what are exceptions in java

In Java, an exception is an event that occurs during the execution of a program, disrupting the normal flow of instructions. There are several types of exceptions in Java, including checked exceptions, unchecked exceptions, and errors. Checked exceptions are checked at compile time, while unchecked exceptions are not checked at compile time but are checked at runtime. Errors are irrecoverable. Additionally, Java allows users to define their own exceptions, which are called user-defined exceptions