Java Programming Language

A static method that accepts the radius of a circle and returns the area of the circle. Use the following formula:

Area = * r * 2

Use Math.PI for and r for the radius of the circle

A static method that accepts the length and width of a rectangle and returns the area of the rectangle. Use the following formula:

Area = Length x Width

A static method that accepts the length of a triangles base and the triangles height. The method should return the area of the triangle. Use the following formula:

Area = Base x Height x 0.5

The methods should display an error message if negative values are used for the circles radius, the rectangles length or width, or the triangles base or height.

Next write a program to test the class, which displays the following menu and responds to the users selection:

Geometry calculator:

1 Calculate the Area of a Circle

2 Calculate the Area of a Rectangle

3 Calculate the Area of a Triangle

Quit

Enter your choice (1-4):

Display an error message if the user enters a number outside the range of 1 through 4 when selecting an item from the menu.