java中实现投票选择班长的案例

package test;
import java.util.Arrays;
import java.util.Scanner;
public class Test {
	public static void main(String[] args) {
		Person p1=new Person("张三", "1");
		Person p2=new Person("李四", "2");
		Person p3=new Person("王五", "3");
		Person p4=new Person("老六", "4");
		Object num[]={p1,p2,p3,p4};//将对象放入数组中
		for(int i=0;i<num.length;i++){
			Person person=((Person)num[i]);
			System.out.println("姓名："+person.getName()+"，编号："+person.getNoID());
		}
		Scanner input=new Scanner(System.in);
		int choice;
		System.out.println("请输入投票的选人代号（输入0结束）");
		while(true){
			choice=input.nextInt();
			System.out.println("请技术投票");
			if(choice==0){
				break;
			}else{
				int number=((Person)num[choice-1]).getNumber();
				((Person)num[choice-1]).setNumber(number+1);
			}
		}
		Arrays.sort(num);//对数组进行排序，按从小到大
		for(int i=0;i<num.length;i++){
			Person person=((Person)num[i]);
			System.out.println("姓名："+person.getName()+"，编号："+person.getNoID()+",票数："+person.getNumber());
		}
		System.out.println("投票结束后");
		Person p=((Person)num[num.length-1]);//获取最大的人
		System.out.println("投票的最终结果是："+p.getName()+"同学，最后以"+p.getNumber()+"票单选班长");
	}
}
class Person implements Comparable<Person>{
	private String name;
	private String noID;
	private int number;
	public Person(){
		this.number=0;
	}
	public Person(String name,String onID){
		this.name=name;
		this.noID=onID;
		this.number=0;
	}
	public Person(String name,String onID,int number){
		this.name=name;
		this.noID=onID;
		this.number=number;
	}
	@Override
	public int compareTo(Person p) {//java内置的排序对象，可以进行从小到大的排序
		return this.number-p.number;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getNoID() {
		return noID;
	}
	public void setNoID(String noID) {
		this.noID = noID;
	}
	public int getNumber() {
		return number;
	}
	public void setNumber(int number) {
		this.number = number;
	}
	
}