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Showing content from https://www.geeksforgeeks.org/java/throwable-tostring-method-in-java-with-examples/ below:

Throwable toString() method in Java with Examples

Last Updated : 06 Feb, 2019

The

toString()

method of

Java.lang.Throwable class

used to return a String representation of this Throwable which consists of the name of the class of this object, a colon and a space(": ") and a string which is same as result of invoking this object's getLocalizedMessage() method and If getLocalizedMessage returns null, then just the class name is returned.

Syntax:

public String toString()

Return Value:

This method returns

String representation

of this Throwable if a Exception occurs. Below programs illustrate the toString() method of Throwable class:

Example 1: Java


 // Java program to demonstrate
// the toString() Method.

import java.io.*;

class GFG {

    // Main Method
    public static void main(String[] args)
        throws Exception
    {

        try {

            testException();
        }

        catch (Throwable e) {

            // print using tostring()
            System.out.println("Exception: "
                               + e.toString());
        }
    }

    // method which throws Exception
    public static void testException()
        throws Exception
    {

        throw new Exception("New Exception Thrown");
    }
}

Output:

Exception: java.lang.Exception: New Exception Thrown

Example 2: Java


 // Java program to demonstrate
// the toString() Method.

import java.io.*;

class GFG {

    // Main Method
    public static void main(String[] args)
        throws Exception
    {
        try {

            // divide two numbers
            int a = 4, b = 0;

            int c = a / b;
        }
        catch (Throwable e) {

            // print using tostring()
            System.out.println("Exception: "
                               + e.toString());
        }
    }
}

Output:

Exception: java.lang.ArithmeticException: / by zero

References: https://docs.oracle.com/javase/10/docs/api/java/lang/Throwable.html#toString()

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