Introduction - If you have any usage issues, please Google them yourself
1) write a Java application,
1) The program has three categories: Triangle, Circle and cone, were used to characterize the "triangle", "circle" and "cone." Specific requirements are as follows:
a) Triangle class has three types of double edge length and girth property define a constructor, returns three sides of the perimeter and modification methods. In addition, Triangle class also has a boolean type attribute, which is used to determine whether the three form a triangle.
b) Circle class with properties of type double the radius, circumference and area definitions set the radius, the method returns the area.
c) Cone Circle class has a bottom type, double type high these two properties, the definition of a constructor, method of calculating the volume of a cone.