Read a keyboard input in Java

In order to make the user interact with his keyboard, java has a special class called Scanner. To use this class you must:

• Import the java.util.Scanner package
• Make an instantiation  :

•  Guiding the user with a message that appears on the screen:

• Retrieve keyboard input in a Java variable:

• Final code :

Note

We do not always use nextLine () to retrieve a keyboard entry, the trick we use will be according to the nature of the input:

• nextInt ()          :   if the input is an integer
• nextDouble ()   :    if the input is a double variable
• nextLong ()      :    if the input is a variable of type long ...