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These exceptions are hard to debug and we might need to look into each place where we are using that type of resource to make sure we are closing it.So java 7 one of the improvement was try-with-resources where we can create a resource in the try statement itself and use it inside the try-catch block.
Java being an object oriented programming language, whenever an error occurs while executing a statement, creates an exception object and then the normal flow of the program halts and JRE tries to find someone that can handle the raised exception.The catch block with this feature looks like below: There are some constraints such as the exception object is final and we can’t modify it inside the catch block, read full analysis at Java 7 Catch Block Improvements.Most of the time, we use finally block just to close the resources and sometimes we forget to close them and get runtime exceptions when the resources are exhausted.The exception object contains a lot of debugging information such as method hierarchy, line number where the exception occurred, type of exception etc.When the exception occurs in a method, the process of creating the exception object and handing it over to runtime environment is called “throwing the exception”.Java Exception and all of it’s subclasses doesn’t provide any specific methods and all of the methods are defined in the base class Throwable.
The exception classes are created to specify different kind of exception scenarios so that we can easily identify the root cause and handle the exception according to it’s type.When the execution comes out of try-catch block, runtime environment automatically close these resources.Sample of try-catch block with this improvement is: Read a detailed explanation of this feature at Java 7 Automatic Resource Management.Throwable is the parent class of Java Exceptions Hierarchy and it has two child objects – Error and Exception.Exceptions are further divided into checked exceptions and runtime exception.Exception Handling in Java is a very interesting topic.