INTERVIEW QUESTIONS J2EE CORE JAVA DETAILS

Question: What is the difference between throw and throws?

Answer: Throw:it is used to raise exception explicitly
that means it is use when a user defined exception is raised.

Throws:if a method is capable of throwing an exception but
it does not handle the exception that must be specified by using "throws" class.

Throw:it is used to raise exception explicitly
that means it is use when a user defined exception is raised.

Throws:if a method is capable of throwing an exception but
it does not handle the exception that must be specified by using "throws" class. Source: CoolInterview.com

they are not same.

"throws" declares that your method is capable of throwing an exception.

"throw" actually does the work of throwing the exception.

example :

public void doSomething() throws ApplicationException
{
try{
}
catch(Exception e){
// catch all excpetions n provide some meaningful message
throw ApplicationException("An error occurred while trying connect to DB");
}
}
Source: CoolInterview.com

Throw:it is used to raise exception explicitly
that means it is use when a user defined exception is raised.

Throws:if a method is capable of throwing an exception but
it does not handle the exception that must be specified by using "throws" class.

void Show()throws NullPointerException
{
throw new NullPointerException();
} Source: CoolInterview.com

Throw:it is used to raise exception explicitly
that means it is use when a user defined exception is raised.

Throws:if a method is capable of throwing an exception but
it does not handle the exception that must be specified by using "throws" class.

Source: CoolInterview.com

throw: it is used to generate an exception.
throws: it is used to forward an exception. Source: CoolInterview.com

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