please explain!

Consider a method with the following header:

public static String triangleType(int a, int b, int c)

This method will return a string value indicating the type of triangle that results by having sides of length a, b and c. The possibilities are

• "equilateral" (all 3 sides same length)
• "isosceles" (2 sides same length, 3rd side different)
• "scalene" (all sides have different length).

This method performs no input or output. That is, your code should have no statements containing next(), nextInt(), nextDouble(), print(), println() or printf().