Object Oriented Programming

Object Oriented Programming
Java Development Kit 7.2  HERE
JCreater Pro  HERE
Eclipse  x86  x64
Instructor's  link
JAVA,How to program 8th Ed  HERE
Thinking in JAVA 4th Ed  HERE




HELLO WORLD

public class HelloWorld { 
 public static void main(String[] args) 
 { 
 System.out.println("Hello World!"); 
 } 
}

  CALCULATOR
NOTE:-


 "DO NOT Email as it is to sir sohaib.plzzzz....."
 "It is just for helpingmy fellows."


/**
* @(#)Calculator.java
*
*
* @author Awais Ahmad Alvi BTE-SP11-012-B
* @version 1.00 2012/2/28
*/


public class Calculator {

private double op1,op2,result;
public Calculator() {
}
public void setOp1(double op_1){
op1 = op_1;
}
public void setOp2(double op_2){
op2 = op_2;
}
public double getOp1(){
return op1;
}
public double getOp2(){
return op2;
}
public double getResult(){
return result;
}
public void add(){
result = getOp1() + getOp2();
}
public void sub(){
result = getOp1() - getOp2();
}
public void multi(){
result = getOp1() * getOp2();
}
public void div(){
if(getOp2() == 0)
result = 0;
else
result = getOp1()/getOp2();
}
public void pow(){
int counter;
result = 1;
for(counter = 1;counter<=getOp2();counter++)
result = getOp1()*result;
}
}





/**
* @(#)CalculatorTest.java
*
*
* @author Awais Ahmad Alvi BTE-SP11-012-B
* @version 1.00 2012/2/28
*/

import java.util.Scanner;
public class CalculatorTest {

public static void main(String a[]){
Scanner sc = new Scanner(System.in);
Calculator cal = new Calculator();
double op1,op2,result;
int operation;
System.out.println("Enter operation\n"+"1. ADDITION\n2. SUBTRATION\n"
+"3. MULTIPLICATION"+"\n4. DIVISION\n"+"5. POWER");
operation = sc.nextInt();

System.out.println("Enter First no:");
op1 = sc.nextInt();
cal.setOp1(op1);
System.out.println("Enter Second no:");
op2 = sc.nextInt();
cal.setOp2(op2);

if(operation == 1)
cal.add();
else if(operation == 2)
cal.sub();
else if(operation == 3)
cal.multi();
else if(operation == 4)
cal.div();
else if(operation == 5)
cal.pow();
else
System.out.println("Invalid Entry");
System.out.println(cal.getResult());
}


}