Why throwable is a class

Of course, if you like, you can break through this limitation, such as defining an exception class, inheritance. Throwable At the same time, other interfaces are implemented, so that this exception class can be used as other classes. But generally nobody does that, because inheritance interfaces need to implement all the methods in the interface. Why not redefine a more appropriate class to implement all the methods, redefine the skeleton Abstract class, and reduce the amount of code in the subclass?

Collectives on Stack Overflow. Learn more. Throwable a class? Ask Question. Asked 11 years, 5 months ago. Active 9 years, 2 months ago. Viewed 15k times. I am curious There is certainly no performance advantage, since checked versus unchecked exceptions is only enforced at compile time. I hope it would still be checked at compile time. The point is you gain some freedom with your base class.

It's just an idea, and I'm uncertain of the consequences, hence why I asked the question. Add a comment. Active Oldest Votes. Community Bot 1 1 1 silver badge. Java said it best! Next Page. Previous Page Print Page. Save Close. Dashboard Logout. Throwable This constructs a new throwable with null as its detail message. The parameters are:- message — the detail message. A null value is permitted, and indicates that the cause is nonexistent or unknown.

Methods: Apart from the above mentioned constructors, there are also many predefined methods available in the throwable class. They are: 1. Syntax: Public final void addSuppressed Throwable exception Returns: This method does not returns anything.

This method records information about the current state of the stack frames for the current thread within the current Throwable object. Syntax: public Throwable getCause Returns: the cause of current Throwable.

If the cause is nonexistent or unknown, it returns null. Syntax: public String getMessage Returns: the detailed message string of current Throwable instance may also return null 6.

It returns an array of stack trace elements, each representing one stack frame. It also represents as the top of the stack and is the point at which this throwable was created and thrown. Syntax: public StackTraceElement[] getStackTrace Returns: an array of stack trace elements representing the stack trace related to current Throwable.

If no exceptions were suppressed or suppression is disabled, an empty array is returned. Syntax: public final Throwable[] getSuppressed Returns: an array containing all of the exceptions that were suppressed to deliver this exception. This method can be called at most once. It is generally called from within the constructor, or immediately after creating the throwable.