Area and circumfrence of circle

Area and circumfrence of circle

• 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 circle which is πr×r  which we have written as a*a*22/7  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×πr  which we have written as 2*a*22/7
• Put the result in result text field.
• Our program is ready.

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.

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.