1  /**

  2     This example demonstrates variables and assignments.

  3  */

  4  

  5  public class VariableDemo

  6  {

  7     public static void main(String[] args)

  8     {

  9        int width = 10; // Declares width and initializes it with 10

 10        System.out.print("width: ");

 11        System.out.println(width);

 12  

 13        width = 20; // Changes width to 20

 14        System.out.print("width: ");

 15        System.out.println(width);

 16  

 17        int height = 20;

 18        width = height + 10; // The right hand side can be an expression

 19        System.out.print("width: ");

 20        System.out.println(width);

 21  

 22        width = width + 10; // The same variable can occur on both sides

 23        System.out.print("width: ");

 24        System.out.println(width);      

 25     }

 26  }