Correzione degli errori 🐛

This is my code, why it doesn't like it? I can't leave uncommented the last sentence because the task is: program shouldn't print.

package it.codegym.java.core.level01.task12;

public class Solution
{
    public static void main(String[] args)
    {
        int number = 10;
        //int number = 20;

        int uninitialized;
        //System.out.println(uninitialized);

        //String text = 123;

        //System.out.println(undeclaredVariable);

        //System.out.println(number);

    }
}