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The following example shows how to handle multiple exceptions. For example, if the user enters a zero in the second text field and Java tries to divide the first number by the zero, an ArithmeticException exception is raised. So, what if there are two exceptions to deal with i.e: the NumberFormatException and the ArithmeticException. This means there are multiple exceptions to be handled.

The good news is that there is no limit to the number of catch blocks. The catch blocks can be generated for any exception that the program generates.

The below program show how to handle multiple exceptions in java programming.

/* =========================================================== File Name : HandMulExcepApp.java WebSite : http://javaproglang.blogspot.in/ Facebook : https://www.facebook.com/AdvanceJavaProgramming Twitter ID : https://twitter.com/AdvanceJava Created By : Bintu Chaudhary =========================================================== */ import javax.swing.*; import java.awt.event.*; import java.awt.*; public class HandMulExcepApp extends JApplet implements ActionListener { String ansStr, strFirst, strSecond; JLabel lblFirst,lblSecond,lblAns; JTextField txtFirst,txtSecond; Container contPane; public void init() { contPane = getContentPane( ); contPane.setLayout(null); lblAns = new JLabel (); lblFirst = new JLabel ("Enter the first number:"); txtFirst = new JTextField ( ); lblSecond = new JLabel ("Enter the second number:"); txtSecond = new JTextField ( ); lblFirst.setBounds(75,15,175,25); txtFirst.setBounds(230,15,100,25); lblSecond.setBounds(75,70,175,25); txtSecond.setBounds(230,70,100,25); lblAns.setBounds(120,150,500,40); contPane.add(lblFirst); contPane.add(txtFirst); contPane.add(lblSecond); contPane.add(txtSecond); contPane.add(lblAns); Font font = new Font("TimesRoman", Font.PLAIN, 24); lblAns.setFont(font); txtFirst.addActionListener(this); txtSecond.addActionListener(this); } public void actionPerformed (ActionEvent actEvt) { try { strFirst = txtFirst.getText(); strSecond = txtSecond.getText(); int intFirst = Integer.parseInt(strFirst); int intSecond = Integer.parseInt(strSecond); int answer = intFirst / intSecond; ansStr = String.valueOf(answer); lblAns.setText("The answer is :" + ansStr); } catch(NumberFormatException numFmtExcep) { lblAns.setText("Invalid Number"); } catch(ArithmeticException arithExcep) { lblAns.setText("Divisionn by 0, this is NOT ALLOWED in Math"); } } }

<HTML> <HEAD> <TITLE> This is an Applet Test </TITLE> </HEAD> <BODY> <APPLET Code="HandMulExcepApp.class" Width=500 Height=300> </APPLET> </BODY> </HTML>

C:\>jdk1.4\bin>javac HandMulExcepApp.java
C:\>jdk1.4\bin>appletviewer HandMulExcepApp.html

The actionPerformed() in the above code uses two catch program blocks, one each for the NumberFormatException and ArithmeticException exceptions.

The ArithmeticException is raised when a number is divided by zero. In above Diagram the first number i.e. 10 is divided by the second number i.e. 0. This gives a message i.e. "Division by 0, this is NOT ALLOWED in Math".

Download Complete Program

Java Exception Handling

Catching Java Exceptions	Catching a RunTime Exception
Handling Multiple Exceptions	The finally Clause
Creating User-defined Exceptions

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Handling Multiple Exceptions

Java Exception Handling

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