Learning Java/Basic Java Language: Difference between revisions

If, when running, it reports "invalid class file", the compiler might not have created a file. It should have given an error message at compile time.

 

 

The first way to get user input is from the keyboard without using the swing gui. You must first import the Scanner package first like so. <code>import java.util.Scanner;</code> Once you have done that you will have to create a Scanner object. <code>Scanner scan1 = new Scanner(System.in);</code> Finally after the user has entered the input asked for you retrieve using your Scanner object. For example if we wanted a string as input we could use the following code.