定义一个类People,成员变量有姓名,出生日期,性别,身高，体重等,成员方法有计算年龄,并创建该类的对象.

import java.util.Scanner;

public class People
{
        private int[] age; 
        private double[] height; 
        private double[] weight; 
        private String[] sex; 
        private Date[] birthday; 

        public People (int n) 
        { 
        this.age = new int[n]; 
        this.height = new double[n]; 
        this.weight = new double[n]; 
        this.sex = new String[n]; 
        this.birthday = new Date[n]; 

        Scanner in = new Scanner(System.in); 
                for (int i = 0; i< n; i++) 
                { 
                System.out.println("Please input the age, height, weight, sex,and birthday"); 
                age[n] = in.nextInt(); 
                height [n] = in.nextDouble(); 
                weight [n] = in.nextDouble(); 
                sex[n] = in.next(); 
                birthday[n] = new Date(in.nextInt(),in.nextInt(),in.nextInt()); 
                } 
        }

}