Step by Step solution about How to resolve the algorithm Angle difference between two bearings step by step in the Java programming language

Java Program to Calculate Angle Difference

Explanation:

This Java program defines a class AngleDifference that provides a method getDifference to calculate the difference between two angles b1 and b2. The angles are expected to be within the range of -180 to +180 degrees.

Method getDifference:

• It calculates the difference between b2 and b1 and stores it in r.
• The value of r may go beyond the -180 to +180 range.
• It handles this by applying the modulo operator (%) with 360.0 to wrap the angle within that range.
• If r is less than -180, it adds 360 to adjust it to the positive range.
• If r is greater than or equal to 180, it subtracts 360 to adjust it to the negative range.
• The adjusted r is returned as the angle difference.

Main Method:

• The main method demonstrates the getDifference method with various input angles:

  • Input in the range of -180 to +180:
    • Each test case shows the calculated angle difference.
  • Input outside the range of -180 to +180:
    • The method still calculates the angle difference, handling the angles beyond the range.

Example Outputs:

Input in -180 to +180 range
25.0
90.0
-10.0
5.0
80.0
100.0
80.0
100.0
-118.1184
-80.7109
Input in wider range
-67135.74195934214
-161949.67717798996
1183.6341015330045
17962.701144411732

public class AngleDifference {

    public static double getDifference(double b1, double b2) {
        double r = (b2 - b1) % 360.0;
        if (r < -180.0)
            r += 360.0;
        if (r >= 180.0)
            r -= 360.0;
        return r;
    }

    public static void main(String[] args) {
        System.out.println("Input in -180 to +180 range");
        System.out.println(getDifference(20.0, 45.0));
        System.out.println(getDifference(-45.0, 45.0));
        System.out.println(getDifference(-85.0, 90.0));
        System.out.println(getDifference(-95.0, 90.0));
        System.out.println(getDifference(-45.0, 125.0));
        System.out.println(getDifference(-45.0, 145.0));
        System.out.println(getDifference(-45.0, 125.0));
        System.out.println(getDifference(-45.0, 145.0));
        System.out.println(getDifference(29.4803, -88.6381));
        System.out.println(getDifference(-78.3251, -159.036));

        System.out.println("Input in wider range");
        System.out.println(getDifference(-70099.74233810938, 29840.67437876723));
        System.out.println(getDifference(-165313.6666297357, 33693.9894517456));
        System.out.println(getDifference(1174.8380510598456, -154146.66490124757));
        System.out.println(getDifference(60175.77306795546, 42213.07192354373));
    }
}