Java Foundations

An array is . . .

A collection of variables of the same type.

What is the difference between HashMap and HashTable?

HashMap is an advanced version of HashTable, so it's faster. And, they both inherit different classes. HashMap is non-sychronized while HashTable is synchronized.

What is the Java Development Kit (JDK) in Java?

Java Development Kit(JDK) is the java development kit that is used to build the applications that will run on the JRE (Java Run Time Environment)

Map keys will contain what?

Map keys will contain unique keys.

What is the Java Runtime Environment (JRE)?

The Java Runtime Environment (JRE) is a software layer that runs on top of the computer's operating system software and provides the class libraries and other resources that a specific Java program needs to run.

The map contains values on what basis?

The map contains values on the basis of key and value pairs.