DEVRY ECET 370 Week 1 Lab 1
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General Instructions
Exercises 1 , 2 , 4 , and 5 use the programs in DocSharinglabeled “ User-defined classes ."
Exercises 7 and 8 use the programs in DocSharinglabeled “ Using interfaces ."
Exercise 1 : Review of classes Create a project using the classes in the DocSharing area labeled “ User-defined classes ." Compile it , run it , and review the code that is given carefully .
Exercise 2 : User-defined methods The function area of the Triangle class is the framework of the actual method . Modify it so that it calculates the area of the triangle . Write a Main class to test your area method . Note : to calculate the area of a triangle from the vertices , first find the distances between each pair of vertices to obtain the length of the sides of the triangle . Then apply Heron ’ s formula to calculate the area given the length of the sides .