Return string

Question

I am trying to return a string from a method in a class called information. I am having no joy at all
Here is a snippet of code:
//class I am calling the method in
final String[] name=new String[10];
  name=x.ComponentName();
import java.util.*;
public class Information
String[] name=new String[20];
   public String[] ComponentName()
      name[20]="Test";
      return name;

Answer 1

This is what your code does:
final String[] name=new String[10];
- This declares a variable called 'name', which is an array of strings, and you allocate a new array containing 10 strings.
name=x.ComponentName();
- This calls ComponentName() in object x. This will probably give you a compiler error, because 'name' is final (which means you cannot assign another value to it).
public class Information {
String[] name = new String[20];
- Here you start a new class with a member variable called 'name', which is initialised with a new array of length 20. Note that this is not the same variable as the one you used above.
public String[] ComponentName() {
name[20]="Test";
return name;
- Here you have the method ComponentName(). The first line of the method body, where you assign "Test" to the 21st (note!) element of the array, will throw an ArrayIndexOutOfBoundsException. The array contains only 20 elements (name[0] to name[19]). You return a reference to the member variable in class Information.
Jesper