Java的8 大基本类型的包装类和美女选妃案例的两种写法

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8 大基本类型的包装类

包装类的类型	包装的类型
Byte	byte
Short	short
Integer	int
Long	long
Float	float
Double	double
Character	character
Boolean	boolean

一.用列表的方式实现美女选妃

package com.zhongruan;

import java.util.*;

public class Zuoye {
public List getHighs(){
List highs = new ArrayList<>();
highs.add(180);
highs.add(170);
highs.add(160);
return highs;
}
public List getwighs(){
List weights=new ArrayList<>();
weights.add(50);
weights.add(60);
weights.add(70);
return weights;
}
public Map<String,Integer>getSumHAndSumW(List highs,List wights){
int sumH=0;
for (int h:highs){
sumH=sumH+h;
}
System.out.println(sumH);

    int sumW=0;for (int w:wights){sumW=sumW+w;}System.out.println(sumW);Map map=new HashMap();map.put("sgh",sumH);map.put("tzh",sumW);return map;
}
public Map<String,Integer> getAvg(Map<String,Integer>map){int sumH=map.get("sgh");int sumW=map.get("tzh");int avgH=sumH/3;int avgW=sumW/3;Map<String,Integer> avgMap=new HashMap<>();avgMap.put("pjsg",avgH);avgMap.put("pjtz",avgW);return avgMap;}
public  String getResult(Map<String, Integer> avgM) {int avgH = avgM.get("pjsg");int avgW = avgM.get("pjtz");if (avgH > 150 && avgW < 100) {return "是美女";} else {return "不是美女";}}public static void main(String[] args){Zuoye zuoye=new Zuoye();List<Integer> highs=zuoye.getHighs();List<Integer> weights=zuoye.getwighs();Map<String, Integer> map = zuoye.getSumHAndSumW(highs,weights);Map<String, Integer> avgM = zuoye.getAvg(map);String s = zuoye.getResult(avgM);System.out.println(s);

}
}

二.用列表的方式实现美女选妃

package com.zhongruan;

import java.util.Scanner;

public class Xf{
public static void main(String[] args){
Scanner sr=new Scanner(System.in);
System.out.println(“请输入美女人数：”);
int length=sr.nextInt();
//计算身高总和
int data[] = {170,160, 165, 166, 157, 163,152, 167,158, 169};
int zh=0;
for(int i = 0; i < length; i++) {
zh = zh+ data[i];
}
System.out.println(“身高总和:”+zh);

    //计算体重总和int data1[] = {106, 80, 110, 150, 147, 100,100, 108,135, 124};int tzh=0;for(int i = 0; i < length; i++) {tzh = tzh+ data1[i];}System.out.println("体重总和:"+tzh);double pjsg=zh/length;double pjtz=tzh/length;System.out.print("平均身高是:"+pjsg);System.out.print("\n平均体重是:"+pjtz);if (pjsg>150 && pjtz<200 ){System.out.print("\n合格");}else {System.out.print("\n不合格");}
}

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