Runtime exceptions in java

RuntimeExceptions are those exceptions which are checked at runtime. RuntimeException is the superclass of all those exceptions that can be thrown during the normal execution of the Java program. These are also called as unchecked exceptions. RuntimeException and their subclasses are known as unchecked exceptions. RuntimeExceptions can be avoided by programmer.

Examples – ArithmeticException, ArrayStoreException, CannotRedoException, CannotUndoException, ClassCastException, CMMException, ConcurrentModificationException, EmptyStackException, IllegalArgumentException, IllegalMonitorStateException, IllegalPathStateException, IllegalStateException, ImageFormatException, ImagingOpException, IndexOutOfBoundsException, MissingResourceException, NegativeArraySizeException, NoSuchElementException, NullPointerException, ProfileDataException, ProviderException, RasterFormatException, SecurityException, SystemException, TruncatedFileException, UnsupportedOperationException etc.

public class Main { 
 
	public static void main(String[] args) 
	{ 
		int a= 30, b = 0; 
 
		// Try to divide by zero 
		try { 
			int result = a / b; 
		} 
		catch (ArithmeticException e) { 
		    System.out.println(e.getClass().getName());
			e.printStackTrace(); 
		} 
	} 
}

Output

java.lang.ArithmeticException 
java.lang.ArithmeticException: / by zero
        at Main.main(Main.java:9)

Java interview questions on Exception Handling

• what is an exception?
• How the exceptions are handled in java?
• What is the difference between error and exception in java?
• Can we keep other statements in between try catch and finally blocks?
• Explain the exception hierarchy in java?
• What are runtime exceptions in java?
• What is outofmemoryerror in java?
• What are checked and unchecked exceptions in java?
• What is the difference between classnotfoundexception and noclassdeffounderror in java?
• Will finally block get executed if return?
• Can we throw an exception without throws?
• What is rethrowing an exception in java?
• What is the use of throws keyword in java?
• What is exception propagation in java?
• Difference between throw and throws in java?
• What is finally in java?
• What is the difference between final finally and finalize in java?
• How to create customized exceptions in java?
• What is classcastexception in java?
• What is stackoverflowerror in java?
• What is the superclass of all exception classes?
• What is the use of printstacktrace method in java?
• What is arraystoreexception in java?