Below Program is a Demonstrate usage of Class, Objects, variables and Methods.
Calculator Class Source File:
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package com.mypacakage.demo; class CalculatorClass { int val1; int val2; int result; String operation; //Call Below Function after Object creation with arguments //These function will set Result instance variable and display the result //Addition Function public void addition(int arg1, int arg2){ result = arg1+arg2; } //Subtraction Function public void subtraction(int arg1, int arg2){ result = arg1-arg2; } //Multiplication Function public void multiplication(int arg1, int arg2){ result = arg1*arg2; } //Division Function public void division(int arg1, int arg2){ result = arg1/arg2; } //Call any Operation //Function to Demonstrate that while Object is created from other Class Function, //we can set the Class instance variable val1 and val2 and just call the this function public void call_any_ops(char ops){ switch(ops){ case 'A': addition(val1,val2); break; case 'S' : subtraction(val1,val2); break; case 'D' : multiplication(val1,val2); break; case 'M' : division(val1,val2); break; } //Call Show Result Method showresult(); } public void showresult(){ System.out.println("Result of the Operation: " + result); } } |
CalculatorTest Class Source File:
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package com.mypacakage.demo; public class CalculatorTest { public static void main(String[] args) { // TODO Auto-generated method stub //Creat Object CalculatorClass objCalc = new CalculatorClass(); System.out.println("Call Direct Functions with Arguments"); //Call Independent methods //These function will set Result instance variable and display the result objCalc.addition(10, 2); objCalc.showresult(); objCalc.subtraction(10, 2); objCalc.showresult(); objCalc.multiplication(10, 2); objCalc.showresult(); objCalc.division(10,2); objCalc.showresult(); //First set the Class Instance Variables System.out.println("Set Class Instance Variable and call 'call_any_ops' method"); objCalc.val1 = 10; objCalc.val2 = 2; objCalc.call_any_ops('A');//For Addition objCalc.call_any_ops('S');//For Subtraction objCalc.call_any_ops('D');//For Division objCalc.call_any_ops('M'); //For Multiplication } } |