Area and perimeter of square

Area and perimeter of square

• 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 square which is side × side which we have written as a* a 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 side × 4 which we have written as a*4.
• Put the result in result text field.
• Our program is ready.