Add PythagoreanTriple.java

Ray · Ray · commit 918189ec2099 · 2020-08-16T10:32:10.000-04:00
diff --git a/Maths/PythagoreanTriple.java b/Maths/PythagoreanTriple.java
@@ -0,0 +1,32 @@
+package Maths;
+
+/**
+ * https://en.wikipedia.org/wiki/Pythagorean_triple
+ *
+ */
+public class PythagoreanTriple {
+	public static void main(String[] args) {
+		assert isPythagTriple(3,4,5);
+		assert isPythagTriple(5,12,13);
+		assert isPythagTriple(6,8,10);
+		assert !isPythagTriple(10,20,30);
+		assert !isPythagTriple(6,8,100);
+		assert !isPythagTriple(-1,-1,1);
+	}
+	
+	/**
+	 * Check if a,b,c are a Pythagorean Triple
+	 * 
+	 * @param a x/y component length of a right triangle
+	 * @param b y/x component length of a right triangle
+	 * @param c hypotenuse length of a right triangle
+	 * @return boolean <tt>true</tt> if a, b, c satisfy the Pythagorean theorem, otherwise <tt>false</tt>
+	 */
+	public static boolean isPythagTriple(int a, int b, int c) {
+		if(a <= 0 || b <= 0 || c <= 0) {
+			return false;
+		} else {
+			return (a * a) + (b * b) == (c * c);
+		}
+	}
+}
