Why after initializing the array I cannot assign some value in array?

Question

This is my code, after initialized the array, I cannot able to reassign some value in array. It shows array index out of bound exception.

public class NewClass {
    public static void main(String args[]){

        String cl[]={};
        cl[0]="10";      
        System.out.print(cl.length);        
    }    
}

my output:

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
    at NewClass.main(NewClass.java:15)
Java Result: 1

your cl array size is 0 and you trying to insert value so java.lang.ArrayIndexOutOfBoundsException you can go for dynamic list such as List<String> c1=new ArrayList<>(); — Rustam
– Rustam, Commented Oct 13, 2015 at 6:32

Eran · Accepted Answer · 2015-10-13 06:30:15Z

8

String cl[]={};

Creates an instance of an empty array, so you can't add any elements to it.

In order to create a non empty array, use either

String cl[] = {"something",...};

or

String cl[] = new String[theArrayLength];

edited Oct 13, 2015 at 6:30

answered Oct 13, 2015 at 6:29

Eran

395k57 gold badges726 silver badges793 bronze badges

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

2 Comments

Revatha Ramanan K Over a year ago

so what is the solution. ?

Andreas Over a year ago

@Ram Use an ArrayList, if you need the "array" to be extensible.

Daniel Perník · Accepted Answer · 2015-10-13 07:02:59Z

2

If you want to declare your array, you can do something like this:

String cl[];

After that you can initialize your array by calling this:

cl = new String[10];

And your System.out.print(cl.length); will return what you want.

answered Oct 13, 2015 at 7:02

Daniel Perník

5,9523 gold badges44 silver badges47 bronze badges

Collectives™ on Stack Overflow

Why after initializing the array I cannot assign some value in array?

2 Answers 2

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related