"Cannot find symbol" error in Java

Question

I've been programming for a few days, I'm using Deitel's How to program.

In this case the app class GradeBookTest is meant to create and use an object of the class GradeBook, but everytime I try to run GradeBookTest I get the cannot find symbol error. I know it's probably something stupid but I've been looking for the solution without success.

GradeBook.java:

public class GradeBook
{
    public void displayMessage();
    {
        System.out.println("Welcome to the Grade book!")
    }
}

GradeBookTest.java:

public class GradeBookTest 
{
    public static void main(String[] args) 
    {
        GradeBook myGradeBook = new GradeBook();

        myGradeBook.displayMessage();
    }
}

Answer 1

I have made some minor changes that will work for you

class GradeBook {
    public void displayMessage() { // removed semi colon from your code
        System.out.println("Welcome to the Grade book!"); // added semi colon to your code
    }
}

public class GradeBookTest {

    public static void main(String[] args) {

        GradeBook myGradeBook = new GradeBook();

        myGradeBook.displayMessage();
    }
}

Output

Welcome to the Grade book!