New to Java

Hi. I'm new to coding in Java with a limited background in C++. Anyway, I just got my first Java program up and running and I'm looking for feedback regarding the structure of my program. I'm going from examples in my book and I need to learn Java before I transfer schools next term. Any feedback is much appreciated . Disclaimer My classes are taken from the book "Data Structures & Algorithms in Java". Thanks for your time.

//=================================
// Client Test Program
//=================================

package highscores;

import java.util.Scanner;

public class Main 
{
    
     public Main() 
     {
     }
    
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) 
    {
        Scores highscores = new Scores();
        
        Scanner s = new Scanner(System.in);
        
        int mainloop = 0;
       
        while(mainloop == 0)
        {
            System.out.println("===HIGH SCORES===");
            System.out.println("Press '1' to add an entry");
            System.out.println("Press '2' to delete an entry");
            System.out.println("Press '3' to display the high scores");
            System.out.println("Press '4' to exit");
        
            int choice = s.nextInt();
            
            switch(choice)
            {
                case 1: 
                    highscores.addInput();
                    break;
                case 2: 
                    highscores.removeInput();
                    break;
                case 3: 
                    highscores.displayScores();
                    break;
                case 4:
                    ++mainloop;
                    break;
                default:
                    System.out.println("Error: not a valid menu option");
                    break;
            }
        }
        
    }
    
}

package highscores;

public class GameEntry
{
    protected String name;
    protected int score;
    
    //costructor
    public GameEntry(String n, int s)
    {
        name = n;
        score = s;
    }
    
    //retrieves the name
    public String getName()
    {
        return name;
    }
    
    //retrieves the score
    public int getScore()
    {
        return score;
    }
    
    //returns a string representation
    public String toString()
    {
        return "(" + name + ", " + score + ")";
    }
}

package highscores;

import java.util.Scanner;

public class Scores
{
    public static final int maxEntries = 10;
    protected int numEntries;
    protected GameEntry[] entries;
    
    //constructor
    public Scores() 
    {
        entries = new GameEntry[maxEntries];
        numEntries = 0;
    }
    
    //accepts input from user for a new high score
    public void addInput()
    {
        Scanner s = new Scanner(System.in);
        
        System.out.println("Enter your name: ");
        String name = s.next();
        
        System.out.println("Enter your high score: ");
        int score = s.nextInt();
        
        GameEntry newscore = new GameEntry(name, score);
        
        add(newscore);
    }
    
    //adds a new score to the high score list
    public void add(GameEntry e)
    {
        int newScore = e.getScore();
        
        if(numEntries == maxEntries)
        {
            if(newScore <= entries[numEntries-1].getScore())
                return;
        }
        else
        {
            numEntries++;
            
            int i = numEntries-1;
            
            for(; (i>=1) && (newScore > entries[i-1].getScore()); i--)
                entries[i] = entries[i-1];
                
            entries[i] = e;
        }
    }
    
    //accepts input from user to remove a high score
    public void removeInput()
    {
        Scanner s = new Scanner(System.in);
        
        System.out.println("Enter the index of the score to remove: ");
        int index = s.nextInt();
        
        remove(index);
        
    }
    
    //removes and returns a high score at the specified index
    public GameEntry remove(int i) throws IndexOutOfBoundsException
    {
        if((i<0) || (i >= numEntries))
            throw new IndexOutOfBoundsException("Invalid index: " + i);
        
        GameEntry temp = entries;



for(int j = i; j < numEntries - 1; j++)

entries[j] = entries[j+1];



entries[numEntries - 1] = null;



numEntries--;



return temp;

}



//displays high score list

public void displayScores()

{

String s = "[";

for(int i = 0; i < numEntries; i++)

{

if(i > 0)

{

s += ",";

}



s += entries[i];

}

System.out.println(s + "]");

}



}