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“exceptions in java” Code Answer’s

what is exception in java

java by Thankful Tuatara on Dec 01 2020 Donate

In java exception is an object. Exceptions are created when an abnormal 
situations are arised in our program. Exceptions can be created by JVM or 
by our application code. All Exception classes are defined in java.lang. 
In otherwords we can say Exception as run time error.

how do you handle exceptions in java

java by Thankful Tuatara on Nov 28 2020 Donate

I use try & catch blocks to handle any exceptions in my code. 
  I am familiar with major checked and unchecked exceptions and 
  handle it accordingly to make my code execution smooth

throwing exceptions java

java by Condemned Cormorant on May 08 2020 Donate

/* In this program we are checking the Student age
 * if the student age<12 and weight <40 then our program 
 * should return that the student is not eligible for registration.
 */
public class ThrowExample {
   static void checkEligibilty(int stuage, int stuweight){ 
      if(stuage<12 && stuweight<40) {
         throw new ArithmeticException("Student is not eligible for registration"); 
      }
      else {
         System.out.println("Student Entry is Valid!!"); 
      }
   } 

   public static void main(String args[]){ 
     System.out.println("Welcome to the Registration process!!");
     checkEligibilty(10, 39); 
     System.out.println("Have a nice day.."); 
 } 
}

Source: beginnersbook.com

exception in java

java by Obedient Ocelot on Dec 05 2020 Donate

In java exception is an object. Exceptions are created when an abnormal 
situations are arised in our program. Exceptions can be created by JVM or 
by our application code. All Exception classes are defined in java.lang. 
In otherwords we can say Exception as run time error. I use try & catch blocks 
to handle any exceptions in my code. 
  I am familiar with major checked and unchecked exceptions and 
  handle it accordingly to make my code execution smooth

exception java

java by Outstanding Opossum on Mar 09 2021 Donate

Exceptions topic:
		unchecked & checked exception
		try & catch blocks
		multi-catch blocks
		finally block
		throws
		throw
		Custom Exception
next topic: final keyword
Exceptions: unexpected or unwanted events
	there two types of exception:
			unchecked (unexpected event): occurs during run time
				RuntimeException class is the parent of all exceptions
			checked (unwanted events): occurs during the compile time. needs to be handled IMMEDIATELY
exception handling:
	try & catch: blocks, used for handling the exception 
			try{
				exception statements/code
			}catch(ExceptionClass  VariableName){}
			printStackTrace(): prints the stack trace of exception
			getMessage(): discription of exception
			try{
			}catch(Runtime){
			}catch(Arithmetic){
			}
		
if it is during runtime it is unchecked
if it does not compile it is checked

multi-catch block: parent exception class CAN NOT be placed before its child exception
finally: always gets executed regardless of the exception
		try{
		}catch(){
		}finally{
		}
Thread.sleep(long millisecond): makes the current execution thread to wait for specific amount of time
throws: used for handling checked exceptions. indicates that the methods throws an exception
		MUST be used in method signature
	public static void method() throws Exception
		the caller of the method is responsible for handling the exception
		we can throw multiple exception. 
				order: child first, then parent
throw: manually throwing the exception, DOES NOT HANDLE
	object: new ExceptionClass();
	throw Object;
	Ex:
		throw new RuntimeException();
custom exception:
	how to create custom unchecked exception?
				A: by extending RunTimeException class
 
	how to create custom checked exception?
				A: by extending Exception class
Exception topic:
		checked & unchecked, try& catch, multi-catch block, finally block, throw, throws, custom exception

exceptions in java

java by Thankful Tuatara on Dec 30 2020 Donate

-1

Unchecked:
-IndexOutOfBounds exception(while working with arrays/strings)
-NullPointerException(if I forget to instantiate the objects)
-ArithmaticException

Checked:
-IOException
-SQLException
-FileNotFountException

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