Printing int[] array from a display method

Question

I am trying to print an int[] array from a seperate method in the same class.

public class LargeInteger {

    public LargeInteger(String s) {

        int[] intArray = new int[s.length()];

        for (int i = 0; i < s.length(); i++) {
            intArray[i] = Character.digit(s.charAt(i), 10);
        }
    }

    public Object display() {

         for (int i = 0; i < intArray.length; i++) {     
                System.out.print(intArray[i]);
            }
    }   
}

My intArray is clearly being hidden from the display method, but I am not sure what to do

Prine · Accepted Answer · 2012-03-22 14:57:17Z

1

I will give you the answer but you should first invest some time to look up your problem on google. Google knows "almost" everything...

public class LargeInteger {

    private int[] intArray;

    public LargeInteger(String s) {

        intArray = new int[s.length()];

        for (int i = 0; i < s.length(); i++) {
            intArray[i] = Character.digit(s.charAt(i), 10);
        }
    }

    public void display() {

         for (int i = 0; i < intArray.length; i++) {     
                System.out.print(intArray[i]);
            }
    }   
}

And your display method should be void if it isn't returning anything..

answered Mar 22, 2012 at 14:57

Prine

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1 Comment

Sackling Over a year ago

Thanks, I tried googling of course. It is very hard to find specifics like this though. I mean I can easily find how to loop an array for instance but finding out how to split the display into another method is harder to find.

SLaks · Accepted Answer · 2012-03-22 14:54:52Z

0

intArray is a local variable in the constructor.
It doesn't exist anywhere else.

You need to make a private field instead.

answered Mar 22, 2012 at 14:54

SLaks

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Comments

scibuff · Accepted Answer · 2012-03-22 14:55:24Z

0

You need to declare the array outside of LargeInteger method, eg

private int[] intArray;

public LargeInteger(String s){

    this.intArray = new int[s.length()];

}

answered Mar 22, 2012 at 14:55

scibuff

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Comments

Tom · Accepted Answer · 2012-03-22 14:55:30Z

0

public class LargeInteger {

private int[] intArray;

public LargeInteger(String s) {

    this.intArray = new int[s.length()];

    for (int i = 0; i < s.length(); i++) {
        intArray[i] = Character.digit(s.charAt(i), 10);
    }
}

public Object display() {

     for (int i = 0; i < this.intArray.length; i++) {     
            System.out.print(intArray[i]);
        }
}   
}

answered Mar 22, 2012 at 14:55

Tom

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Comments

Ted Hopp · Accepted Answer · 2012-03-22 14:55:53Z

0

Make intArray a member of the LargeInteger class instead of a local to the constructor:

public class LargeInteger {

    private int[] intArray;

    public LargeInteger(String s) {

        intArray = new int[s.length()];

        for (int i = 0; i < s.length(); i++) {
            intArray[i] = Character.digit(s.charAt(i), 10);
        }
    }

    public Object display() {

         for (int i = 0; i < intArray.length; i++) {     
                System.out.print(intArray[i]);
            }
    }   
}

answered Mar 22, 2012 at 14:55

Ted Hopp

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Comments

Mayur · Accepted Answer · 2012-03-22 14:56:53Z

0

Just declare int[] intArray out of the constructor.

It should be

public class LargeInteger {

    private int[] intArray;

    public LargeInteger(String s) {

        intArray = new int[s.length()];

        for (int i = 0; i < s.length(); i++) {
            intArray[i] = Character.digit(s.charAt(i), 10);
        }
    }

    public Object display() {

         for (int i = 0; i < intArray.length; i++) {     
                System.out.print(intArray[i]);
            }
    }   
}

answered Mar 22, 2012 at 14:56

Mayur

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