Data commit

Task/Roots-of-unity/Java/roots-of-unity.java

@@ -0,0 +1,29 @@
+import java.util.Locale;
+
+public class Test {
+
+    public static void main(String[] a) {
+        for (int n = 2; n < 6; n++)
+            unity(n);
+    }
+
+    public static void unity(int n) {
+        System.out.printf("%n%d: ", n);
+
+        //all the way around the circle at even intervals
+        for (double angle = 0; angle < 2 * Math.PI; angle += (2 * Math.PI) / n) {
+
+            double real = Math.cos(angle); //real axis is the x axis
+
+            if (Math.abs(real) < 1.0E-3)
+                real = 0.0; //get rid of annoying sci notation
+
+            double imag = Math.sin(angle); //imaginary axis is the y axis
+
+            if (Math.abs(imag) < 1.0E-3)
+                imag = 0.0;
+
+            System.out.printf(Locale.US, "(%9f,%9f) ", real, imag);
+        }
+    }
+}