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Can you have try block throw different exception types?
The Try Block It encloses the part of your code that might throw the exception. If your code throws more than one exception, you can choose if you want to: use a separate try block for each statement that could throw an exception or. use one try block for multiple statements that might throw multiple exceptions.
Can we handle exception without catch block?
1 Answer. Yes, it is possible. You can use an uncaught exception handler. Its responsibility is to catch the exceptions that your program didn’t catch, and do something with it.
Is catch block necessary with try block?
It is not necessary that each try block must be followed by a catch block. It should be followed by either a catch block or a finally block. And whatever exceptions are likely to be thrown should be declared in the throws clause of the method.
When to use specific exceptions in a catch block?
When an exception occurs, it is passed up the stack and each catch block is given the opportunity to handle it. The order of catch statements is important. Put catch blocks targeted to specific exceptions before a general exception catch block or the compiler might issue an error.
When to run code only if no exception is thrown?
Or if you want your second block of code to be outside the try block: You could also put the if statement in a finally block, but there is not enough information in your question to tell if that would be preferable or not. In this example, doSomething2 () will only be executed if no exception is thrown by doSomething ().
What happens if there is no exception thrown in Java?
Also note, doSomething3 () will be executed if there is an exception thrown by doSomething2 (); If no exception is thrown, doSomething3 (); will not be executed. Just put the code in the try block. If an exception is thrown, it will skip to the catch block. If no exception is thrown, the code will just run.
How to catch an invalidcastexception in a catch block?
The following code example uses a try / catch block to catch an InvalidCastException. The sample creates a class called Employee with a single property, employee level ( Emlevel ). A method, PromoteEmployee, takes an object and increments the employee level.