這是我用Java編的增加學(xué)生信息的代碼，不和數(shù)據(jù)庫(kù)連接，怎樣實(shí)現(xiàn)查找和更新功能啊，求大神幫忙?。?！小女子感激不盡import java.util.Scanner;public class xinguan{public static void main(String []args){?? Scanner input=new Scanner(System.in);?? /*增加學(xué)生信息*/???? for(int i=1;i<3;i++){?System.out.println("第"+i+"個(gè)學(xué)生");???? System.out.println("請(qǐng)輸入學(xué)號(hào)");???? int []num=new int[28];???? num[i]=input.nextInt();???? System.out.println("請(qǐng)輸入學(xué)生姓名");???? String[] name=new String[28];???? name[i]=input.next();???? System.out.println("請(qǐng)輸入數(shù)學(xué)成績(jī)");???? double[] math=new double[28];???? math[i]=input.nextDouble();???? System.out.println("請(qǐng)輸入語(yǔ)文成績(jī)");???? double[]chinese=new double[28];???? chinese[i]=input.nextDouble();???? System.out.println("請(qǐng)輸入英語(yǔ)成績(jī)");???? double[] english=new double[28];???? english[i]=input.nextDouble();???? double grades=math[i]+chinese[i]+english[i];???? double avg=grades/3;???? System.out.println("學(xué)號(hào)"+num[i]+"姓名"+name[i]+"數(shù)學(xué)成績(jī)"+math[i]+"語(yǔ)文成績(jī)"+chinese[i]+"英語(yǔ)成績(jī)"+english[i]+"總成績(jī)"+grades+"平均分"+avg);???? }????? ??????? ? System.out.println("請(qǐng)輸入要查找的學(xué)號(hào)");??????? ? int num=input.nextInt();??????? ???????? ? ???????? }??? ?? ??? ?? ????? }?/*查找學(xué)生信息*/?? ??