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Tip of the Day
Language: Java
Expertise: Intermediate
Oct 8, 2001

Understanding Stack Trace


Stack trace is a collection of methods and objects that lists from the origin of the exception to the point where the nested call begins.
 
class StackTrace
{

    StackTrace()
    {
        divideByzero();
    }
    int divideByzero()
    {
        return 100/0;
    }
    static void main(String[]arr)
    {
        StackTrace s=new StackTrace();

    }
}

When the above code is executed, the output you get on the screen might look like this:
 
Exception in thread "main" java.lang.ArithmeticException: 
/ by zero
        at StackTrace.divideByzero(StackTrace.java:10)
        at StackTrace.(StackTrace.java:6)
        at StackTrace.main(StackTrace.java:14)

From the above code, you can see the line of execution of the program. It has to read from the bottom:

1. The main method is called.

2. The constructor (init) is called.

3. The method with the Exception is called.

This how an exception is propagated through the code.
M.V. Prem
 
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