java-multilpe array initialization [duplicate]

Question

Well I'm trying to initialize more than one array using this method and it gives me this error as mentioned: Any solutions

            int [] x,y,z=new int [10];
            System.out.println("The first element of x:"+x[0]);
            System.out.println("The second element of y:"+y[1]);
            System.out.println("The third element of z:"+z[2]);`

And the error is:

ex1.java:47: error: variable x might not have been initialized
    System.out.println("The first element of x:"+x[0]);
                                                 ^
ex1.java:48: error: variable y might not have been initialized
    System.out.println("The second element of y:"+y[1]);
                                                  ^
2 errors

I'm going to assume that you intended to include the error message, it didn't make it in for some reason, and that you're about to edit your question to include it. — Joe C
– Joe C, Commented Aug 13, 2017 at 6:51

Eran · Accepted Answer · 2017-08-13 06:53:07Z

3

Well

int [] x,y,z=new int [10];

is equivalent to:

int[] x;
int[] y;
int[] z=new int [10];

x and y are not initialized.

You should initialize all 3 arrays:

int[] x = new int [10];
int[] y = new int [10];
int[] z = new int [10];

answered Aug 13, 2017 at 6:53

Eran

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Comments

Joe C · Accepted Answer · 2017-08-13 06:53:45Z

1

int [] x,y,z=new int [10];

You have only initialized z in this line, not x nor y. You need to add additional initializations for the other two variables as well.

int [] x=new int [10], y=new int [10], z=new int [10];

answered Aug 13, 2017 at 6:53

Joe C

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5 Comments

karanvora Over a year ago

This is the basic way. But the problem is, assume that I want to initialize more than 10 1-D array in one line, then what shall be the code?

Joe C Over a year ago

Trust me, you really don't want to initialize more than 10 arrays in a single line.

karanvora Over a year ago

But I want the code??If there is any for my problem...

Joe C Over a year ago

Well, if you really want it, just take the code I gave you, and add to it with exactly the same pattern. It will be nasty, but it will be a single line of nasty.

Joe C Over a year ago

Unless what you're really after is a 2D array.

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