A one-dimensional array associates each element with one index. One-dimensional arrays are used to store lists of data items. There are three techniques for creating one-dimensional arrays in Java: ...

Right-click the Java file you want to edit and select "Open With." Click your Java compiler to open the code in the editor. Add the "Random" class library to the top of the source code file.

At the base of the Framework are the interfaces java.util.Collection and java.util.Map. The Collection interface represents just a group of objects, with no particular order or restriction.