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public class BadExtension { }
abstract class Super {
public final void finalPublic() {}
public void justPublic() {}
public int intPublic() {}
public abstract void abstractWithBody() {} //ERROR shouldn't have a body
public abstract void abstractPublic();
public static final void staticFinalPublic() {}
}
class Sub extends Super { //ERROR must implement abstractPublic
public void finalPublic() {} //ERROR can't override final
void justPublic() {} //ERROR can't override with weaker access
public void intPublic() {} //ERROR can't change the return type
public static void staticFinalPublic() {} //ERROR can't even override static finals
}
interface I1 {
void m();
}
interface I2 {
int m();
}
class C12 implements I1, I2 {
public void m() {} //ERROR incompatible return types with I2.m()
}
interface I12 extends I1, I2 {} //ERROR I1.m() and I2.m() are not compatible
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