I've got a Java question:I'm supposed to implement a selection sort, and supposed to use to code a method:public static void sort (ArrayList objects)I have ...

However, the Java Platform provides a data structure that greatly simplifies the use of reference objects like this, called the java.util.WeakHashMap class.

Class – Everything in Java is associated with classes and objects. Being a user-defined blueprint, a class in simple terms represents the data structure which is used again and again.