对象群体的组织

[java]代码库
package textstudent;
 import java.io.*;
public class Student implements Serializable {
    private String id;
    private String name;
    private int eng;
    private int math;
    private int comp;
    private int sum;
    public Student(String id,String name,int eng,int math,int comp){
        this.id=id;
        this.name=name;
        this.eng=eng;
        this.math=math;
        this.comp=comp;
        sum();
    }
    public Student (Student s) {
        this.id=s.id;
        this.name=new String(s.name);
        this.eng= s.eng;
        this.math=s.math;
        this.comp=comp;
        sum();
    }
    public void setId(String id) {//set方法
        this.id=id;
    }
    public void setName(String name) {
        this.name=name;
    }
    public void setEng(int eng) {
        this.eng=eng;
        sum();
    }
    public void setMath(int math) {
        this.math=math;
        sum();
    }
    public void setComp(int comp) {
        this.comp=comp;
        sum();
    }
    public String getId() {//get方法
        return id;
    }
    public String getName() {
        return name;
    }
    public double getEng() {
        return eng;
    }
    public double getMath() {
        return math;
    }
    public double getComp() {
        return comp;
    }
    public double getSum() {
        return sum;
    }
    //计算总成绩
    void sum() {
        this.sum=eng+comp+math;
    }
    public String toString() {//toString方法
        return (getId()+"\t"+getName()+"\t"+getEng()+"\t"+getMath()+"\t"+getComp()+"\t"+getSum());
    }
    public boolean equals(Object x) {//equal方法
        if(this.getClass()!=x.getClass()) {
            return false;
        }
        Student b=(Student)x;
        return(this.getId().equals(b.getId()));
    }
    public int compare(Student A) {//compare方法
        if(this.getSum()>A.getSum()) {
            return 1;
        }
        else if(this.getSum()==A.getSum()) {
            return 0;
        }
        else {
            return-1;
        }
    }        
}
---------------------------------------------------------------------------------------------
package textstudent;
 
public class StudentClass {
    private String name;
    static int capacity=2;
    private Student students[];
    private int size;
     
    public StudentClass(String name,int size) {
        this.name=name;
        this.size=size;
        students=new Student[capacity];
    }
    public String getName() {
        return name;
    }
    public int getCapacity() {
        return capacity;
    }
    public Student[] getStudents() {
        return students;
    }
    public int getsize() {
        return size;
    }
    public void setName() {
        this.name=name;
    }
    public void setCapavity() {
        this.capacity=capacity;
    }
    public void setSize() {
        if(size>capacity) {
            System.out.println("size为"+size+",不能超过"+capacity);
            return;
        }
        this.size=size;
    }
    public void setStudents(Student...students) {
        for(int i=0;i<size;i++) {
            this.students[i]=new Student(students[i]);
        }
        this.size=students.length;
    }
    public String toString() {
        String s;
        s="班级"+name+"\t"+"容量"+capacity+"\t"+"实际人数"+size+"\n\n";
        s=s+"学号"+"\t"+"姓名"+"\t"+"英语"+"\t"+"数学"+"\t"+"计算机"+"\t"+"总成绩\n";
        for(int i=0;i<size;i++) {
            s=s+students[i].getId()+"\t"+students[i].getName()+"\t"+students[i].getEng()+"\t"+students[i].getMath()+"\t"+students[i].getComp()+"\t"+students[i].getSum()+"\n";
        }
        return s;
    }
}
------------------------------------------------------------------
package textstudent;
import java.io.*;
public class Keyboard {
    static BufferedReader inputStream = new BufferedReader(new InputStreamReader(System.in));
    public static int getInteger() {
        try {
            return(Integer.valueOf(inputStream.readLine().trim()).intValue());
        }
        catch (Exception e) {
            e.printStackTrace();
            return 0;
        }
    }
    public static String getString() {
        try {
            return(inputStream.readLine());
        }
        catch (IOException e) {
            return "0";
        }
    }
}
--------------------------------------------------------------------------
package textstudent;
import java.io.*;
public class Tester {
    public static void main(String[] args) {
        Student students[];
        StudentClass aClass=new StudentClass("软件 0201",5）;
        students=new Student[aClass.getsize()];
        for(int i=0;i<aClass.getsize();i++){
            students[i]=new Student(getAStudent(i+1));
        }
        aClass.setStudents(students);
        String sss=aClass.toString();
        System.out.println(aClass);
        try {
            FileOutputStream fo=new FileOutputStream("stu.ser");
            ObjectOutputStream so=new ObjectOutputStream(fo);
            for(Student s:students) {
                so.writeObject(s);
            }
            so.close();
        }
        catch(Exception e) {
            System.out.println(e);
        }
    }
    public static Student getAStudent(int i) {
        Student studenti;
        System.out.println("输入第"+i+"个学生的信息:");
        System.out.println("学号");
        String id=Keyboard.getString();
        System.out.println("姓名");
        String name=Keyboard.getString();
        System.out.println("英语成绩");
        int eng=Keyboard.getInteger();
        System.out.println("数学成绩");
        int math=Keyboard.getInteger();
        System.out.println("计算机成绩");
        int comp=Keyboard.getInteger();
        studenti=new Student(id,name,eng,math,comp);
        return studenti;
    }
}
[代码运行效果截图]
用户注册

用户登录

发表随想

该用户最新代码

编程随想

[java]代码库

[代码运行效果截图]

网友评论 (发表评论)

发表评论：

评论须知：

扫码下载

输入口令后可复制整站源码
