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Experiment Title.: Write A Program To Create A Simple Calculator Using AWT Components in Java

The document describes a student experiment to create a simple calculator application using Java AWT components. It includes the aim, tasks, algorithm, code, and an evaluation grid. The student's code creates a calculator GUI with buttons for numbers and operators, handles button clicks to perform calculations, and displays results in a text field. The student learns to create basic GUI applications and perform calculations in Java.

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Shashank Kashyap Rajput
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188 views7 pages

Experiment Title.: Write A Program To Create A Simple Calculator Using AWT Components in Java

The document describes a student experiment to create a simple calculator application using Java AWT components. It includes the aim, tasks, algorithm, code, and an evaluation grid. The student's code creates a calculator GUI with buttons for numbers and operators, handles button clicks to perform calculations, and displays results in a text field. The student learns to create basic GUI applications and perform calculations in Java.

Uploaded by

Shashank Kashyap Rajput
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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Experiment Title.

Student Name:shashank UID:19BCA1328


Branch: BCA Section/Group- A/B
Semester: 4 Date of Performance:
Subject Nam Internet programming lab Subject Code:CAP-256

1. Aim/Overview of the practical:

Write a program to create a simple calculator using AWT components in java.

2. Task to be done:

3. Algorithm/Flowchart :

4. Dataset:

5. Code for experiment/practical:

import java.awt.*;

import java.awt.event.*;

class MyCalculator extends Frame implements ActionListener {

TextField tfInput;

Panel panel;
String btnString[] = {"7", "8", "9", "+",

"4", "5", "6", "-",

"1", "2", "3", "*",

"C", "0", "=", "/"};

Button btn[] = new Button[16];

int num1 = 0, num2 = 0, result = 0;

char op;

public MyCalculator() {

Font f = new Font("Cambria", Font.BOLD, 18);

tfInput = new TextField(10);

tfInput.setFont(f);

panel = new Panel();

add(tfInput, "North");

add(panel, "Center");

panel.setLayout(new GridLayout(4,4));

for(int i=0; i < 16; i++) {


btn[i] = new Button(btnString[i]);

btn[i].setFont(f);

btn[i].addActionListener(this);

panel.add(btn[i]);

addWindowListener(new WindowAdapter(){

public void windowClosing(WindowEvent we) {

System.exit(0);

});

public void actionPerformed(ActionEvent ae) {

String str = ae.getActionCommand();

if(str.equals("+")) {

op = '+';

num1 = Integer.parseInt(tfInput.getText());

tfInput.setText("");

else if(str.equals("-")) {
op = '-';

num1 = Integer.parseInt(tfInput.getText());

tfInput.setText("");

else if(str.equals("*")) {

op = '*';

num1 = Integer.parseInt(tfInput.getText());

tfInput.setText("");

else if(str.equals("/")) {

op = '/';

num1 = Integer.parseInt(tfInput.getText());

tfInput.setText("");

else if(str.equals("=")) {

num2 = Integer.parseInt(tfInput.getText());

switch(op) {

case '+' : result = num1 + num2;

break;

case '-' : result = num1 - num2;

break;

case '*' : result = num1 * num2;


break;

case '/' : result = num1 / num2;

break;

tfInput.setText(result + "");

result = 0;

else if(str.equals("C")) {

tfInput.setText("");

num1 = num2 = result = 0;

else {

tfInput.setText(tfInput.getText() + str);

public static void main(String args[]) {

MyCalculator m = new MyCalculator();

m.setTitle("My Calculator");

m.setSize(250,300);

m.setVisible(true);

}
6. Result/Output/Writing Summary:

Learning outcomes (What I have learnt):

1.

2.

3.

4.

5.
Evaluation Grid:

Sr. No. Parameters Marks Obtained Maximum Marks


1. Demonstration and Performance 5
(Pre Lab Quiz)
2. Worksheet 10
3. Post Lab Quiz 5

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