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Multi-catch block in Java

Answer»

Before Java 7 when we needed to handle more than one exception, we required multiple catch blocks to handle those exceptions.

Let us see an example:

import java.util.*; public class Example {    public STATIC void main(String args[])    {        Scanner SC = new Scanner(System.in);        try        {            int n=INTEGER.parseInt(sc.next());            System.out.println(n/0);        }        catch (ArithmeticException ex)        {            System.out.println("Exception caught " + ex);        }        catch (NumberFormatException ex)        {            System.out.println("Exception caught " + ex);        }    } }

The output here depends on the input.

When we input an integer it will generate an arithmetic exception.

For the following input:

3

The output would be as follows:

$javac Example.java $java ExampleException caught java.lang.ArithmeticException: / by zero

For a String or character input, the output would be different.

For the following input:

Hello

The output would is as follows:

$javac Example.java $java Example Exception caught java.lang.NumberFormatException: For input string: "Hello"

From Java 7, the multi-catch block was INTRODUCED in Java

A single catch block could catch multiple exceptions which are separated | symbol.

Let us see an example for the multi-catch block:

import java.util.*; public class Example {    public static void main(String args[])    {        Scanner sc = new Scanner(System.in);        try        {            int n=Integer.parseInt(sc.next());            System.out.println(n/0);        }        catch (NumberFormatException | ArithmeticException ex)        {            System.out.println("Exception caught " + ex);        }    } }

When we input an integer it will generate an arithmetic exception.

For the following input:

3

The output would be as follows:

$javac Example.java $java Example Exception caught java.lang.ArithmeticException: / by zero

For a String or character input, the output would be different.

For the following input:

Hello

The output would is as follows:

$javac Example.java $java Example Exception caught java.lang.NumberFormatException: For input string: "Hello"


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