CodesJava

Easy learning with example program codes

Nested try block in java


Nested try block: 

try block inside try block is known as nested try block.

Note: Exception handler must be also nested in case try block is nested.

Syntax of nested try block:

try{         //block of statements

         try{

                  //block of statements

            }catch(Exception handler class){

               }

}catch(Exception handler class){

}

Example:

NestedTryExample.java

/**
 * This is a simple program used to show 
 * the use of nested try block.
 * @author codesjava
 */
class ArithmaticTest{
	int array[]={10,20,30,40};
	int num1 = 50;
	int num2 = 10;
 
	/**
	 * This method is used to show the use of nested try block.
	 * @author codesjava
	 */
	public void multipleCatchTest(){
	 try{
	  try{
	   //java.lang.ArithmeticException here if num2 = 0.
	   System.out.println(num1/num2);
	   System.out.println("4th element of given array = " + array[3]);
 
	   //ArrayIndexOutOfBoundsException here.
	   System.out.println("5th element of given array = " + array[4]);
           //Compile time error here.
           }catch(ArrayIndexOutOfBoundsException e){
		//print exception.
		System.out.println(e);
	   }catch(ArithmeticException e){//catch ArithmeticException here.
		//print exception.
		System.out.println(e);
	   }
 
	   int num = Integer.parseInt("30");
	   System.out.println(num);
          //catch NumberFormatException here.
	  }catch(NumberFormatException e){
		//print exception.
		System.out.println(e);
	  }
 
	 System.out.println("Remaining code after exception handling.");
       }
}
 
public class NestedTryExample {
	public static void main(String args[]){
		//creating ArithmaticTest object
		ArithmaticTest obj =  new ArithmaticTest();
 
		//method call
		obj.multipleCatchTest();
	}
}

Output:

5
4th element of given array = 40
java.lang.ArrayIndexOutOfBoundsException: 4
30
Remaining code after exception handling.

Download this example.
 
Next Topic: Finally in java with example.
Previous Topic: Multiple catch blocks in java with example.

Related Topics:

Some important terms for Exception Handling.
Exception handling in java.
try and catch blocks in java with example.
Multiple catch blocks in java with example.
Nested try block in java with example.
Finally in java with example.
throw in java with example.
throws in java with example.
Exception propagation in java with example.
Exception handling with method overriding in java.
Custom exception in java with example.
Commonly used exception methods of Throwable class in java.

 

Core Java Tutorial

Programming language overview.
Overview of Java.
Java features
JVM architecture details.
JVM, JRE and JDK.
Java Coding Guidelines.
Some important definitions.
Variable and data types.
Hello world java program.
Core java examples programs.
Important Java Programs.
How to set permanent path in java?
OOPs Basics.
Object and Class in Java.
OOPs Principles/Concepts.
Abstraction in java.
Encapsulation in java.
Polymorphism in java.
Method overloading in java.
Method overriding in java.
Dynamic method dispatch.
Runtime polymorphism.
Association in java.
Inheritance in java.
Aggregation in java.
Command line arguments in java.
Command line argument program in eclipse.
Read input from command line using Scanner.
Java array programs
Java star pattern programs
Java number pattern programs
final in java.
Abstract class in java.
Interface in java.
Custom marker Interface in java.
Constructor in java.
Package in java.
Access modifier in java.
Static import in java.
Package class in java.
this in java.
Instance initialize block.
Anonymous block.
super in java.
Static in java.
final in java.
Java cloning deep and shallow
Shallow vs Clone copy
String handling in java.
String handling programs.
StringBuffer in java.
StringBuilder in java.
Exception Handling Tutorial.
Multithreading Tutoial.
Java input output stream tutorial.
Collections framework in java tutorial.
Collections framework programs.
Java Random class
Java annotations.
Java design principles.
Java 7 features
Java 8 features
Java networking tutorial
Java Reflection tutorial


Copyright © 2018 CodesJava DMCA.com Protection Status SiteMap