NullPointerException是什么原因？

Question

我正在尝试解决父亲提出的问题，但是由于某种原因而得到了NullPointerException 它是一个程序，用于创建Priority排序器，在其中输入名称和优先级，并自动为您排序所有内容。

我尝试将get / set方法与公共变量交换，但它不起作用！

public class PrioritySorter
{
Scanner s;
private String[] names;
private int[] priorities;
private Connecter[] connecters;

public PrioritySorter()
{
    s = new Scanner(System.in);
    names = new String[10];
    priorities = new int[10];
    connecters = new Connecter[10];

    System.out.println("Enter 10 names");
    for (int i = 0; i < 10; i++)
    {
        names[i] = s.nextLine();
        connecters[i].setName(names[i]);
    }

    System.out.println("Enter priorities");
    for (int i = 0; i < 10; i++)
    {
        System.out.print("Priority of " + names[i] + ": ");
        priorities[i] = s.nextInt();
        connecters[i].setConnectedPriority(priorities[i]);
    }

    sort();
    print();
}

public void sort()
{
    Arrays.sort(priorities);
    for (int i = 0; i < 10; i++)
    {
        for (int j = 0; j < 10; j++)
        {
            if(priorities[i] == 
                            connecters[j].getConnectedPriority())
            {
                if(names[i] == 
                                    connecters[j].getName())
                {
                    String temp = names[j];
                    names[j] = names[i];
                    names[i] = temp;
                }
            }
        }   
    }
}

public void print()
{
    for (int i = 0; i < 10; i++)
    {
        System.out.println("Name: " + names[i] + "   Priority: 
                    " + priorities[i]);
    }
}

public static void main(String[] args)
{
    new PrioritySorter();
}
}

public class Connecter
{
private String name = "Nujsf";
private int connectedPriority = 10000;



public String getName()
{
    return name;
}
public void setName(String name)
{
    this.name = name;
}
public int getConnectedPriority()
{
    return connectedPriority;
}
public void setConnectedPriority(int connectedPriority)
{
    this.connectedPriority = connectedPriority;
}
}