Elevator.java

import java.util.Scanner;
import java.io.*;
  
   public class Elevator
   {
       
      public static void main (String[] args) throws IOException
      {
        Scanner scan = new Scanner(new File("elevatordata.txt"));
        int s = scan.nextInt();
         
        int i = 0;
        int count = 0;
        int countA;
        int countB;
        int countC;
         
        PersonList persons = new PersonList(12);               
         
        while(scan.hasNext()){
           persons.getPersons(0); 
           persons.getPersons(1);          
           persons.getPersons(2); 
           persons.getPersons(3); 
           persons.getPersons(4);       
           persons.getPersons(5); 
           persons.getPersons(6);           
           persons.getPersons(7); 
           persons.getPersons(8);           
           persons.getPersons(9); 
           persons.getPersons(10);        
           persons.getPersons(11); 
            
       person.setName(scan.next());
       person.setWeight(scan.nextInt());
       i++;
    
            
        int total;
        if(total > 1100)
           System.out.println("You have exceeded the weight limit!");
          
        countA = persons.howMany;
        System.out.println("In the elevator" + countA + "people got on.");
         
        System.out.println("The array by weight is");
        countB = persons.sortWeights;
        System.out.println("After the people were sorted by weight" + countB + "people got on.");
         
        System.out.println("The array by name is");
        countC = persons.sortNames;
        System.out.println("After the people were sorted by name" + countC + "people got on.");
         
        if(countA > countB && countA > countC)
        {
           System.out.println("The first method worked the best");
        }
        else if(countB > countA && countB > countC)
        {
           System.out.println("The second method worked the best");
        }
        else
        {
           System.out.println("The last method worked the best");
        }
}        
}
}

elevatordata.txt

Bob	150
Ralph	305
Tim	225
Barbara	135
Jane	160
Steve	80
Tom	200
Mike	165
Shirley	90
Pam	100
Frank	120

Person

import java.util.Scanner;
 
public class Person
{
   private String name;
   private int weight;
    
   Scanner scan = new Scanner(System.in);
 
    
   public Person(String n, int w)
   {
     name = n;
     weight = w;
   }
 
   public Person()
   {
      name = "no name";
      weight = 0;  
   } 
 
   public String toString()
   {
      return name + "\t" + weight;
   }
 
   public String getName()
   {
      return name;
   }
     
   public int getWeight()
   {
      return weight;
   }
    
   public void setName(String n)
   {n = name;}
    
   public void setWeight(int w)
   {w = weight;}  
    
 
}

PersonList.java

public class PersonList
{
    private Person[] persons;
    private int count = 0;
      
    public PersonList(int index)
    {
        persons = new Person[index];
        persons[0] = new Person ("Anne", 30);
        persons[1] = new Person ("Bob", 150);
        persons[2] = new Person ("Ralph", 305);
        persons[3] = new Person ("Tim", 225);
        persons[4] = new Person ("Barbara", 135);
        persons[5] = new Person ("Jane", 160);
        persons[6] = new Person ("Steve", 80);
        persons[7] = new Person ("Tom", 200);
        persons[8] = new Person ("Mike", 165);
        persons[9] = new Person ("Shirley", 90);
        persons[10] = new Person ("Pam", 100);
        persons[11] = new Person ("Frank", 120);
 
        count = 0;
    }
    
    public getPersons(int index)
    {
          return persons.getpersons(0);
    } 
    
    public void add(Person x)
    {
        persons[count] = x;
        count++;            
    }
    public int howMany()
    {
        int total = 0, i = 0;
        do
        {
            total += persons[i].getWeight();
            System.out.println("\n" + (i+1) + ":" + persons[i]);        
            i++;
              
          
        }while (total <= 1100);
            System.out.println("The total weight is " + (total- (persons[i-1].getWeight())) );
            return i-1;         
    }
    public int sortWeights()
    {
        int weightIndex;
        for (int i=0; i < count; i++)
       {
            weightIndex = i;
            for (int j = i+1; j < persons.length; j++)
                if (persons[j].getWeight() < persons[weightIndex].getWeight())
                    weightIndex = j;
  
            Person temp = persons[i];
            persons[i] = persons[weightIndex];
            persons[weightIndex] = temp;
              
        }
        return howMany();
    }
    public int sortNames()
    {
        int nameIndex;
        for (int i=0; i < count; i++)
       {
            nameIndex = i;
            for (int j = i+1; j < persons.length; j++)
            if(persons[i].getName().compareTo(persons[nameIndex].getName())>0)
                   nameIndex = j;
          
        Person temp = persons[i];
        persons[i] = persons[nameIndex];
        persons[nameIndex] = temp;
        }
        return howMany();
    }
      
    public String toString()
    {
        String out ="";
        for (int i=0; i<count; i++)
        out += ("\n"+(i+1) + ":\t" + persons[i]+"\n");
        return out;
    }
}