May 7, 2024 - List of checked & unchecked Java exceptions with links to their corresponding guide. 1.InvocationTargetException 2.NoSuchMethodException....

January 8, 2024 - Some common unchecked exceptions in Java are NullPointerException, ArrayIndexOutOfBoundsException and IllegalArgumentException. The RuntimeException class is the superclass of all unchecked exceptions, so we can create a custom unchecked exception ...

Thus, the compiler does not require that you catch or specify runtime exceptions (although you can). One case where it is common practice to throw a RuntimeException is when the user calls a method incorrectly. For example, a method can check if one of its arguments is incorrectly null. If an argument is null, the method might throw a NullPointerException, which is an unchecked exception.

This page provides a complete list of all public exceptions and errors available in the Java API, grouped by package.

October 2, 2025 - Unchecked exceptions include all subclasses of the RuntimeException class, as well as the Error class and its subclasses. The separation into checked and unchecked exceptions sounded like a good idea at the time.

August 12, 2023 - In conclusion, understanding the distinction between checked and unchecked exceptions is crucial for effective error handling in Java. By using these exception types appropriately and following best practices, developers can create more robust and reliable applications that gracefully handle errors and unexpected situations. ... Official documentation on exceptions in Java by Oracle.

List<String> list = new ArrayList<>(); String item = list.get(3);The get() method of the ArrayList class can throw IndexOutOfBoundsException but the code doesn’t have to catch because it is an unchecked exception.See common unchecked exceptions in the section 4 below. Common checked exceptions defined in the java.lang package: ReflectiveOperationException ·

October 7, 2022 - It is a run time exception. It is thrown when a null value is assigned to a reference object and the program tries to use that null object. It occurs when we access an array with an invalid index. This means that either the index value is less than zero or greater than that of the array’s length. It is a type of unchecked exception that occurs when we are trying to convert a string to an int or other numeric value.

April 30, 2025 - 3. Examples of checked exceptions are IOException, SQLException, ClassNotFoundException, etc whereas, examples of unchecked exceptions are ArithmeticException, ClassCastException, NullPointerException, IllegalArgumentException, etc.

NoClassDefFoundError extends LinkageError Thrown if the Java Virtual Machine or a ClassLoader instance tries to load in the definition of a class (as part of a normal method call or as part of creating a new instance using the new expression) and no definition of the class could be found. The searched-for class definition existed when the currently executing class was compiled, but the definition can no longer be found. Checked Exceptions IOException extends Exception Signals that an I/O exception of some sort has occurred.

July 23, 2025 - Runtime Exceptions like ... Exceptions which are faced generally by programmers namely IndexOutOfBoundsExcepetion and NullPointerException....

December 20, 2022 - The strange thing is that RuntimeException is itself subclass of Exception i.e. all unchecked exception classes should have been checked exceptions implicitly, BUT they are not.” · The code in the given program does not give any compile-time error. But when we run the example, it throws NullPointerException. NullPointerException is an unchecked exception in Java.

July 24, 2025 - public class UncheckedExceptionExample { public static void main(String[] args) { int a = 10, b = 0; int result = a / b; // This will throw ArithmeticException System.out.println("Result: " + result); } } Exception in thread "main" java.lang.ArithmeticException: / by zero at UncheckedExceptionExample.main(UncheckedExceptionExample.java:4)

Some exceptions are actually what are called unchecked exceptions. In our discussion of the exception hierarchy, we mentioned that these are (a) RuntimeExceptions: things like NullPointerException that could pretty much occur 'at any time' due to a programming error; and (b) Errors: serious errors that we basically don't expect to deal with except "in emergency", such as OutOfMemoryError.

March 19, 2025 - Use Checked Exceptions for situations ... of failure and can take action (e.g., retry, inform user). Use Unchecked Exceptions for programmer errors or unexpected conditions that indicate a bug in the code. Understanding these differences helps in designing robust and maintainable Java applications, ...

October 25, 2022 - As we know that all three occurrences of checked exceptions are inside main() method so one way to avoid the compilation error is: Declare the exception in the method using throws keyword. You may be thinking that our code is throwing FileNotFoundException and IOException both then why we are declaring the IOException alone. The reason is that IOException is a parent class of FileNotFoundException so it by default covers that. If you want you can declare them like this public static void main(String args[]) throws IOException, FileNotFoundException. import java.io.*; class Example { public static void main(String args[]) throws IOException { FileInputStream fis = null; fis = new FileInputStream("B:/myfile.txt"); int k; while(( k = fis.read() ) != -1) { System.out.print((char)k); } fis.close(); } }

November 6, 2024 - Error is also a type of unchecked exception. 1. Checked Exception in Java: The exception classes which directly inherit from the Throwable class with an exception of RuntimeException and Error are checked exceptions. They are checked during compilation time.

December 24, 2020 - Let us learn about unchecked exceptions in Java Please enter the first number 13 Please enter the second number 0 Java faced ‘/ by zero ‘ exception. Java thinks you entered a wrong input there. Please check and re-run the program. At last, we are at the end of our article, checked and unchecked exceptions in Java.