java的课程表求解
我该怎么存储中文输入并输出，怎么最简便方法使输出表格整齐？怎么分成几个类？其实为什么要分几个类我也不知道？
程序代码：/*
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*/
package reportcard;
import java.util.Scanner;
import java.text.*;
/**
*
* @author Administrator
*/
public class Reportcard {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
String [][]s3=new String [100][3];
int [][]s4=new int [100][6];
int i=1;
String a;
System.out.println("现在要创建一个成绩单：");
Scanner input =new Scanner(System .in);// TODO code application logic here
System.out.print("请输入课程名称：");
String s =input.next();
System.out.print("请输入教师名称：");
String s1 =input.next();
System.out.print("请输入班级名称：");
String s2 =input.next();
System.out.print("请输入学生人数：");
int n=input.nextInt();
chengji(s3,s4,n);
System.out.print("成绩单已创建成功！！\n请输入指令：\n查看成绩单：请输入“1”\n查询成绩：请输入“2”\n退出选择：请输入“0”\n");
caidan(s3,s4,s,s1,s2,n);
}
public static void caidan(String s3[][],int s4[][],String s,String s1,String s2,int n){
Scanner input =new Scanner(System .in);
int i=1;
while(i==1){
String a =input.nextLine();
switch(a){
case"1":{chengjidan(s3,s4,s,s1, s2,n);break;}
case"2":{chaxunchengji(s3,s4,n);break;}
case"0":{i=0;break;}
}
System.out.print("请输入指令：\n查看成绩单请输入“1”\n查询成绩请输入“2”\n退出选择请输入“0”\n");
}
}
public static void chengji(String s[][],int s2[][],int n){
Scanner input =new Scanner(System .in);
for(int i=1;i<=n;i++){
System.out.print("请输入第"+i+"个学生的学号：");
s[i][1]=input.nextLine();
System.out.print("请输入学生姓名：");
s[i][2]=input.nextLine();
chengji2(s2,i);
}
}
public static void chengji2(int s2[][],int i){
Scanner input =new Scanner(System .in);
System.out.print("请输入学生考勤成绩：");
s2[i][1]=input.nextInt();
System.out.print("请输入学生测验成绩：");
s2[i][2]=input.nextInt();
System.out.print("请输入学生作业成绩：");
s2[i][3]=input.nextInt();
System.out.print("请输入学生期末成绩：");
s2[i][4]=input.nextInt();
s2[i][5]=s2[i][4]+s2[i][3]+s2[i][2]+s2[i][1]+s2[i][0];
}
public static void chengjidan(String s[][],int s2[][],String a,String b,String c,int n){
int []x=new int [5];
DecimalFormat df=new DecimalFormat("#.##");
double e;
System.out.println(" 期末考试成绩单 ");
System.out.println("课程 ："+a);
System.out.println("教师 ："+b);
System.out.println("班级 ："+c);
System.out.println("学号 姓名 考勤 小测 作业 期末 总评 ");
for(int i=1;i<=n;i++){
System.out.printf("%-11s%-9s%-9s%-9s%-9s%-9s%-9s\n",s[i][1],s[i][2],s2[i][1],s2[i][2],s2[i][3],s2[i][4],s2[i][5]);
}
for(int i=0;i<5;i++){
x[i]=0;
}
for(int i=1;i<=n;i++){
if(s2[i][5]>=90) x[0]++;
else
if(s2[i][5]<90&&s2[i][5]>=80) x[1]++;
else
if(s2[i][5]<80&&s2[i][5]>=70) x[2]++;
else
if(s2[i][5]<70&&s2[i][5]>=60) x[3]++;
else
x[4]++;
}
System.out.println("成绩区段 人数 百分比");
e=x[0]*1.0/n;
String st=df.format(e);
System.out.printf("90~100 %-15s",x[0]);
System.out.println(st);
e=x[1]*1.0/n;
System.out.printf("80~89 %-15s",x[1]);
st=df.format(e);
System.out.println(st);
e=x[2]*1.0/n;
System.out.printf("70~79 %-15s",x[2]);
st=df.format(e);
System.out.println(st);
e=x[3]*1.0/n;
System.out.printf("60~69 %-15s",x[3]);
st=df.format(e);
System.out.println(st);
e=x[4]*1.0/n;
System.out.printf("0~60 %-15s",x[4]);
st=df.format(e);
System.out.println(st);
}
public static void chaxunchengji(String s[][],int s2[][],int n){
String a;
int i;
Scanner input =new Scanner(System .in);
System.out.print("查询学生的学号：");
a =input.nextLine();
for( i=1;i<=n;i++){
if(a.equals(s[i][1])) {System.out.println("学号 姓名 考勤 小测 作业 期末 总评 ");
System.out.printf("%-11s%-9s%-9s%-9s%-9s%-9s%-9s\n",s[i][1],s[i][2],s2[i][1],s2[i][2],s2[i][3],s2[i][4],s2[i][5]);
break;
}
}
if(i>n) System.out.println("没有此人，请确认输入是否正确");
}
}
