Just another update

Task/Man-or-boy-test/Java/man-or-boy-test-1.java

@@ -0,0 +1,21 @@
+import java.util.function.DoubleSupplier;
+
+public class ManOrBoy {
+
+    static double A(int k, DoubleSupplier x1, DoubleSupplier x2,
+                 DoubleSupplier x3, DoubleSupplier x4, DoubleSupplier x5) {
+
+        DoubleSupplier B = new DoubleSupplier() {
+            int m = k;
+            public double getAsDouble() {
+                return A(--m, this, x1, x2, x3, x4);
+            }
+        };
+
+        return k <= 0 ? x4.getAsDouble() + x5.getAsDouble() : B.getAsDouble();
+    }
+
+    public static void main(String[] args) {
+        System.out.println(A(10, () -> 1.0, () -> -1.0, () -> -1.0, () -> 1.0, () -> 0.0));
+    }
+}