diff --git a/physics/relativity_equation/java/relativity_equation.java b/physics/relativity_equation/java/relativity_equation.java
new file mode 100644
index 000000000..943ad9843
--- /dev/null
+++ b/physics/relativity_equation/java/relativity_equation.java
@@ -0,0 +1,12 @@
+/**
+ * Created by robertoduessmann on 03/10/17.
+ */
+public class RelativityEquation {
+
+	private static final double SPEED_LIGHT = 299792458;
+
+	public static double getEnergy(double mass) {
+		//E = mc2
+		return mass * Math.pow( SPEED_LIGHT, 2 );
+	}
+}
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