1st
                if (s1.equals("+"))
                    te = (Double.parseDouble(s0) + Double.parseDouble(s2));
                else if (s1.equals("-"))
                    te = (Double.parseDouble(s0) - Double.parseDouble(s2));
                else if (s1.equals("/"))
                    te = (Double.parseDouble(s0) / Double.parseDouble(s2));
                else
                    te = (Double.parseDouble(s0) * Double.parseDouble(s2));
  
                // convert it to string
                s0 = Double.toString(te);
  
                // place the operator
                s1 = s;
  
                // make the operand blank
                s2 = "";
            }
  
            // set the value of text
            l.setText(s0 + s1 + s2);
        }
    }
}
read less
Comments
Dislike Bookmark

View 1 more Answers

Related Questions

How to learn Java?
you learn self Java by good book. otherwise should be take help by tutors.
Harsh
what are the charges for c language
6k/month and will finish in 2 month.
Kawalpreet
Which language is best to learn for college freshers ?
Please tell me which class you read then I can suggest you.
Arjun
I know HTML, CSS, and a bit of JavaScript. What should I learn next?
HTML,CSS and Javascript are Tools which are used for Front-End Web Development. The next step is to learn the following: 1)Learn Javascript Frameworks like node.js,react.js,angular.js etc. 2)Learn Back-End...
Inch By
Write a program to exchange the first element with the last element of an array.
IN C Prog: void swap(int *arr,int length) { int a; /*Third Variable*/ a = *arr; *arr = a; arr = a; } In Java: int (int arr) { int a; int len = arr.length; int ar = arr; a = ar; ar = a; ar = ar; return ar; }
Akash

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Core Java Introduction

Jtcindia Java Training Center

0 0
0
Finding a Majority Element
Problem Description Task. The goal in this code problem is to check whether an input sequence contains a majority element. Input Format. The first line contains an integer, the next one contains a sequence...

Paras Chawla

0 0
0
Simple Algorithms - Fibonacci, Finding GCD & Finding LCM.
import java.util.Scanner; //0,1,1,2,3,5,8,13,21,34... //fun(n)=fun(n-1)+fun(n-2) where n>=2 /*fib(9)=fib(8)+fib(7) =fib(7)+fib(6)+fib(6)+fib(5) =fib(6)+fib(5)+fib(5)+fib(4)+fib(5)+fib(4)+fib(4)+fib(3) */ public...

Paras Chawla

0 0
0
Spring - Dependency Injection (DI)
Spring - Dependency Injection (DI) DI is a framework which provides loose coupling in code. Here loose coupling means no hard coding of the object. Instead of hard coding, we will be injecting these object...

Gaurav Kothari

1 0
0
Java Interview Questions & Answers
Java Interview Questions have been designed especially to get you acquainted with the nature of questions you may encounter during your interview for the subject of Java Programming Language. As per my...

Dev Group

2 0
0

Recommended Articles

6 Healthy Habits of School Children

While schools provide formal education to the children, the home is where they start learning about things informally. Parents think that schools will take the initiative to educate their children. Well, this is partially true, as parents also play an essential role in bringing up their child. For the development of particular...

Read full article >

Top Benefits of e-Learning

With the current trend of the world going digital, electronic renaissance is a new movement that is welcomed by the new generation as it helps makes the lives of millions of people easier and convenient. Along with this rapidly changing movement and gaining popularity of Internet, e-Learning is a new tool that emerging...

Read full article >

The Trend of E-learning and it’s Benefits

E-learning is not just about delivering lessons online. It has a much broader scope that goes beyond manual paper or PowerPoint Presentations. To understand the reach of E-learning and how the whole process works in developing the Educational system, we will discuss a few points here. Let us find out how this new learning...

Read full article >

How To Choose The Right School For Children?

Quality education does not only help children to get a successful career and life, but it also hugely contributes to society. The formal education of every child starts from school. Although there are numerous schools, parents find it challenging to choose the right one that would fit their child. It is difficult for them...

Read full article >

Find BCA Tuition near you
BCA Tuition in Bangalore
BCA Tuition in Delhi
BCA Tuition in Hyderabad
BCA Tuition in Pune
BCA Tuition in Chennai
BCA Tuition in Mumbai
BCA Tuition in Kolkata
BCA Tuition in Ghaziabad
BCA Tuition in Gurgaon
BCA Tuition in Noida

Looking for BCA Tuition ?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you
X

Looking for BCA Tuition Classes?

The best tutors for BCA Tuition Classes are on UrbanPro

  • Select the best Tutor
  • Book & Attend a Free Demo
  • Pay and start Learning

Take BCA Tuition with the Best Tutors

The best Tutors for BCA Tuition Classes are on UrbanPro

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more

ThinkVidya Learning Pvt Ltd © 2010-2024All Rights Reserved