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Theoretically, the finally block will execute no matter what. But practically, the following scenarios can prevent the execution of the finally block.
* The death of thread
* Use of system.exit()
* Turning off the power to CPU
* An exception arising in the finally block itself
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Beau
Ross
CoachThe whole POINT of the "finally" block is to have code that ALWAYS executes. While there might be rare circumstances where it doesn't execute (the details may depend on the programming language), this isn't something you want to do on purpose. If you really want code to sometimes execute, sometimes not, you can check some condition within the "finally" block - in this case, the finally block technically executes, but most of the code within it will not.
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What is finally block in java?
The Finally block in java is used along with the try-catch statements. The usual structure is try { ..... } catch(Exception e){ .... } finally { ..... } In the finally block we usually have code that is used to perform clean up activities corresponding to the code in the try block. When an exception occurs in the try block control comes to the catch block and the rest of the code in the try block would not execute. In such cases we may need to have some code that cleans up the objects that we created/used in the try block. No matter what happens, the code inside the finally block would definitely execute. The best use of finally block is when we are connecting to the database. In the try block we would have the statements that instantiate the connection, prepared statement, result set etc. If the query fails then all these objects would be left open and the code would continue. So in the finally block we usually nullify these statements so that even in case of an error the unused objects are cleared. Example: Connection con; PreparedStatment PS; ResultSet rs; try{ con = ConnectionManager.getConnection(); PS = con.prepareStatement(query); rs = PS.executyQuery(); ...... } catch (Exception e){ e.printStackTrace(); } finally { con.close(); PS.close(); } In case of an error the connection & prepared statement objects would remain open if we do not have the finally block. Tip: Whatever code we have inside the finally block would be run definitely if the try block is invoked. We can even use the finally block to check if the try block was reached and executed. If the try executes then we can rest assured that the finally would also get executed.
How do you stop execution of a program at a certain line?
Enable tracing
What is interrupt and why used interrupt?
interrupt means to stop the execution of some task and save it, start the new task which is caused by it. interrupt increases the efficiency of a computer and caused by multi-tasking. mehmood Ahmed (Superior university)
What is the purpose of Java sleep?
It pauses the execution of the program (or of the thread where it is invoked, if you have multiple threads), for the specified time.It pauses the execution of the program (or of the thread where it is invoked, if you have multiple threads), for the specified time.It pauses the execution of the program (or of the thread where it is invoked, if you have multiple threads), for the specified time.It pauses the execution of the program (or of the thread where it is invoked, if you have multiple threads), for the specified time.
If process stop its execution will thread also stop or it will continue to run?
Processes do not execute, it is the threads within a process that actually execute. All processes have at least one thread of execution, the main thread. If the main thread falls from scope, the process ends, taking all threads with it. This can lead to undefined behaviour if the threads are not terminated gracefully from within the main thread before it falls from scope.
