Throws and finally Keyword

Author: Ravi Poswal

It determines the exception types that a method may throw. It can also declare multiple exceptions. It is used for system exceptions. A try-catch block may be used to handle any exceptions that are caught. However, you must use the throws keyword to declare an exception.

Syntax:

modifier return-type method_name(type parameter) throws exception

Code Example

class M
{ 
  static void fun() throws IllegalAccessException 
 { 
  System.out.println("Inside fun(). "); 
throw new IllegalAccessException("demo"); 
  } 
  public static void main(String args[]) 
 { 
   try
  { 
   fun(); 
  } 
    catch(IllegalAccessException e) 
 { 
System.out.println("caught in main."); 
}  } 
}

Finally

When an exception occurs, it is used to specify a block of the statement that must be performed. The try-or-catch block is always executed together with there. It is finally used for "cleanup" code, like terminating a file or connection.

Note:- If the JVM exits while the try or catch code is being executed, the finally block may not execute. 

Code Example

class Ex
{
public static void main(String args[])
{
try
{  
	int num=12/0;  
	System.out.println(num);  
}  
catch(ArithmeticException e)
{
System.out.println("Number should not be divided by zero");
       } 
finally
{
	System.out.println("This is finally block");
                                      }  }   
}

FAQs

It determines the exception types that a method may throw. It can also declare multiple exceptions. It is used for system exceptions. A try-catch block may be used to handle any exceptions that are caught. However, you must use the throws keyword to declare an exception.

When an exception occurs, it is used to specify a block of the statement that must be performed. The try-or-catch block is always executed together with there. It is finally used for "cleanup" code, like terminating a file or connection.

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