int[] text = null;
....
text[i] = ....
Your array is null when you try to assign value to its element. You have to create array before this operation, i.e.
int[] text = new int[encoded.length()];
Domanda
I'm trying to change an input string into it's ASCII code. The string is of indeterminate length, and I need to operate on each characters code individually.
I had this working the other night, but for some reason it just won't now, and I can't figure out why... I get a null pointer exception at the indicated line...
Here is the entire method.
private void encodeEnableButtonActionPerformed(java.awt.event.ActionEvent evt)
{
String encoded = msgToEncrpt.getText();
int[] text = null;
for (int i=0; i<encoded.length(); i++)
{
text[i] = (int)encoded.charAt(i);//Exception occurs here.
System.out.println(text);
}
}
Soluzione 3
int[] text = null;
....
text[i] = ....
Your array is null when you try to assign value to its element. You have to create array before this operation, i.e.
int[] text = new int[encoded.length()];
Altri suggerimenti
You're trying to set an element of a null array. Change
int[] text = null;
to
int[] text = new int[encoded.length()];
The array text
is null
, so you can't access it until you initialize it.
int[] text = new int[encoded.length()];
Additionally, to print the array's contents properly, you'll need to call Arrays.toString
.
System.out.println(Arrays.toString(text));
The problem is here
int[] text = null;
You are not initializing the array properly. In order to add elements or interact with it at all, you need to initialize the array.
int[] text = new int[encoded.length()];