Creating a Calculator panel using AWT in Java

By -
The Real power of java comes into the picture in AWT and Applet in java.
We can create a popup window and program it according to our use, just like real life applications in the computers.
It is a simple design of a calculator using AWT and Swing.

 Screenshots:

Calculator panel in ubuntu

Calculator panel in Windows

The Code:

import java.util.*;
import java.awt.*;
import javax.swing.*;

class calculator extends Frame
{
 Panel number,text_box,operation,buttons;
 JFrame cal;   /*Creating and object for JFrame*/
 
 /*Creating Buttons and TextBox  reference variables*/
 Button one,two,three,four,five,six,seven,eight,nine,zero,dot,plus,minus,mul,div,percentage,factorial,log,Ln,brac1,brac2;
 TextField box;

 public calculator()
 {
  /*Configuring frame of the window and Heading, Layout, close button action*/
  cal = new JFrame();
  cal.setTitle("CALCULATOR");  /*Title of the window*/
  cal.setSize(500,500);  /*size of the window in pixels*/
  cal.setLayout(new FlowLayout());
  cal.setVisible(true);  /*objects are vigible on the window*/
  cal.setLocationRelativeTo(null);
  cal.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  /*window closes on clicking the close button*/
  cal.setLayout(new GridLayout(2,1));  /*Row=2 column=1*/

  /*Setting the panels*/
  number = new Panel(); /*number panel*/
  number.setLayout(new GridLayout(4,3));  /*Row=4 and Colomn=3*/
  //number.setBackground(Color.BLUE);  /*Optional color*/
  text_box = new Panel();  /*textbox panel*/
  operation = new Panel();  /*operator panel*/
  operation.setLayout(new GridLayout(4,3)); /*Row=4 clomn=3*/
  buttons = new Panel(); /*button panel*/
  buttons.setLayout(new GridLayout(1,2));  
  
  /*assigning name on the buttons*/
  box = new TextField(50);
  one = new Button("1");
  two = new Button("2");
  three = new Button("3");
  four = new Button("4");
  five = new Button("5");
  six = new Button("6");
  seven = new Button("7");
  eight = new Button("8");
  nine = new Button("9");
  zero = new Button("0");
  dot = new Button(".");
  plus = new Button("+");
  minus = new Button("_");
  mul = new Button("X");
  div = new Button("/");
  percentage = new Button("%");
  factorial = new Button("x!");
  log = new Button("log(");
  Ln = new Button("Ln(");
  brac1 = new Button("(");
  brac2 = new Button(")");
  
  /*adding buttons on the screen*/
  text_box.add(box);
  number.add(one);
  number.add(two);
  number.add(three);
  number.add(four);
  number.add(five);
  number.add(six);
  number.add(seven);
  number.add(eight);
  number.add(nine);
  number.add(zero);
  
  operation.add(plus);
  operation.add(minus);
  operation.add(mul);
  operation.add(div);
  operation.add(percentage);
  operation.add(factorial);
  operation.add(log);
  operation.add(Ln);
  operation.add(brac1);
  operation.add(brac2);

  cal.add(text_box);
  buttons.add(number);
  buttons.add(operation);
  cal.add(buttons);
 }

 public static void main(String arg[])
 {
  new calculator();  //invoking the default constructor of the class
 }
}

/***********Tejeswar Tripathy******** https://www.dProBuk.com************/

Comments

Post a Comment

Popular posts from this blog

Non Restoring Division Algorithm Implementation in C

By Sidharth Patnaik -
Image
This  is a Dynamic program for the implementation of the NON RESTORING Division Algorithm in C Language. Non Restoring Division uses Left Shift Operations, Twos' Compliment and Binary Addition. Screenshots[Demo] The Code #include<stdio.h> #include<malloc.h> int *a,*q,*m,*mc,*c,n,d; int powr(int x,int y) { int s=1,i; for(i=0;i<y;i++) s=s*x; return s; } void print(int arr[],int n) { int i; for(i=0;i<n;i++) printf("%d ",arr[i]); } void bin(int n, int arr[]){ int r, i = 0; do{ r = n % 2; n /= 2; arr[i] = r; i++; }while(n > 0); } void set(int array[], int x){ int i,tmp[20]={0}; for(i = x -1; i >=0; i--) tmp[x-1-i]=array[i]; for(i=0;i<x;i++) array[i]=tmp[i]; } int len(int x) { int i=0; while(powr(2,i)<=x) i++; return ++i; } void addBinary(int a1[], int a2[]) { int bi[2]={0},ca[20]={0}; int t=len(n),tmp=0; int *su=(int*)malloc(sizeof(int)*len(n)); while(t
Read more

Bit Stuffing Code Implementation in Java

By -
Image
This is an implementation of the Bit Stuffing popularly used in data communication, also known as one of the concepts of Framing data bits. To know more please  click here. Sample Output: This is a sample output with data binary data entered as 11001111110. Program Code: import java.util.*; public class BitStuffing { public static void main(String[] args) { System.out.print("Enter the Binary message: "); Scanner sn=new Scanner(System.in); String data = sn.nextLine(); String res = new String(); String out=new String(); int counter = 0; for(int i=0;i<data.length();i++) { if (data.charAt(i)!='1' && data.charAt(i)!='0') { System.out.println("Enter only Binary values!!!"); return; }
Read more

Employee Management System Using Inheritance in Java

By Sidharth Patnaik -
Image
This program will help you in creating an simple Employee Management System using java language. In this program a class emp is used which has name, id and salary as data members. inside it there are two methods namely get() and disp() which work as getting user input and displaying the output. Scanner class is used as well. This program is an implementation of array of objects. Sample Output : The Code here: import java.util.*; class emp { public String name; public int id,sal; public void get() { Scanner s=new Scanner(System.in); System.out.print("Enter The Name: "); name=s.next(); System.out.print("Enter The id: "); id=s.nextInt(); System.out.print("Enter The sal: "); sal=s.nextInt(); s.close(); } public void disp() { System.out.println("The Name of the employee is "+name+" having id: "+id+"and a salary worth to: "+sal); } } class MainClass extends emp { publ
Read more