What is the best practice to follow when you need to throw an exception which was not defined in an interface that you are implementing?
Here is an example:
public interface Reader
{
...
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I wanted to ask that how to mention this in my interface
public class find(int x) throws A_Exception, B_Exception{
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}
i want to say that i can mention One exception in an interface ... |
Here's some code from an FTP application I'm working on. The first method comes from an interface which is being triggered by a class which is monitoring server output.
@Override
public void responseReceived(FTPServerResponse ...
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I am trying to add a custom throws clause to a method definied by an interface. This is not possible. How could I bypass it? Here is some code:
private void sendRequestToService(final ...
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I mean, in the definition. If I have a method of a class that implements an interface and I want to throw an exception, how can I do that if the ... |
I'm currently implementing a rather large interface and some of its methods are not applicable to the implementation.
Should I do something akin to:
/**
* @throws UnsupportedOperationException always. This method is not ...
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What I want is a standard JDK class that look like this:
interface ExplodingRunnable {
void run() throws Exception;
}
Callable is no good, because its call() ... |
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When implementing a method, or overriding it, your exception clause can leave off any of the exceptions in the Interface or base class version of the method, but your new method may not add any exceptions. Consider this declaration: public method(MyIF f) throws MySpecialException { f.methodY(); } public void doIt(String args[]) { MyIF foo = new MyFirstImpl(); MyIF bar = new ... |
I am getting an EOF exception when running code for implementing Externalizable interface ... I am not able to understand why ??? Please help me ... I am pasting the code for reference ..... package com.example.programs; import java.io.Externalizable; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.ObjectInput; import java.io.ObjectInputStream; import java.io.ObjectOutput; import java.io.ObjectOutputStream; class EmployeeData implements Externalizable{ private String fname; ... |
Hi! I am rather new at Java, and have been reading tutorials here and there and making small programs. I am currently working on exception handling. In one particular tutorial, I came across the next lines: "The general form of Java's catch statement is catch (SomeThrowableObject variableName) { Java statements } The argument type, SomeThrowableObject, declares the type of exception that ... |
below is my complete code for a bank account class and the measurable interface and my InsufficientFundsException class. My bankAccount class doesnt' recognize the interface or the exception class I designed. I keep getting the error below. The interface and the InsufficientFundsException class compiles with no problem. C:\Documents and Settings\felipewalker\Desktop\BankAccount\BankAccount.java:5: cannot resolve symbol symbol : class Measurable location: class BankAccount public ... |
Can you please provide me an explaination for the following:- 1. If a method in an interface is declared to throw an Exception then the implementation of that method in a class which implements the interface need not throw that exception. Why is it designed so, I am missing the rationale behind this behaviour. Lets say I want the client to ... |
Hi all, I am maintaining some code that has stretched my understanding of exceptions and interfaces. After tinkering around with some code (at bottom) the rules seem to be * a method implementing an interface may or may not throw the interface methods declared exceptions * a method implementing an interface must not throw any exceptions not also thrown by the ... |
Because an implementation is a refinement of the interface specification; whenever the specification is feasible, the refinement must be feasible. If you throw an Exception, the refinement is no longer feasible, so you are breaching the laws of refinement (and probably the Liskov Substitution Principle, too). The compiler doesn't check RuntimeExceptions. It doesn't mean you can use RuntimeExceptions, it means the ... |
The code compiled without any errors because there weren't any errors. (This should be obvious.) You thought the signature of the overriding method had to match the signature of the method being overridden? Well, that's correct, it does have to match. And it does match; it doesn't declare that it throws any exceptions which the original method didn't declare. (It doesn't ... |
I have made a class A that implements an interface I. One of the implemented methods throws an exception. Eclipse wants to add a 'throws' statement to the interface I. But is that correct? What if another implementation of I does not throw an exception? How are exceptions dealt with when implementing interfaces? |
Hi, So, I'm using an inner class - an implementation of an interface (org.dom4j.ElementHandler) like this (its for parsing elements in an XML document). File fileToParse = new File(fileName); SAXReader reader = new SAXReader(); reader.addHandler( "/AccountResponse/GetReportResponse/keyword", new ElementHandler() { public void onStart(ElementPath path) { // do nothing here... } public void onEnd(ElementPath path){ // Parse the element and prune it ... |