//-----------------------------------------
class Callum{
    private int a,b,c; // Lyle.a = 1 is no longer valid
    public Callum(){
        this.a = 1;
        this.b = 2;
        this.c = 3;
    }
}

Callum Lyle = new Callum(); //Lyle.a = 1, but you still can't view this value as you have no getter/setter
//-----------------------------------------