What is 'finalize()' method in Java, why is it used and what could have been the problems if this method was not there?

Answer 1

Finalize is a method.Finalize is used to perform clean up processing just before object is garbage collected.
The finalize() method is invoked each time before the object is garbage collected. This method can be used to perform cleanup processing. This method is defined in Object class as.

public class TestGarbage1{  
 public void finalize(){System.out.println("object is garbage collected");}  
 public static void main(String args[]){  
  TestGarbage1 s1=new TestGarbage1();  
  TestGarbage1 s2=new TestGarbage1();  
  s1=null;  
  s2=null;  
  System.gc();  
 }  
}