Replace App.java

RGBColours/src/App.java

-// Ex 1.4
-public class Colour {
-    int red;
-    int green;
-    int blue;
+public class App {
+    public static void main(String[] args) throws Exception {
+        Colour yellow = new Colour();
+        yellow.red = 255;
+        yellow.green = 255;
+        yellow.blue = 0;
+        Colour purple = new Colour();
+        purple.red = 128;
+        purple.green = 0;
+        purple.blue = 128;
+        Colour orange = new Colour();
+        orange.red = 255;
+        orange.green = 165;
+        orange.blue = 0;
+    }
 }