What will happen if you do not specify an exception type in a catch block of Java?

In Java, if you do not specify an exception type in a catch block, it is treated as catching the base Throwable class. This means that you will catch all exceptions that are instances of the Throwable class, including checked exceptions, unchecked exceptions, and errors. Thus, this catch block will handle both Exception and Error types, making it a broad catch-all mechanism.

It's important to note that using such a broad catch can lead to catching exceptions that you might not want to handle in that context, such as OutOfMemoryError or StackOverflowError, which usually indicate serious problems that should not be simply caught and ignored.

By not specifying an exception type, you gain the ability to handle any exception that occurs within the associated try block, but this can come at the cost of making error handling less precise and potentially masking other issues.