接口 案例 打印：学生成绩： 平均数

package interface02; import java.util.ArrayList; public class StudentOperatormpl2 implements StudentOperator { @Override public void printAllinfo(ArrayList<Student> students) { System.out.println("----------全班全部学生信息如下---------"); int count1=0; int count2=0; for (int i=0;i<students.size();i++){ Student s= students.get(i); System.out.println("学生姓名："+s.getName()+"学生性别："+s.getSex()+"学生成绩："+s.getScorel()); if (s.getSex()=='男'){ count1++; }else { count2++; } } System.out.println("男生人数是："+count1+",女士人数是："+count2); System.out.println("班级总人数是："+students.size()); System.out.println("-------------------------------"); } @Override public void printAverageScore(ArrayList<Student> students) { //定义一个变量 System.out.println("-----------平均分--------------"); double allScore=0.0; double max=students.get(0).getScorel(); double mini=students.get(0).getScorel(); for (int i=0;i<students.size();i++){ Student s= students.get(i); allScore+=s.getScorel(); if (s.getScorel()>max)max=s.getScorel(); if (s.getScorel()<mini)mini=s.getScorel(); } double l= (allScore/students.size()-2); System.out.println("学生的最高分："+max); System.out.println("学生的最低分："+mini); System.out.println("学生平均分"+l); } }