Arrays in Java function in a similar fashion to arrays in C++, but the way you declare and initialize them differ considerably. Any array in Java is treated as an object. When you create an array in Java, it is equivalent to instantiating an array on the heap in C++. Example:

One Dimensional Arrays
Java:   String[] MyArray = new String[5];
C++:   CString * MyArray = new CString[5];

One Dimensional Arrays
Java:   String[][] MyArray = new String[8][8];
C++:   CString * MyArray = new CString[8][8];

Java will automatically size multi-dimensional arrays according to the number of elements. example:

Java:   String[][] MyArray = {   {"Question1", "Answer 1"},  {"Question 2","Answer 2" }   };

Explicit assignment in 2 dimensional array:

MyArray[0][0] = "test";

You can see by the example above that Java is hiding some pointer magic beneath its hood.

 Example 1- One Dimensional Array:

import javax.swing.*; public class CreatingAClass {       public void main(String[] args)       {              String[] MyArray = new String[5];              for(int x = 0; x < 5; x++)              {                    MyArray[x] = JOptionPane.showInputDialog(null,                                 "Input value " + x + ": ");              }                         System.out.println("Here are the values you typed: ");              for(int x = 0; x < 5; x++)              {                  System.out.print("Value " + x + ": " + MyArray[x] + "\n");              }                           System.exit(0);       }//close main() function   }//close CreatingAClass class

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 Example 2 - Two Dimensional Array:

import javax.swing.*; public class CreatingAClass {       public void main(String[] args)       {              String[][] MyArray = {                                         {"Last Name", "Germany"},                                        {"Favorite Color", "Blue"}                                     };              for(int x = 0; x < 5; x++)              {                  System.out.print(MyArray[x][0] + " : " + MyArray[x][1] + "\n");              }                           System.exit(0);       }//close main() function   }//close CreatingAClass class

 Example 3 - Using Arrays:

import java.util.*; import javax.swing.*; public class Array1 { public static int counter = 0; //global public static void main(String[] args) { int NumElements = 0; int x = 0; String entry= ""; String ChoiceString = ""; NumElements = Integer.parseInt(JOptionPane.showInputDialog(null, "How many elements shall I create in the array?")); String[] TheChoices = new String[NumElements]; Arrays.fill(TheChoices, "0123456789"); TheChoices[x] = JOptionPane.showInputDialog(null, "Enter items to add to the array. Enter \"quit\" to quit"); while(!TheChoices[x].equals("quit") && x < TheChoices.length) { //Accumulate the choices from the array and add a line ChoiceString = ChoiceString + TheChoices[x] + "\n"; ++x; if(x < TheChoices.length) { TheChoices[x] = JOptionPane.showInputDialog(null, "Enter items to add to the array. Enter \"quit\" to quit"); } } entry = JOptionPane.showInputDialog(null, "Today's menu is\n" + ChoiceString + "Please make a selection"); for(int z = 0; z < TheChoices.length; z++) { if(TheChoices[z].equals(entry)) { JOptionPane.showMessageDialog(null, "I found the item in the array!"); break; } else { counter = counter + 1; } } if(counter == TheChoices.length) { JOptionPane.showMessageDialog(null, "That item was not found."); } System.exit(0); }//close main() }//close class

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