Why can't we have diamond problem with interfaces ? What are the different uses of Interfaces in Java ? Like Discuss Correct / Improve java classes abstract class interfaces abstract class vs interface abstract classes vs interfaces Asked in 82 Companies basic frequent Please let us know the company, where you were asked this question : Abstract classes can have both abstract methods ( method declarations ) as well as concrete methods ( inherited to the derived classes ) whereas Interfaces can only have abstract methods ( method declarations ).Ī class can extend single abstract class whereas it can implement multiple interfaces. Differences between abstract class and interface ?Īns. Among first few questions in many interviews. Have been asked in HCL Technologies very frequently ( based on 3 feedback ). A checked exception is everything else under the Throwable class.Interview Questions and Answers for 'Cricbuzz' - 2 question(s) found - Order By Newest Example 2: Throwing Checked Exception Note: Every subclass of Error and RuntimeException is an unchecked exception in Java. If we throw a checked exception using throw keyword, it is must to handle the exception using catch block or the method must declare it using throws declaration. Note: If we throw unchecked exception from a method, it is must to handle the exception or declare in throws clause. Similarly, we can also throw unchecked and user defined exceptions. The above code throw an unchecked exception. Throw new ArithmeticException("Person is not eligible to vote") throw Arithmetic exception if not eligible to vote function to check if person is eligible to vote or not The syntax of the Java throw keyword is given below. Here, we just need to set the condition and throw exception using throw keyword. For example, we can throw ArithmeticException if we divide a number by another number. We can also define our own set of conditions and throw an exception explicitly using throw keyword. We will discuss custom exceptions later in this section. It is mainly used to throw a custom exception. We can throw either checked or unchecked exceptions in Java by throw keyword. These exceptions may be related to user inputs, server, etc. The Exception has some message with it that provides the error description. We specify the exception object which is to be thrown. The Java throw keyword is used to throw an exception explicitly. In Java, exceptions allows us to write good quality codes where the errors are checked at the compile time instead of runtime and we can create custom exceptions making the code recovery and debugging easier.
0 kommentar(er)
