No matter how carefully you design and test your program, errors are bound to happen one or the other. When they do, chances are your program crashes to a halt.
In this chapter you will see what happens when Java encounters an unexpected situation. Many techniques have been invented to deal with such errors.
in Many languages such as C and Assembly, errors must be manually checked and handled by using error codes. This technique is very verbose and inelegant. Java provides a sophisticated error handling mechanism. Java implements an object-oriented approach to handling such situations known as exceptions.
In Java, an exception is an object which represents an unexpected situation in your program at runtime. In other words, an exception is an error that occurs when your program is running. Exceptions allow your programs to recognize errors and respond to them gracefully. In fact, sometimes your program can resolve the situation and resume execution normally.
In this chapter you will learn about handling exceptions in Java.