Throwing our Own Exceptions in Java
https://www.computersprofessor.com/2016/11/throwing-our-own-exceptions-in-java.html
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Throwing our exceptions:
There may be times when we
would like to throw our exception we can do this by using the keyword throw
as follows.
Ex : throw new
ArithmeticException ( );
throw new NumberFormatException ( ) ;
Note that exception is a
subclass of throw able and therefore myException is a subclass of throw able
class. A object of a class that extends throwable can be thrown and caught.
import java .lang. Exception;
class myException (String
message)
{
super
(message);
}
class testMyException
{
public static void main (String args[ ] )
{
int
x= 5, y=100;
try
{
float z =(float)
x/(float)y ;
if(z < 0.01)
{
throw new myException
(“ number is too small) ;
}
}
catch ( myException
e)
{
System.out.println
(“ caught my exception”);
System.out.println
(e. getMessage ( ) );
}
finally
{
System.out.println
(“ I am always here”);
}
}
}
The object which contains
the error message.“Number is too small” is caught by catch block. which then
displays the message using the getMessage ( ) method.
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