The problem

Suppose instead you declare translate with a return type of Circle:
```
0367:    public Circle translate(int pX, int pY)
```

A Java 1.4 compiler will produce:

0381: Circle.java:12: translate(int,int) in Circle cannot 
0382: override translate(int,int) in Shape; attempting to use 
0383: incompatible return type
0384: found   : Circle
0385: required: Shape
0386:    public Circle translate(int pX, int pY)
0387:                  ^

This is saying this is an incorrect overriding of Shape's translate method.