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package state.five;
interface I {
public int f();
public int g();
public void changeDirection();
}
class C implements I {
private State state = new StateMinus();
private int i;
private int j;
public int f() {
return state.f();
}
public int g() {
return state.g();
}
public void changeDirection() {
state = state.next();
}
interface State {
public int f();
public int g();
public State next();
}
class StateMinus implements State {
public int f() {
i -= 32;
return i;
}
public int g() {
j -= 27;
return j;
}
public State next() {
return new StatePlus();
}
}
class StatePlus implements State {
public int f() {
i += 26;
return i;
}
public int g() {
j += 42;
return j;
}
public State next() {
return new StateMinus();
}
}
}
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