在Java循环外传递变量

Question

I continue to get the error: variable V might not have been initialized. What am I doing wrong? I need to continue to work with the variable V outside of the loop. Is it possible to so this?

    String[] arr = _input.split(SEPARATOR);
    String[] V;
    int chunk = 1; // chunk size to divide
    for( int i=0;i<arr.length;i+=chunk){
        V = Arrays.copyOfRange(arr, i, Math.min(arr.length,i+chunk));
    }
    System.out.print(Arrays.toString(V));

Answer 1

只需将其初始分配为null ：

String[] V = null;

Answer 2

You must initialize the local variables before using it. Try this instead of String[] V;

String[] V = null;

Answer 3

It is not sure that you go into the loop. In that case V really is not initialized. Init the variable first String[] V = new String[0] .

Answer 4

Array object V must be initialized first

try doing

String[] V = null;

and give the array a more descriptive name... and follow oracle name conventions

Answer 5

Set String[] v=null;

also why you are coping the array in a loop??