CODEWITHSUNDEEP
javamethodsrepeat
Shaun Tighe
Shaun Tighe

Reputation: 17

How to call a method multiple times to change a variable?

I am trying to call an accelerate method on a speed variable that adds 5 to the speed variable each time it is called. I'm able to do it once in the constructor:

public int getAccelerate() {
    accelerate = (speed + 5);
    return accelerate;
}

and display it using

System.out.println(car1.getAccelerate());

but that only works once, which displays 105 if the speed variable is 100.

My question is: how do I update the speed variable each time the accelerate method is called to reflect the new speed value?

Calling it 5 times gives me the output

105
105
105
105
105

where I am trying to get the output

105
110
115
120
125

by calling the same method 5 times.

Upvotes: 0

Views: 1528

Answers (1)

nhouser9
nhouser9

Reputation: 6780

Think about what is happening. Your method takes speed, adds 5 to it, and puts that value in the variable accelerate. Then it returns accelerate. So every time, you change accelerate based on speed, but you never change speed! So for example, if speed is 100, the first call will return 100 + 5, the second call will return 100 + 5, and so on.

If you want this to work properly, change accelerate each time:

public int getAccelerate()
{
    accelerate = (accelerate + 5);
    return accelerate;
}

Or you could change speed each time:

public int getAccelerate()
{
    speed = (speed + 5);
    return speed;
}

Upvotes: 2

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