93 从4个女朋友中找到 小于平均值的女朋友的信息

对象

package com.fqs.demo002;

public class Gril {
    //属性
    private String name;
    private int age;
    private char sex;
    private String love;

    public Gril() {
    }

    public Gril(String name, int age, char sex, String love) {
        this.name = name;
        this.age = age;
        this.sex = sex;
        this.love = love;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public char getSex() {
        return sex;
    }

    public void setSex(char sex) {
        this.sex = sex;
    }

    public String getLove() {
        return love;
    }

    public void setLove(String love) {
        this.love = love;
    }
}

方法

package com.fqs.demo002;

public class GirlTest {
    public static void main(String[] args) {
        Gril []grils=new Gril[4];
       grils[0]=new Gril("小明",18,'女',"唱歌");
        grils[1]=new Gril("小蓝",59,'女',"跳舞");
        grils[2]=new Gril("小红",20,'女',"rap");
        grils[3]=new Gril("小白",61,'男',"篮球");
        double avgAge=getAvg(grils);

        //获取小于平均值的个数
        int countIndex=getXiao(grils,avgAge);
        //获取小于平均值数的下标数组
        int []arrOK=getIndex(countIndex,grils,avgAge);//比如{2,3}

        for (int i = 0; i <countIndex ; i++) {
            //要打印的数组
            int iindex=arrOK[i];
            System.out.println("小于平均值的数组："+grils[iindex].getName()+
                    grils[iindex].getAge()+grils[iindex].getSex()+grils[iindex].getLove());


        }





    }
    //获取平均年龄
    public static double getAvg(Gril []grils) {
        int sum=0;
        double avg=0;
        for (int i = 0; i < grils.length; i++) {
            sum=sum+grils[i].getAge();
        }
        avg=sum/grils.length;
        return avg;
    }
    //获取小于平均年龄的人的个数
    public static int getXiao(Gril []grils,double avgAge) {
        int count=0;


        for (int i = 0; i <grils.length; i++) {
            int tempAge=grils[i].getAge();
            if(tempAge<avgAge){
                //找到小于平均年纪的目标
                count++;
            }

        }
        return count;

    }
    //获取小于拼环境年龄的人的下标的数组

    public static int[] getIndex(int count,Gril []grils,double avgAge) {


        //将小于平均值的数组的下标放到一个新的数组中
        int[]arr=new int[count];


        boolean isFind=false;//找到小于平均值的数组了吗  返回下标；
        for (int i = 0; i < grils.length; i++) {
            int tempAge=grils[i].getAge();
            if(tempAge<avgAge){
                //找到小于平均年纪的女孩  并放到新数组中
                isFind=true;
                arr[0]=i;
            }
        }return arr;
    }


}