Exception Handling with Method Overriding
Case 1: If SuperClass doesn’t declare any exception and subclass declare checked exception
package exceptionwithinheritance;
public class ParentException {
public String printName(String s1)
{
return "Parent Exception="+s1;
}
}
package exceptionwithinheritance;
import java.io.IOException;
public class ChildException extends ParentException {
public String printName(String s1) throws IOException
{
return "Child Exception="+s1;
}
{
return "Child Exception="+s1;
}
public static void main(String[] args) {
ParentException pe=new ChildException();
String ce = pe.printName("Java Technology");
System.out.println(ce);
ParentException pe=new ChildException();
String ce = pe.printName("Java Technology");
System.out.println(ce);
}
}
o/p- compile time error
==============================================================================================================================
Case 2: If SuperClass doesn’t declare any exception and SubClass declare Unchecked exception
Case 2: If SuperClass doesn’t declare any exception and SubClass declare Unchecked exception
package exceptionwithinheritance;
public class ParentException {
public String printName(String s1)
{
return "Parent Exception="+s1;
}
}
package exceptionwithinheritance;
import java.io.IOException;
public class ChildException extends ParentException {
public String printName(String s1) throws ArithmeticException
{
return "Child Exception="+s1;
}
{
return "Child Exception="+s1;
}
public static void main(String[] args) {
ParentException pe=new ChildException();
String ce = pe.printName("Java Technology");
System.out.println(ce);
ParentException pe=new ChildException();
String ce = pe.printName("Java Technology");
System.out.println(ce);
}
}
o/p:---------------
Child Exception=Java Technology
================================================================================================================================
case:-3
If SuperClass declares an exception and SubClass declares exceptions other than the child exception of the SuperClass declared Exception
If SuperClass declares an exception and SubClass declares exceptions other than the child exception of the SuperClass declared Exception
package exceptionwithinheritance;
public class ParentException {
public String printName(String s1) throws RuntimeException
{
return "Parent Exception="+s1;
}
}
package exceptionwithinheritance;
import java.io.IOException;
public class ChildException extends ParentException {
public String printName(String s1) throws Exception
{
return "Child Exception="+s1;
}
{
return "Child Exception="+s1;
}
public static void main(String[] args) {
ParentException pe=new ChildException();
String ce = pe.printName("Java Technology");
System.out.println(ce);
ParentException pe=new ChildException();
String ce = pe.printName("Java Technology");
System.out.println(ce);
}
}
o/p- compile time error
===============================================================================================================================
case:-4 If SuperClass declares an exception and SubClass declares an child exception of the SuperClass declared Exception.
package exceptionwithinheritance;
public class ParentException {
public String printName(String s1) throws RuntimeException
{
return "Parent Exception="+s1;
}
}
package exceptionwithinheritance;
import java.io.IOException;
public class ChildException extends ParentException {
public String printName(String s1) throws RuntimeException
{
return "Child Exception="+s1;
}
{
return "Child Exception="+s1;
}
public static void main(String[] args) {
ParentException pe=new ChildException();
String ce = pe.printName("Java Technology");
System.out.println(ce);
ParentException pe=new ChildException();
String ce = pe.printName("Java Technology");
System.out.println(ce);
}
}
o/p:----------------------------
Child Exception=Java Technology
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