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();
}
}
}
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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.
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