Definition of a Java Container

Referring more generally to the Container pattern (of which an enterprise Java container could be considered a specialization), the book Server Component Patterns by M.Volter, et al. offers the following: [A CONTAINER provides] an execution environment that is responsible for adding the technical concerns to the COMPONENTS…Conceptually, it wraps the COMPONENTS, thus giving clients the … Read more

How to represent empty char in Java Character class

I want to represent an empty character in Java as “” in String… Like that char ch = an empty character; Actually I want to replace a character without leaving space. I think it might be sufficient to understand what this means: no character not even space.

List of Arrays in Java

Firstly, you can’t do new List(); it is an interface. To make a list of int Arrays, do something like this : P.S. As per the comment, package for List is java.util.List and for ArrayList java.util.ArrayList

Resize an Array while keeping current elements in Java?

You can’t resize an array in Java. You’d need to either: Create a new array of the desired size, and copy the contents from the original array to the new array, using java.lang.System.arraycopy(…); Use the java.util.ArrayList<T> class, which does this for you when you need to make the array bigger. It nicely encapsulates what you describe in your … Read more

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