Java Array Examples
Also see: http://www.java.sun.com/docs/books/tutorial/java/data/arrays.html

See notes at the bottom of the page, below the program listing...

public class JavaSamples
{
    public static void main(String args[])
    {
       char charArray[] = new char[10];
       String string1 = new String("Hello World");
       char charArray2[] = new char[80];
       int i;

       charArray[0] = 'A'; charArray[1] = 'B';
       charArray[2] = 'C'; charArray[3] = 'D';

/*  The above could also be initialized as:

       charArray[] = {'A','B','C','D'};
OR
       charArray[] = ("ABCD").toCharArray();
*/

       System.out.println("Printing the character array:");
       for(i = 0; i < charArray.length; i++) {
          System.out.println(charArray[i] + "  " + (int)charArray[i] +
                           "  " + Integer.toBinaryString((int)charArray[i]) +
                           "  " + Integer.toHexString((int)charArray[i]));
       }
       System.out.println();
     
       System.out.println("Printing the string:");
       for(i = 0; i < string1.length(); i++)
       {
          System.out.println(string1.charAt(i) + "  " + (int)string1.charAt(i) +
                         "  " + Integer.toBinaryString((int)string1.charAt(i)) +
                         "  " + Integer.toHexString((int)string1.charAt(i)));
       }
       System.out.println();
       
       System.out.println("Printing the string converted to a character array:");
       charArray2 = string1.toCharArray();
       for(i = 0; i < charArray2.length; i++) {
          System.out.println(charArray2[i] + "  " + (int)charArray2[i] +
                           "  " + Integer.toBinaryString((int)charArray2[i]) +
                           "  " + Integer.toHexString((int)charArray2[i]));
       }
       System.out.println();

    }
}       

• First, a character array is created:
  char charArray[] = new char[10]
  Note that a character array is different from a String class.
  Also, character arrays and Strings in Java do not have to end in the null
  character
• An instance of the String is created:
  String string1 = new String("Hello World");
  
• An alternative syntax is:
  String string1 = "Hello World";
  This version implies the new String() creation.
  Strings are special, and allow for this simpler syntax
• If you need to add more characters into a String or change the String,
  use StringBuffer
  (See the Java API site for more info on Strings and StringBuffers)
• In this example, characters are added individually into the char array
  An alternative syntax is: charArray = ("String value").toCharArray() OR
  charArray = someString.toCharArray();
• Another syntax to initialize arrays is:
  charArray = {'H','e','l','l','o',' ','W','o','r','l','d'};
• To add characters in a StringBuffer, use the append() method:
  strBuffer.append(someChar)
• In an array in Java, the .length field specifies the length of the array:
  charArray.length
• In a String in Java, the length() method specifies the length of the String:
  string1.length()
• To print the Unicode integer representation of a character use a typecast:
  (int) charArray[i]
• Java uses Unicode instead of ASCII to represent character values
• To print the binary and hexadecimal representations of the characters,
  use the toBinaryString() and toHexString() methods from the Integer class:
  Integer.toBinaryString((int)someChar) and
  Integer.toHexString((int)someChar)
  These two methods return a String