java面向对象之学生通讯录

java面向对象之学生通讯录

定义一个学生类用来存储学生的信息（包括：学号、姓名、英语成绩、高数成绩、体育成绩），在main方法中定义一个数字存储5名学生的信息。
要求：
1.按名字查询并输出成绩
2.查询并输出所有科目不及格的人数及名单

•  Student类

  package com.student;
  /**
   * 学生类 保存学生的基本信息
   * @author anneli
   *
   */
  public class Student {
  	private int Sno;
  	private String Name;
  	private int English;
  	private int HighNumber;
  	private int Sport;
  	public static int c;
  	
  	
  	
  	public Student() {
  		super();
  		c++;
  		// TODO Auto-generated constructor stub
  	}
  
  	/**
  	 * 构造方法 初始化信息
  	 * @param Sno 学号
  	 * @param Name 姓名
  	 * @param English 英语成绩
  	 * @param HighNumber 高数成绩
  	 * @param Sport 体育成绩
  	 */
  	public Student(int Sno,String Name,int English,int HighNumber,int Sport) {
  		// TODO Auto-generated method stub
  		this.Sno = Sno;
  		this.Name = Name;
  		this.English = English;
  		this.HighNumber = HighNumber;
  		this.Sport = Sport;
  	}
  
  	public int getSno() {
  		return Sno;
  	}
  
  	public void setSno(int sno) {
  		Sno = sno;
  	}
  
  	public String getName() {
  		return Name;
  	}
  
  	public void setName(String name) {
  		Name = name;
  	}
  
  	public int getEnglish() {
  		return English;
  	}
  
  	public void setEnglish(int english) {
  		English = english;
  	}
  
  	public int getHighNumber() {
  		return HighNumber;
  	}
  
  	public void setHighNumber(int highNumber) {
  		HighNumber = highNumber;
  	}
  
  	public int getSport() {
  		return Sport;
  	}
  
  	public void setSport(int sport) {
  		Sport = sport;
  	}
  
  	@Override
  	public String toString() {
  		return "Student [Sno=" + Sno + ", Name=" + Name + ", English=" + English + ", HighNumber=" + HighNumber
  				+ ", Sport=" + Sport + "]";
  	}
  	
  }
  

• StudentList类 

  package com.student;
  import java.util.ArrayList;
  
  /**
   * 学生表 实现学生表的增删查找
   * @author anneli
   *
   */
  public class StudentList {
  	private ArrayList stdList = new ArrayList();
  
  	/**
  	 * 增加学生到学生表
  	 * @param std 学生对象
  	 */
  	public void _add(Student std) {
  		stdList.add(std);
  	}
  	
  	/**
  	 * 按内容查询 模糊查询 输出查询到的学生姓名和成绩
  	 * @param value 查询内容
  	 */
  	public void query(String value) {
  		for (int i = 0; i < stdList.size(); i++) {
  			if (stdList.get(i).getName().contains(value)) {
  				System.out.println("姓名："+stdList.get(i).getName()+" 英语成绩："+stdList.get(i).getEnglish()+" 高数成绩："+stdList.get(i).getHighNumber()+" 体育成绩："+stdList.get(i).getSport());
  			}
  		}
  		System.out.println();
  	}
  	
  	/**
  	 * 输出学生表的详细信息
  	 */
  	public void print() {
  		for (int i = 0; i < stdList.size(); i++) {
  			System.out.println("学号："+stdList.get(i).getSno()+" 姓名："+stdList.get(i).getName()+" 英语成绩："+stdList.get(i).getEnglish()+" 高数成绩："+stdList.get(i).getHighNumber()+" 体育成绩："+stdList.get(i).getSport());
  		}
  		System.out.println();
  	}
  	
  	/**
  	 * 查询不及格的学生并输出
  	 */
  	public void fail() {
  		int people = 0;
  		System.out.print("英语成绩不及格的有：");
  		for (int i = 0; i < stdList.size(); i++) {
  			if (stdList.get(i).getEnglish()<60) {
  				System.out.print(stdList.get(i).getName()+" ");
  				people++;
  			}
  		}
  		System.out.print("总共有"+people+"人\n");
  		
  		people = 0;
  		System.out.print("高数成绩不及格的有：");
  		for (int i = 0; i < stdList.size(); i++) {
  			if (stdList.get(i).getHighNumber()<60) {
  				System.out.print(stdList.get(i).getName()+" ");
  				people++;
  			}
  		}
  		System.out.print("总共有"+people+"人\n");
  		
  		people = 0;
  		System.out.print("体育成绩不及格的有：");
  		for (int i = 0; i < stdList.size(); i++) {
  			if (stdList.get(i).getSport()<60) {
  				System.out.print(stdList.get(i).getName()+" ");
  				people++;
  			}
  		}
  		System.out.print("总共有"+people+"人\n");
  		
  		System.out.println();
  	}
  }
  
  
  

• Main类

  package com.student;
  
  /**
   * 实现类 测试代码
   * @author anneli
   * @date 2019年9月23日 下午3:04:38 
   *
   */
  public class Main {
  	
  	public Main() {
  	}
  
  	public static void main(String[] args) {
  		Student zhangsan = new Student(20192301, "zhangsan", 88, 55, 88);
  		Student zhangsan1 = new Student(20192302, "wangwu", 66, 66, 55);
  		Student zhangsan2 = new Student(20192303, "xiaoming", 55, 66, 77);
  		Student zhangsan3 = new Student(20192304, "lige", 55, 55, 59);
  		
  		StudentList stdList = new StudentList();
  		stdList._add(zhangsan);
  		stdList._add(zhangsan1);
  		stdList._add(zhangsan2);
  		stdList._add(zhangsan3);
  		
  		Student s1 = new Student();
  		System.out.println(s1.c);
  		Student s2 = new Student();
  		System.out.println(s2.c);
  		
  		stdList.print();
  		stdList.query("ing");
  		stdList.fail();
  	}
  	
  }