public void stackPower(int stackAmount) { super.stackPower(stackAmount); if (this.amount == -1) { this.amount = -2; } else if (this.amount == -2) { this.amount = -3; } if (this.amount == -3) { this.amount = -4; } } During testing value goes from -1 to -2 to -4 to -6 etc.
What I want to happen: goes from -1 to -2 to -3 to -4 and then stops.
Could someone explain what I am missing here and how to fix my issue? Thanks.
Your third if condition is missing an else (but could just as easily be an else block). Like,
if (this.amount == -1) { this.amount = -2; } else if (this.amount == -2) { this.amount = -3; } else { this.amount = -4; } But, I would simplify the logic with a call to Math.max(int, int) like
this.amount = Math.max(-4, this.amount - 1); 
if (this.amount == -1) { this.amount = -2; } else if (this.amount == -2) { this.amount = -3; } I think the else if clause will never be executed, because, once the if clause is executed, the else clause wille never be executed.
Simply changing the else if into an if should fix the problem.
The issue you're having is because when you have an if-statement and an else-if, if we go into the if-statement we jump over subsequent else-if statements or else statements.
public void stackPower(int stackAmount) { super.stackPower(stackAmount); if (this.amount == -1) { this.amount = -2; } if (this.amount == -2) { this.amount = -3; } if (this.amount == -3) { this.amount = -4; } } 
amountvariable?amountvariable and are you using this in a loop?, if so post the loop block togethe with your question.