I have a custom exception like this
public class MyOwnException extends Exception {
}
Then in my class
I have two methods
public void ExceptionTest() throws Exception {
throw new FileNotFoundException();
}
public void ApplicationExceptionTest() throws MyOwnException ...
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just look at program below..
import java.io.*;
import java.rmi.*;
class class1
{
public void m1() throws RemoteException
{
System.out.println("m1 in class1");
}
}
class class2 extends class1
{
public void m1() throws IOException
{
System.out.println("m1 in class2");
}
}
class ...
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just look at program below..
import java.io.*;
import java.rmi.*;
class class1
{
public void m1() throws RemoteException
{
System.out.println("m1 in class1"); } }
class class2 extends class1
{
public void m1() throws ...
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class B {
void process()throws Exception{
System.out.println("hi sh");
}
}
class C extends B {
void process(){
...
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Give this method here:
public SomeClass(Throwable stackTrace) {
super();
this.stackTrace = stackTrace;
}
How can I find out what class type stacktrace originally was before being passed in?
... |
I find Java's exception hierarchy confusing. Throwable is divided into Error and Exception, and RuntimeException inherits from Exception.
Error is an unchecked exception. Why doesn't Error inherit from RuntimeException then?Exception is a ... |
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As Joanne has told you. A method can only declare a (checked) Exception if it is the same Exception its superclass method declares (or a subclass thereof). You must be able to call the subclass method under the same conditions that you call the superclass method (as Barbara Liskov showed), so adding an Exception will violate those conditions. T1#t declares two ... |
Hello I have 4 classes 1 - Main 2 - Parent 3 - Child 4 - Helper The order of execution is this main >>> Helper.do() >>>Parent.requested() >>> child.overrideMethod() The Parent class looks like this public String overrideMethod() throws Exception { //This method is overridden by the child class return "hello"; } public void requested(){ try{ overrideMethod(); }catch(Exception e){ file.delete(); } ... |
Hi, I had been to one interview, there they gave me a code: class A() throws IOException SQL Exception { } class B extends A () throws IOException {} is it a valid code? how to manage exceptions when a class is inherited? According to my knowledge, IO Exception is handled in class A so, there is no need to handle ... |
The child constructor always calls one of the parent constructors*; if you leave out the call to "super(...)" one will be added implicitly without any arguments. This whole process of a child class constructor calling its super class constructor is called constructor chaining, and it will only end when Object's non-argument constructor is called. In this case, the parent constructor can ... |
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You should never be throwing Errors! Leave those to the virtual machine. If you want to get the effect of throwing an object that isn't an Exception, I'd wrap it in a custom Exception class. Something like: class ExistingClass extends SomeOtherClassThatIsNotAnException{} //... public class ExistingClassWrappedException extends Exception { private ExistingClass wrappedObject; public ExistingClassWrappedException(ExistingClass wrappedObject) { this.wrappedObject = wrappedObject; } public ExistingClass ... |
I am having trouble with this assignment. Any help is much appreciated. Description For this assignment you will create a program that simulates a pizza ordering system that allows a user to choose a small, medium, large, or xlarge pizza and load it with up to 12 toppings, then display a detailed summary of the order with the total cost amount ... |
danbrown wrote: bandarurm, I am a little confused here about how the polymorphism is working. If we store the object of subclass in a reference of parent class isn't the subclass's method called? So why does my previous code behave differently and compiler checks for Exception even though the sub class method does not throw any exception. Please see the code ... |