That may happen when Java tries to parse a String, to convert it into a number. In this case, if the String doesn't contain a valid number - or perhaps if it contains additional symbols not appropriate for a number - you may get this error.
A very complicated thing...which nobody has answered yet.
Yes a user defined exception can have any number of methods in it. A user defined exception is nothing but a Java class created for a specific purpose. Just like ordinary Java classes, you can have any number of methods in it...
We can create a exception sub class by extending Exception class available in java
java exception
Easy: there is no exception-handling in C.
1. Arithmetic Exception 2. Input Output Exception 3. Number Format Exception
A very complicated thing...which nobody has answered yet.
Yes a user defined exception can have any number of methods in it. A user defined exception is nothing but a Java class created for a specific purpose. Just like ordinary Java classes, you can have any number of methods in it...
user defined exception is created by user such as arthmetic,number format exception ...
We can create a exception sub class by extending Exception class available in java
java exception
exception
Easy: there is no exception-handling in C.
The class/jar was compiled with a later major version of java than the version of java you are using to run the code with. So for instance the class was compiled with java 1.5 and you are running the class with java 1.4, which doesn't understand the format of 1.5 class files. check "java -version" from the command prompt.
we do it using the throw keyword.
Thorwable
Exception handling should be used in Java in all cases where you as a programmer suspect that your code might throw some exceptions or create errors that might look ugly when a user is using the application. In such cases you use exception handling to catch and handle the exception and exit gracefully. You use the try - catch block in Java for exception handling.