Area and perimeter of rectangle

Area and perimeter of rectangle

• Open netbeans and make new application.
• Open jFrame component and put the other components from pallet like given below:
  
• We have kept two buttons:

1. Area

   2.  Perimeter

• Now we will write the code of area button.
Code for area
• Code is given below:
  
• Here we have taken double method instead of integer because it is capable to work with higher numbers as well as decimals.
• Declear variable.
• Connect first text field.
• Put the formula of area of rectangle which is length × bredth which we have written as a × b where * is sign of multiply.
• Put the result in result text field.
Code for perimeter


Code is given below:

Coding is like same as of area button but the difference is of formula.
Formula is 2(L+B) which we have written as c=a+b and then d=2*c.
d is result.
Put the result in result text field.
Our program is ready.