javac not working for me

followed along and did everything like in the video buy i get a error and i did save my work and even restarted workspace

import java.io.Console;

public class Introductions {

public static void main(String[] args) {
    Console console = System.console();
    // Welcome to the Introductions program!  Your code goes below here
  console.printf("hello my name is Scott");

} }

javac: file not found: introductions.java
Usage: javac <options> <source files>
use -help for a list of possible options
treehouse:~/workspace$ ^C
treehouse:~/workspace$ javac introductions.java
javac: file not found: introductions.java
Usage: javac <options> <source files>
use -help for a list of possible options
treehouse:~/workspace$ ls
Introductions.java
treehouse:~/workspace$ java introductions
Error: Could not find or load main class introductio ns
treehouse:~/workspace$ 0^C
treehouse:~/workspace$ ^C