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ClockAngle.java
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ClockAngle.java
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/*
* Title: Clock Angle
*
* Given two integers, an hour and a minute, write a function to
* calculate the angle between the two hands on a clock representing
* that time.
*
* Execution: javac ClockAngle.java && java ClockAngle
* For more details, check out http://www.byte-by-byte.com/clockangle
*/
public class ClockAngle {
public static double clockAngle(int hour, int minutes) {
final double MINUTES_PER_HOUR = 60;
final double DEGREES_PER_MINUTE = 360 / MINUTES_PER_HOUR;
final double DEGREES_PER_HOUR = 360 / 12;
double minuteAngle = minutes * DEGREES_PER_MINUTE;
double hourAngle = hour * DEGREES_PER_HOUR + (minutes / MINUTES_PER_HOUR) * DEGREES_PER_HOUR;
double diff = Math.abs(minuteAngle - hourAngle);
if (diff > 180) {
return 360 - diff;
}
return diff;
}
// Sample test cases
public static void main(String[] args) {
assert clockAngle(3, 40) == 130:
"3:40 is 130 degrees";
assert clockAngle(1, 20) == 80:
"1:20 is 80 degrees";
assert clockAngle(5, 15) == 67.5:
"5:15 is 67.5 degrees";
System.out.println("Passed all test cases");
}
}