Confused Coder

Hi There! :-) Its been a while since I am working on GWT(Google Web Toolkit) and its wrapper framework like ext-GWT (which is called as GXT) and have come across lots of new widgets and containers. One recent feature request, I had to work on recently, which caught my attention was Mutli-Select ComboBox. What does it mean ? Its a ComboBox (a widget which will allow user to edit - as well as select values from multiple options it provides) How its different from normal ComboBox? Multi-ComboBox allows you to select multiple values from options (unlike normal combo which allows to select only one value at a time) Now as I went on to analyse the implementation of this widget, I remembered a component from GXT called CheckBoxListView . Which is a list view comprising of CheckBox components. As I found this component perfect to select multiple values, I went on to integrate it with TriggerField . I thought of creating a Dialog widget which will act as ComboBox "option prov

Hello There!, Recently I came across a very interesting problem, and the problem statement is as follows There are 2 classes called A and B, with the methods - methodA() and methodB(). The class definition vaguely looks like this. class A {   public methodA() {       statementA;   } } class B {     public methodB() {          statementB;    } } Now the 2 classes's methods contain a set of statements represented by statementA and statementB . Our goal here is to make these 2 statements in 2 different class, execute in a mutually exclusive manner. That means, when any thread executes statementA, none of the threads must be allowed to execute statementB. And when any thread executes statementB, none of the threads must be allowed to execcute statementA. Meanwhile, unlimited threads can simultaneously access statementA alone or statementB alone. methodA and methodB can be changed in any form (making them synchronized or whatever). But method signatures are not