学生成绩管理系统-java-版

//这个程序，可以完成基本的学生成绩管理，可以对学生增加，删除和按平均分排序等基本操作//希望下载的朋友们可以看懂，学到一点知识~~~

package Student;

public class Student {

private String id; // 学号

private String name; // 姓名

private int engl; // 英语成绩

private int math; // 数学成绩

private int comp; // 计算机成绩

private double aver; // 平均分

private Student students[]; // 学生

public static int size = 0; // 人数

Student() {

};

Student(String id, String name, int engl, int math, int comp) { size++;

this.id = id;

= name;

this.engl = engl;

this.math = math;

p = comp;

aver = average();

}

public Student(Student s) {

this.id = s.id;

= new String();

this.engl = s.engl;

this.math = s.math;

p = p;

this.aver = s.average();

}

public void insertsort() { // 按平均分排序

Student temp = new Student();

for (int i = 0; i < size; i++)

for (int j = 0; j < size - i - 1; j++) {

if (students[j].aver > students[j + 1].aver) {

temp = students[j];

students[j] = students[j + 1];

students[j + 1] = temp;

}

}

}

public Student[] getStudents() {

return students;

}

public boolean addStudent(Student addstudent) { //增加学生// this.students=new Student[size];

boolean flag=false;

for(int i=0;i

if(addstudent.id.equals(students[i].id))

flag=true;

break;

}

if(flag==false)

{

students[size - 1] = addstudent;

return true;

}

else

return false;

}

public boolean subStudent(String id) { //按学号删除学生int i;

for (i = 0; i < size; i++) {

if (id.equals(students[i].id))

break;

else

return false;

}

int top = i;

for (int j = top + 1; j < size; j++) {

students[j - 1] = students[j];

}

size--;

return true;

}

public void setStudents(Student[] students) { this.students = new Student[100];

for (int i = 0; i < size; i++)

this.students[i] = new Student(students[i]); }

double average() {

return (engl + math + comp) / 3;

}

String getId() {

return id;

}

String getName() {

return name;

}

int getEnglish() {

return engl;

}

int getMath() {

return math;

}

int getComputer() {

return comp;

}

double getAverage() {

return aver;

}

int getSize() {

return size;

}

public void fanilize() {

size--;

}

public String toString() {

String s;

s = " "+ "学号"+ "\t"+ "姓名"+ "\t"+ "英语"+ "\t"+ "数学" + "\t"

+ "计算机" + "\t" + "平均分\n";

for (int i = 0; i < size; i++)

s = s + " "+ students[i].getId() + "\t"+ students[i].getName() + "\t " + students[i].getEnglish() + "\t"

+ students[i].getMath() + "\t" +

students[i].getComputer()

+ "\t" + students[i].getAverage() + "\n";

return s;

}

}

package Student;

import java.util.*;

public class textStudent {

/**

*@param args

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

// ArrayList students = new ArrayList();

/*

* Student students[]; students = new Student[5]; int i; for (i = 0;

i <

* 5; i++) { students[i] = new Student(getAStudent(i + 1)); } Student

* stu = new Student(); stu.setStudents(students);

* System.out.print(stu);

*

* System.out.print("增加学生"); Student student1[]=new

Student[i+1];