What's the wrong

Question

// Fig. 3.5: GradeBookTest.java

// Create GradeBook object and pass a String to 

// its displayMessage method.

import java.util.Scanner; // program uses Scanner

public class GradeBookTest

{

   // main method begins program execution

   public static void main( String args[] )

   { 

      // create Scanner to obtain input from command window

      Scanner input = new Scanner( System.in );

      // create a GradeBook object and assign it to myGradeBook

      GradeBook myGradeBook = new GradeBook(); 

      // prompt for and input course name

      System.out.println( "Please enter the course name:" );

      String courseName = input.nextLine(); // read a line of text

      System.out.println(); // outputs a blank line

      // call myGradeBook's displayMessage method 

      // and pass courseName as an argument

      myGradeBook.displayMessage( courseName );

   } // end main

} // end class GradeBookTest

Answer 1

Provide ur complete code. displayMessage(String msg) method implementation not shared

Answer 2

Ideally you should share your code in the code playground and post a link here. It makes it easier for people to read your code and it allows them to play around with it to see what's going on.

Answer 3

https://code.sololearn.com/cJDb6xokZ22i/?ref=app

Answer 4

How?

Answer 5

See here I made the cod but it does not work

Answer 6

https://code.sololearn.com/cJDb6xokZ22i/?ref=app
this is the cod

Answer 7

write second class GradeBook with method displayMessage( .. )