Building Triangles
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(Created page with "Your assignment is to build three classes: Point, Triangle, and TestTriangle. Two of them will have toString() methods. These methods are used by println() if you try to displa...") |
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Class Point will have: | Class Point will have: | ||
| − | * two double | + | * two double fields, x and y. |
| + | * a two argument constructor for setting the fields. | ||
* nobody else should be able to look at or change those variables except with accessor or modifier methods (that you must write.) | * nobody else should be able to look at or change those variables except with accessor or modifier methods (that you must write.) | ||
| − | * a method named distance that takes another point as an argument and finds the distance between the two points. | + | * a method named distance() that takes another point as an argument and finds the distance between the two points. |
| − | * a toString() method that has no arguments and returns a String showing the point as a coordinate pair. | + | * a toString() method that has no arguments and returns a String showing the point as a coordinate pair such as (9,3). |
Class Triangle will have: | Class Triangle will have: | ||
| − | * three Point variables | + | * an array of three Point variables. They represent the vertex points. |
| − | * | + | * a constructor that takes 3 Points as arguments. |
| − | * a | + | * nobody should be able to look at or change those points. |
| − | * a perimeter method that anybody can use which returns the perimeter of the Triangle. | + | * a sideLength() method that takes two integer arguments which are the indexes of two points in the array. Example: sideLength(0, 2). It should use the Point.distance() method to calculate the answer. |
| − | * an area method that anybody can use, [[http://www.mathopenref.com/coordtrianglearea.html which uses this formula.]] Remember that the functions you'll need are in class Math. | + | * a perimeter() method that anybody can use which returns the perimeter of the Triangle. |
| + | * an area() method that anybody can use, [[http://www.mathopenref.com/coordtrianglearea.html which uses this formula.]] Remember that the functions you'll need are in class Math. | ||
| + | * a toString() method that has no arguments and returns a string describing the Triangle by its three points, its side lengths, its perimeter and its area. | ||
| − | Class TestTriangle will have | + | Class TestTriangle will have a main() that should: |
| − | + | * create at least three triangles, all with different points. | |
| − | + | * print the triangles. | |
| − | + | * print the sum of the perimeters and the sum of the areas of the triangles. | |
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| − | ** print the sum of the perimeters and the sum of the areas of the | + | |
