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我的目標是計算幾個已參加多個主題考試的學生的成績分數。學生記錄將被存儲在一個數組中。 請在下面找到我的代碼： 打印出學生記錄時，我能夠打印外部for循環內的所有記錄，但無法打印主題（在inner for循環內）。我收到錯誤「arrayoutofindex」。如何在Java中使用嵌套循環讀取數組中的值
package Assignment;
import java.util.ArrayList;
import java.util.Scanner;
/**
*
* @author Administrator
*/
public class Assignment {
// String name;
int totalMarks;
String surname;
String firstname;
int studNo;
String subject;
Assignment(String surname, String firstname, int studNo, String subject) {
// this.name=name;
// this.totalMarks=totalMarks;
this.firstname = firstname;
this.surname = surname;
this.studNo = studNo;
this.subject = subject;
}
// public String getName(){
// return name;
// }
public String getSName() {
return surname;
}
public String getFName() {
return firstname;
}
public int getTotalMarks() {
return totalMarks;
}
public int getStudNo() {
return studNo;
}
public String getSubject() {
return subject;
}
public static boolean validSubject(String sub) {
return sub.matches("[1-5]");
}
public static void main(String[] args) {
ArrayList<Assignment> list = new ArrayList<Assignment>();
ArrayList<String> l = new ArrayList<String>();
// boolean validSub = false;
int times;
// int numTimes = 1;
// int sub=0;
// int times;
String[] subs;
String sub = "";
Scanner input = new Scanner(System.in);
System.out.print("How many students are in the class?: ");
int sNo = input.nextInt();
int count[] = new int[sNo];
String[] fname = new String[sNo];
String[] sname = new String[sNo];
int[] stud_No = new int[sNo];
// int marks[]=new int[sNo];
for (int i = 0; i < count.length; i++) {
System.out.printf("Student%2d:\n", i + 1);
System.out.print("Student Number: ");
int s_No = input.nextInt();
System.out.print("Enter Firstname:");
String f = input.next();
System.out.print("Enter Surname:");
String s = input.next();
System.out.println("Choose one from the underlisted subjects:");
System.out.println("Subjects:1. Boat Maintenance");
System.out.println("\t 2. Basic sail control");
System.out.println("\t 3. Blue-water Navigation");
System.out.println("\t 4. Chart reading");
System.out.println("\t 5. Laws & Customs of the Sea");
System.out.print("How many subjects will you want to process, Maximum of 3: ");
int subNo = input.nextInt();
int[] subj = new int[subNo];
subs = new String[subNo];
for (times = 0; times < subj.length; times++) {
System.out.printf("Subject%2d: ", times + 1);
// System.out.println("Subject: ");
sub = input.next();
subs[times] = sub;
}
// }
// System.out.print("Enter marks in test1:");
// int t1=input.nextInt();
// System.out.print("Enter marks in test2:");
// int t2=input.nextInt();
// int m=t1+t2;
fname[i] = f;
sname[i] = s;
stud_No[i] = s_No;
// subs[i] = sub;
// subj[i] = sub;
// subj[times] = sub;
// subj[times] = sub;
// marks[i]=m;
list.add(new Assignment(sname[i], fname[i], stud_No[i], subs[times]));
// subs[times] = sub;
}
// int lowest = marks[0];
// int highest = marks[0];
// int counter = count[i];
//
// for(int i=1; i< marks.length; i++)
// {
// if(marks[i] > highest)
// highest = marks[i];
// else if (marks[i] < lowest)
// lowest = marks[i];
// }
for (Assignment a : list) {
// if(a.getTotalMarks()==highest){
// System.out.println(a.getFName() + " get the highest marks");
// }
// if(a.getTotalMarks()==lowest){
// System.out.println(a.getFName() + " get the lowest marks");
// }
System.out.println(a.getFName() + " " + a.getSName());
System.out.println("Student Number: " + a.getStudNo());
System.out.println("Subjects: " + a.getSubject());
System.out.println("=================================");
// System.out.println(subs[times]);
}
}
}