The Throwable class provides the following commonly used methods.
• String getMessage (): It returns the description of the exception. It includes fully qualified name of the Exception class and a brief description of the exception.
• void printStackTrace(): Prints the Throwable object and its stack trace information on the console.
• String toString (): It returns the String object containing a description of the exception. This description includes the full name of the Exception class followed by comma and a space and the string returned from the getMessage () method.
• StackTraceElement [] getStackTrace(): It returns an array that contains the stack trace, one element at a time as an array of stack trace elements. The method at the top of the stack is the last method called before the exception was thrown.
• void printStackTrace (PrintStream s): This is same as printStackTrace () method except that you specify the output stream as an argument.
• Throwable fillInStackTrace (): It returns a Throwable object that contains a completed stack trace. This object can be rethrown.
The following program demonstrates the use of Throwable methods to display exception information when an exception is thrown.
public class ThrowableMethods
{
static void A()
{
int x = 12 ;
int y = 0 ;
int z = x/y;
}
public static void main(String[] args)
{
try
{
A();
}
catch(ArithmeticException e)
{
System.out.println("Displaying stack trace information...");
e.printStackTrace();
System.out.println("\nDescription of the exception : "+e.getMessage());
System.out.println("\nString containong Description of the exception");
System.out.println(e.toString());
}
}
}
Dinesh Thakur holds an B.C.A, MCSE, MCDBA, CCNA, CCNP, A+, SCJP certifications. Dinesh authors the hugely popular Computer Notes blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps. For any type of query or something that you think is missing, please feel free to Contact us.
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