Java Tutorial/Class Definition/New

Creating Objects

1. Using the new keyword.
2. new is always followed by the constructor of the class.

For example, to create an Employee object, you write:

   <source lang="java">

Employee employee = new Employee();</source>

When an object is created, the JVM also performs initialization that assign default values to fields.

Memory Leak Demo

   <source lang="java">

class List {

 MemoryLeak mem;
 List next;

} class MemoryLeak {

 static List top;
 char[] memory = new char[100000];
 public static void main(String[] args) {
   for (int i = 0; i < 100000; i++) {
     List temp = new List();
     temp.mem = new MemoryLeak();
     temp.next = top;
     top = temp;
   }
 }

}</source>