java实现学生成绩录入系统的项目讲解

public class Score { 
  public String name; 
  public double EnglishGrade, MathGrade,phyicalGrade, 
  chemicalGrade,biologicalGrade; 
  Score() { 
 
  } 
 
  public Score(String name,double EnglishGrade, 
      double MathGrade,double phyicalGrade, 
      double chemicalGrade,double biologicalGrade){ 
    this.name = name; 
    this.EnglishGrade = EnglishGrade; 
    this.MathGrade = MathGrade;  
    this.phyicalGrade = phyicalGrade; 
    this.chemicalGrade = chemicalGrade; 
    this.biologicalGrade = biologicalGrade; 
     
  } 
 
} 

package score; 
 
public class ScoreZip { 
  Score[] S = new Score[5]; 
 
  public void setData(Score name, int index) {//添加成绩类到成绩数组中 
    S[index] = name; 
  } 
 
  public Score[] getData() { //返回学生数组 
    return S; 
  } 
 
  public Score SerchData(String name) { //查找学生各科成绩 
    for (int index = 0; index < S.length; index++) { 
      if (name !=null && S[index] != null ) 
        if (S[index].name.equals(name)){ 
          return S[index]; 
        } 
     } 
    return null; 
  } 
} 

package score; 
 
import java.util.Scanner; 
 
 
public class ScoreZip2 { 
  public static void main(String[] arr) { 
    Scanner Sc = new Scanner(System.in); 
    ScoreZip Sr = new ScoreZip(); 
    for (int i = 0; i < 5; i++) { //这里定义长度为五的学生成绩表 
      System.out.println("输入学生姓名:"); 
      String name = Sc.next(); 
      if (name.equals("n")) { 
        break; 
      } 
      System.out.println("英语分数:"); 
      double English = Sc.nextDouble(); 
      System.out.println("数学分数:"); 
      double Math = Sc.nextDouble(); 
      System.out.println("物理分数:"); 
      double Physical = Sc.nextDouble(); 
      System.out.println("化学分数:"); 
      double Chemical = Sc.nextDouble(); 
      System.out.println("生物分数:"); 
      double Biology = Sc.nextDouble(); 
       
       
      Score s = new Score(name, English,Math,Physical,Chemical,Biology); 
      Sr.setData(s, i); 
    } 
    System.out.println("=========================================" + 
        "学生成绩表======================================"); 
    System.out.println("姓名\t\t英语成绩\t\t数学成绩\t\t物理成绩\t\t化学成绩\t\t生物成绩"); 
    Score[] b = Sr.getData(); 
    for (Score S : b) { 
      if (S == null) { 
        break; 
      } 
      System.out.println(S.name + "\t\t" + S.EnglishGrade+"\t\t"+S.MathGrade 
          +"\t\t"+S.phyicalGrade+"\t\t"+S.chemicalGrade+"\t\t"+S.biologicalGrade); 
    } 
    System.out.println("是否查找学生成绩？ 是Y 否N"); 
    String flag = Sc.next(); 
    if(flag.equals("Y")){ 
    System.out.println("输入要查找的学生名:"); 
    String name = Sc.next(); 
    Score S = Sr.SerchData(name); 
    if (S == null) { 
      System.out.println("对不起，没有此学生名"); 
    } else { 
      double mg = S.MathGrade; 
      double eg = S.EnglishGrade; 
      double pg = S.phyicalGrade; 
      double cg= S.chemicalGrade; 
      double bg = S.biologicalGrade; 
      double submit = mg+eg+pg+cg+bg; 
      System.out.println("要查找的学生为:" + name + "\n数学成绩为:" + mg 
          + "\n英语成绩为:" + eg+ "\n物理成绩为:" + pg+ "\n化学成绩为:" + cg 
          + "\n生物成绩为:" + bg+ "\n总成绩成绩为:" + submit); 
       } 
    } 
  } 
}