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How do I catch a specific exception?
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. The proper catch block is determined by matching the type of the exception to the name of the exception specified in the catch block.
How many exceptions a method can throw?
A method can throw one of several exceptions. Eg: public void dosomething() throws IOException, AWTException { // …. } This signals that the method can eventually throw one of those two exceptions (and also any of the unchecked exceptions).
Can a class throw an exception?
You can by throw exception at constructor level. You can see how FileInputStream force us to throw IO exception while creating object of it.
What to do if an exception is thrown in the main method?
The best you can do is to try to catch those excepitons and do some corrective action within the main. If the exception is catastrophic no matter whether you throw it or not, the program will exit. You don’t need to declare a method to throw if all the checked exceptions are handled by the code.
What’s the second choice to catch an exception?
Second choice is to catch the exception in the method, may or may not do something to handle the exception. Additionally tell the calling method that something has gone wrong, so you do the needful.
How to catch multiple exception types in Java SE 7?
The Java SE 7 compiler performs more precise analysis of rethrown exceptions than earlier releases of Java SE. This enables you to specify more specific exception types in the throws clause of a method declaration. Consider the following example: This examples’s try block could throw either FirstException or SecondException .
What does it mean to throw exception in Java?
Throwing exception is an one-way transfer of control to another line of code (like jump in assembly language). That means after the throwing statement the program should be executing necessarily another line of code outside that scope (at first calling code in stack which handle that exception).