Is there anything like .net's NotImplementedException in java?
Are there any guidelines on exception propagation in Java?
When do you add an exception to the method signature?
For example: if an exception is only thrown when an essential program resource is missing, and can only be handled at the top level, do I propagate it through all methods using this exception through all the methods using the erring method?
Are there any good practices? Any bad pra...
I'm converting some C# code to Java and I need to include an exception that is similar to C#'s InvalidOperationException. Does such a thing exist? Also is there a list of equivalent exception types in the two languages? Thanks.
I think in my particular case IllegalStateException is most appropriate. Thanks for all the responses.
what is the standard exception to throw in Java for not supported/implemented operations
Using Collections.unmodifiableMap(...), I'm trying to return an unmodifiable view of a map. Let's say I have the following method,
public final Map<Foo, Bar> getMap(){
...
return Collections.unmodifiableMap(map);
}
Why is it legal elsewhere to do the following,
Map<Foo, Bar> map = getMap();
map.put(...);
This doesn't throw an UnsupportedOperationException like I though...
I have an Interface and two Classes wich are implementing the Interface.
public interface MyInterface {
public void firstMethod();
public int secondMethod();
}
public class MyClass1 implements MyInterface {
public void firstMethod() {}
}
public class MyClass2 implements MyInterface {
public void firstMethod() {}
public int secondMethod() {}
}
The class MyClass1 is t...
I try to add objects in a List<String> instance but I have an error message when I submit my form! Anyone can help me?
Here is my Servlet code for LDAP group creation:
public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException, NullPointerException{`
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8...
I have tried below code
String s[]={"1","2","3","4"};
Collection c=Arrays.asList(s);
System.out.println(c.remove("1") +" remove flag");
System.out.println(" collcetion "+c);
I was getting
Exception in thread "main" java.lang.UnsupportedOperationException
at java.util.AbstractList.remove(Unknown Source)
at java.util.AbstractList$Itr.remove(Unknown Source)
at java.util.Abstrac...
I noticed the following in the Java Language spec in the section on enumerations here: link
switch(this) {
case PLUS: return x + y;
case MINUS: return x - y;
case TIMES: return x * y;
case DIVIDE: return x / y;
}
throw new AssertionError("Unknown op: " + this);
However, looking at the switch statement definition section, I didn't notice this particular syntax (the associated thro...
