After java.util package, java.lang package is another java package that is used most by the programmers. This package is by default imported in the java program, therefore it is not required to import it explicitly. Some of the most commonly used class in this package are: Object String StringBuilder StringBuffer Wrapper Classes Now discussing these …
Customized Exceptions Sometimes during creating a program, there is a requirement of some special exception which is not available. So in such situation Java gives us the facility to create our own exceptions called as customized exceptions. Consider the following example of a customized_exception, import java.util.Scanner; class TooYoungException extends RuntimeException { TooYoungException(String str) { super(str); } …
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Top Exceptions in Java On the basis of source which triggers the exception, we divide exceptions into 2 types as: 1) JVM Exceptions: Exceptions which arrise automatically by the JVM whenever a particular event occurs are called JVM exceptions. For example: a) ArrayIndexOutOfBoundsException: It is the child class of RuntimeException and hence it is uncheck. It …
Keyword throws in Java In the program, if there is any chance that the check exception will be thrown then we should handle this exception compulsory. If in case, check exceptions handling does not occur than the compiler will give compile time error saying “unreported exceptions xxx must be caught or declare to be thrown”. …
Final, Finally and Finalize in Java Final: Final is a modifier applicable for classes, methods and variables. If we declare any class as final then its child class creation is not possible. If we declare any method as final then it can not be overrided. Also if we declare any variable as final then it is …