In this tutorials will teach you how to add two number using OOP concepts. This is an important for developing a java projects. there are many students who struggling with this area. so that I bring this article for all to clear the doubts.
First You have to Design the Form
After that you have to create the class Cal.java
public class Cal
{
public int num1,num2,tot; // Create the Variables with Public Access specifier
public int Add() // Create the Method
{
tot = num1 + num2;
return tot;
}
}Paste the Code inside the Add Button
Cal c = new Cal();
c.num1 = Integer.parseInt(txtNum1.getText());
c.num2 = Integer.parseInt(txtNum2.getText());
txttot.setText(String.valueOf(c.Add()));