Assign String variable to an String array

Question

I am not able to assign a String variable to a String Array. My code is :

//Declaring a String array 
public String [] fileWrite = new String [10]; 

//assigning a variable 

String value = String.valueOf(aChar1);
fileWrite[0] = value;

But when I try to print the array, it gives null. I checked the value of variable value but that is ok. I cant understand the reason of array being null.

I fear that too much information is missing here. Please show how you print the array, and tell us just what aChar1 is. — Hovercraft Full Of Eels
– Hovercraft Full Of Eels, Commented May 16, 2012 at 18:55
Can you provide a short, complete, compilable example program that ehibits your issue? — Attila
– Attila, Commented May 16, 2012 at 18:55

Bohemian · Accepted Answer · 2012-05-16 19:02:37Z

6

Firstly, you need to know that "printing an array" in java is somewhat "broken": You need to use Arrays.toString(array) to print an array (you can't rely on array.toString() - it isn't useful).

Try this code:

public static void main(String[] args) {
    String[] fileWrite = new String[10];
    char aChar1 = 'x';
    String value = String.valueOf(aChar1);
    fileWrite[0] = value;
    System.out.println(Arrays.toString(fileWrite));
}

Output:

[x, null, null, null, null, null, null, null, null, null]

answered May 16, 2012 at 19:02

Bohemian♦

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Comments

msamogh · Accepted Answer · 2012-05-16 18:55:13Z

1

public String[] fileWrite = new String[10];
fileWrite[0] = aChar1 + "";

Try this

answered May 16, 2012 at 18:55

msamogh

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1 Comment

Louis Wasserman Over a year ago

What could this possibly do to help?

richarbernal · Accepted Answer · 2012-05-16 19:00:06Z

0

The assign is correct. Maybe the variable aChar1 is null or the string "null"

answered May 16, 2012 at 19:00

richarbernal

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Comments

Garrett Hall · Accepted Answer · 2012-05-16 19:01:49Z

0

To assign a variable to an array try

    String[] fileWrite = new String[10];
    Arrays.fill(fileWrite, aChar1);
    System.out.println(Arrays.toString(fileWrite));

answered May 16, 2012 at 19:01

Garrett Hall

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