I have a query about strings.
I'm declaring my string array as:
private static String[] name;
I'm then trying to add a string to it:
name[0] = temp // Where temp as another string
I am getting a nullpointer error with the above code. Am I initialising my string array correctly?
Looks like you've missed to write
name = new String[CAPACITY];
somewhere
If you want to add dynamically elements to an Array of Strings I would recommend you to do
private static ArrayList<String> name = new ArrayList<String>();
and then use below to add Strings:
name.add(temp);
If you know the size that it will have, then you can create an array like this:
private static String[] name = new String[10]; //if it's going to have 10 elements (typo corrected)
The problem is you have not initialized your string array.
You can declare and initialize it this way:
private static String[] name = new String[4]; Where '4' is the size of your array.
or:
private static String[] name = {temp, temp2, temp3}; Where the temps are each individual item in the array.
At the point
private static String[] name;
in your code, 'name' is still null.
for an array of Strings you have to declare the (constant) number of strings you want to store.
int n = 10;
private static String[] name = new String[n];
You then cannot ever write more than n strings to your array.
If you want to have the number of strings dynamically, you have to use a Vector<String> or an ArrayList<String>. Both objects use the myStrings.add(String string)-method to add a string and you can access strings by calling myStrings.get(int position).
