Java user input?

Question

  myf = new Finch();
    do
    {
              //menu 4
    if (s.equals("Tap Test")) RunTapTest(s);

            } 

  private static void RunTapTest(String s)
    {
        @SuppressWarnings("resource")
        Scanner reader = new Scanner(System.in);
        System.out.println("Enter the time interval in which you want the Finch to move backwards: ");

        //get user input for tapBack
        int tapBack = reader.nextInt();

        System.out.println("\n"+"Running: "+s+"\n");
        long before = System.currentTimeMillis();
        while(System.currentTimeMillis() - before < testtime)
        {
            System.out.println(myf.isTapped());
            //myf.setWheelVelocities(-255,0,testtime);

        }
                    //I can't set myf.isTapped = true
        if (myf.isTapped()) {
            myf.setWheelVelocities(-255,0,tapBack);
        }


    }

Here's the homework question:

Menu option 4 will determine if the Finch has been tapped on its tail. If so, the Finch should respond with the spoken words “Thanks” and move backwards for a user specified time interval.

I'm just trying to fix the user specified time interval (at the moment), and I'm having trouble implementing it.

If I attempt this code

if (myf.isTapped() = true) {
            myf.setWheelVelocities(-255,0,tapBack);
        }

I get an error on:

if (myf.isTapped() = true)

Saying

The left-hand side of an assignment must be a variable

I'm struggling on how to get the robot to move backwards if the myf.isTapped = true

Maybe myf.isTapped cannot take boolean values?

I'm using http://docs.oracle.com/javase/1.5.0/docs/api/java/util/Scanner.html for user input (integer in this case)

Also, I think the my.isTapped is from an external Jar file.

try if (myf.isTapped() == true) or even better: if (myf.isTapped()) — jlordo
– jlordo, Commented Dec 15, 2012 at 17:33

Alexis Pigeon · Accepted Answer · 2012-12-15 17:31:59Z

3

Change it to

if (myf.isTapped() == true)

or even better

if (myf.isTapped())

= means assignment, == means comparison.

answered Dec 15, 2012 at 17:31

Alexis Pigeon

7,52811 gold badges41 silver badges46 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Rahul Tripathi · Accepted Answer · 2012-12-15 17:34:09Z

2

Try changing

 if (myf.isTapped() = true)

to

 if (myf.isTapped())

answered Dec 15, 2012 at 17:34

Rahul Tripathi

173k33 gold badges292 silver badges341 bronze badges

2 Comments

Smit Over a year ago

'myf.isTapped()' is supposed to be returning 'boolean' then why this extra check. However your not changing anything at all. Correct your answer

Smit Over a year ago

Yes. It's great now. +1 ;-}

Pranav A. · Accepted Answer · 2017-02-03 13:27:58Z

-1

In all languages (at least in jS, Python, Java, and C#) = means assignment. == is the "equal to" operator.

I come from a Python background so:

test = True
if test == True:
    print("Hello")
else:
    print("Goodbye")

The result from running this code would be

Hello

answered Feb 3, 2017 at 13:27

Pranav A.

4701 gold badge5 silver badges18 bronze badges

Collectives™ on Stack Overflow

Java user input?

3 Answers 3

Comments

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related