Home Java Java-exception Example to show cast exception in java
Questions:Ask|Latest

 
 

Share on Google+Share on Google+

Example to show cast exception in java

Advertisement
Here we are describing the use of using exception class in java .Exceptions are the way in Java to indicate to a calling method that an abnormal condition has occurred.

Example to show cast exception in java

     

In this Tutorial we want to describe you a program that makes understand cast exception in java. The casting mean converting one data type into another data type. The tutorial illustrates to handle cast exception in your programs.

The example will show you to convert one data type into another data type by using type casting. The step  involved in the program are given below-

Vector v = new Vector():-Creates a new vector.

Object obj = v.add( i ):-
Adds an integer type to the vector and stores in an object

To avoid this exception we have to add Integer y = new Integer((String)obj) instead of  String y = (String)obj.

CastException.java

import java.util.Vector;

public class CastException {

  public static void main(String[] args) {
  Vector v = new Vector();
  int i = 10;
  Object obj = v.add(i);
  try {
  String y = (String)obj;
  v.add(y);
 catch (ClassCastException e) {
  System.out.println("Class is really: " + obj.getClass().getName());
  e.printStackTrace();
  }
  }
}

 

Output of the program

java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.String
at CastException.main(CastException.java:11)


To avoid this exception we have to add Integer y = new Integer((String)obj) instead of String y = (String)obj.

 

Download SourceCode

Advertisements

If you enjoyed this post then why not add us on Google+? Add us to your Circles



Liked it!  Share this Tutorial


Follow us on Twitter, or add us on Facebook or Google Plus to keep you updated with the recent trends of Java and other open source platforms.

Posted on: October 23, 2008

Related Tutorials

Ask Questions?    Discuss: Example to show cast exception in java   View All Comments

Post your Comment


Your Name (*) :
Your Email :
Subject (*):
Your Comment (*):
  Reload Image
 
 
Comments
Balu
July 6, 2011
Above programme not working

The Above sample program you posted is not working.
mike
August 23, 2012
confused...

Sorry for asking but where should I put the CastException.java file ... I'm a noob and i want to solve a minecraft problem. if you can help me I'll be thankful for ever!
DMCA.com