| All exceptions in Java are subclassed from the class Throwable. |
| If we want to create your own exception classes, we must subclass Throwable. Most Java programs do not have to subclass their own exception classes. |
| Following is the public portion of the class definition of Throwable: |
| public class Throwable { public Throwable() ; public Throwable(String message) ; public String getMessage() public String toString() ; public void printStackTrace() ; public void printStackTrace( java.io.PrintStream s) ; private native void printStackTrace0( java.io.PrintStream s); public native Throwable fillInStackTrace(); } |
| Java exceptions are Throwable objects (they are instances of Throwable or a subclass of Throwable). The Java packages contain numerous classes that derive from Throwable and thus, build a hierarchy of Throwable classes. |
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