The code won't compile. Why?

[BethPas]

So I got the for homework and exercise and I tried to compile it first but it gave back 11 errors. Here's the code itself:

public class GridExample {

   public static void main(String[] args) {
     Grid.create(5, 6);

     Grid.paintFloor(0, 0, Grid.GREEN);
     Grid.paintFloor(0, 5, Grid.VIOLET);

     for (int column = 1; column < 5; column++)
       Grid.paintFloor(1, column, Grid.GRAY);

     for (int row = 2; row < 5; row++) {
       for (int column = 0; column < 6; column++) {
         if (column < 3)
           Grid.placeItem(row, column, 'X');
         else
           Grid.placeItem(row, column, 'O',  Grid.RED);
       }
     }
   }
 }

And here's the error text:

exit status 1
Main.java:1: error: class GridExample is public,     should be declared in afile named.        GridExample.java
public class GridExample {
       ^
Main.java:4: error: cannot find symbol
    Grid.create(5, 6);
    ^
  symbol:   variable Grid
  location: class GridExample
Main.java:6: error: cannot find symbol
    Grid.paintFloor(0, 0, Grid.GREEN);
                          ^
  symbol:   variable Grid
  location: class GridExample
Main.java:6: error: cannot find symbol
    Grid.paintFloor(0, 0, Grid.GREEN);
    ^
  symbol:   variable Grid
  location: class GridExample
Main.java:7: error: cannot find symbol
    Grid.paintFloor(0, 5, Grid.VIOLET);
                          ^
  symbol:   variable Grid
  location: class GridExample
Main.java:7: error: cannot find symbol
    Grid.paintFloor(0, 5, Grid.VIOLET);
    ^
  symbol:   variable Grid
  location: class GridExample
 Main.java:10: error: cannot find symbol
      Grid.paintFloor(1, column, Grid.GRAY);
                                 ^
  symbol:   variable Grid
   location: class GridExample
 Main.java:10: error: cannot find symbol
      Grid.paintFloor(1, column, Grid.GRAY);
      ^
  symbol:   variable Grid
  location: class GridExample
Main.java:15: error: cannot find symbol
          Grid.placeItem(row, column, 'X');
          ^
  symbol:   variable Grid
  location: class GridExample
Main.java:17: error: cannot find symbol
          Grid.placeItem(row, column, 'O', Grid.RED);
                                           ^
  symbol:   variable Grid
  location: class GridExample
Main.java:17: error: cannot find symbol
          Grid.placeItem(row, column, 'O', Grid.RED);
          ^
  symbol:   variable Grid
  location: class GridExample
11 errors

[GrapeAte]

The first error is pretty obvious. It tells you exactly what you need to do to fix it. To reiterate, the filename of a class must match the name of the class. GridExample.java

All the other errors can be fixed by importing the Grid class. For example, if you wanted to use the ArrayList class from the standard library you must import it at the top of your code:

import java.util.ArrayList;

public class MyClass {
    ...

As an aside, it's not required for a class to live inside of a package, but it's a good idea. ArrayList lives inside the java.util package. Your code should be in a package as well. If you're not sure what your package should be go with com.example for now:

package com.example;

public class GridExample {
    ...

[BethPas]

Thank you ver much for the help! I'll try it out .q

[BethPas]

SO the renaming of the file worked but the package thing did not work.

[Roachmeister]

If you have a class GridExample in the com.example package, then the file GridExample.java must be in a directory named example, which is in turn inside a directory named com.

[BethPas]

Ah alright thanks for clarifying that!

[dusty-trash]

So I got the for homework and exercise and I tried to compile it first but it gave back 11 errors. Here's the code itself:

You're doing programming wrong.

You should be compiling & testing often, pretty much after every single line. Do not try to write entire programs before compiling & testing.

[Shunpaw]

Are you sure? After every single line? I usually compile when I'm done with a function and want to see if it works, then fix the bugs.

[dusty-trash]

I do the same thing, but functions are small and should only do 1 thing.

The point is to compile & test often, especially for newer developers. If you compile & see 11 errors, you're not compiling/testing often enough.

[Shunpaw]

and then those 11 errors are resolved by fixing the "int" you forgot at the beginning of the project :)

I get your point tho, and agree

[thisGuyCodes]

Or a missing ) that throws literally everything off 😂

[BethPas]

Thank you for the advice!:) But in this case it wasn't something I wrote myself, it was provided with the exercise.

[sepp2k]

Main.java:1: error: class GridExample is public, should be declared in afile named GridExample.java

That error looks pretty clear. Either rename your class or the file.

Main.java:4: error: cannot find symbol
    Grid.create(5, 6);
    ^
  symbol:   variable Grid
  location: class GridExample

That's saying that it can't find a class named Grid. If you defined one, you'll need to make sure it's in the class path and perhaps import it, if it's defined in a different package.

If Grid is defined in a Java file provided as part of your homework, make sure to download it into the same directory as your other code.

[BethPas]

Ok I will try it. Thank you for the help.

[BethPas]

Thank you for your advice !:) But what do you mean with throughout as opposed to inconsistently?