java - 如何在 Java 中对整数进行排序而不使其成为数组或列表？

Question

假设我有一个 Employee 对象数组。

单个员工对象具有以下参数:姓名、年龄和部门。

我需要按年龄对 Employee 对象进行排序。

除了一部分之外，我知道如何执行此操作。

当我使用compareTo方法时，我需要指定如何对整数进行排序。

如何将它们设为整数数组或列表？

编辑

这是我的代码，以进一步阐明我需要做什么。

public class Company {
    public static void main(String [] args){
        Employee[] e = new Employee[13];
        PrimeAgeChecker p = new PrimeAgeChecker();
        Department d = new Department();
        e[0] = new Employee("Counting Guru",55,"Accounting");
        e[1] = new Employee("Counting Pro",45,"Accounting");
        e[2] = new Employee("Counting Savvy",40,"Accounting");
        e[3] = new Employee("Counting Novice",25,"Accounting");
        e[4] = new Employee("Sales Guru",50,"Marketing");
        e[5] = new Employee("Sales Pro",48,"Marketing");
        e[6] = new Employee("Sales Savvy",38,"Marketing");
        e[7] = new Employee("Hiring Guru",58,"Human Resrouces");
        e[8] = new Employee("Hiring Pro",47,"Human Resrouces");
        e[9] = new Employee("Hacking Pro",47,"Information Systems");
        e[10] = new Employee("Hacking Guru",51,"Information Systems");
        e[11] = new Employee("Hacking Savvy",38,"Information Systems");
        e[12] = new Employee("Hacking Novice",23,"Information Systems");


        for(int i = 0;i<e.length;i++){
            System.out.println(e[i] + " " + p.isPrime(e[i]));
        }//end 
    }//end main
}//end company

如您所见，每个 Employee 对象都有 3 个参数。

我需要按年龄整数对它们进行排序。

Answer 1

您应该看看 sort Arrays的方法类

public static <T> void sort(T[] a, Comparator<? super T> c)

您需要创建一个 Comparator 告诉它如何命令你的员工

http://docs.oracle.com/javase/7/docs/api/java/util/Arrays.html

同样，如果您有 List或其他类型的Collection您可以使用 sort方法 Collections