Java 如何编写方法定义？

这是我的方法签名，我正在写一个很长的代码，它应该更新学生的分数，更新成绩表中的信息，给定一个学生编号、考试编号和yada yada yada。无论如何，在所有这些之前，我要为一个方法写一个方法定义，有人知道如何做的通用格式吗？顺便说一下，这是我的代码：

import java.util.Scanner;
public class GradeBook {
    private int numberofStudents;
    private int numberofTests;
    private int studId;

    private int [] [] table;

    private GradeBook()
    {
        Scanner keyboard = new Scanner (System.in);

        System.out.println("Enter the number of student in the class");

        int numberofStudents = keyboard.nextInt();

        System.out.println("Enter the number of tests taken for the term");
        int numberOfTests = keyboard.nextInt();

        table = new int [numberofStudents][numberofTests];
        System.out.println("Enter the students marks by ID number");

        System.out.println();
        for(int studId = 1; studId <= numberofStudents; studId++) {

                System.out.println('\n' + "Student ID: " + studId);
                for(int testNo =1; testNo <= numberOfTests; testNo++) {
                        System.out.println(" Test Number: " + testNo + '\t');

                        table [studId -1] [testNo - 1] = keyboard.nextInt();
        }
    }
}
    private void display()
    {
        int row, column;
        for(row =0; row<table.length; row++);
        {    
            System.out.print("Student ID: " + (row +1) + "Tests: ");

            for(column = 0; column < table[row]. length; column++)
                System.out.print(table[row] [column] + " ");

            System.out.println();
        }    
   }

    public static void main(String[] args) {
        GradeBook myBook = new GradeBook();
        myBook.display();
        // TODO Auto-generated method stub

    }

}

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首先，显示类定义，而不是方法签名

您可能希望简化该构造函数，这样就不会在那里做太多工作。只需初始化一个表

public class GradeBook {

    private int[][] table;

    public GradeBook(int students, int tests) {
        this.table = new int[students];
        for (int i = 0; i < students; i++) {
            this.table[i] = new int[tests];
        } 
        loadGrades();
    }

我认为应该将提示移到main方法中，而不是对象构造函数中

    public static void main(String[] args) {

        Scanner keyboard = new Scanner (System.in);

        System.out.println("Enter the number of student in the class");
        int numberofStudents = keyboard.nextInt();

        System.out.println("Enter the number of tests taken for the term");
        int numberOfTests = keyboard.nextInt();

        GradeBook g = new GradeBook(numberofStudents, numberOfTests);
        g.display();
    } 
}

---

成绩册是一个建设者，不是一个方法。。。你确实有一个方法显示，所以我不明白你需要什么。不，我知道它是一个构造函数，我想知道如何编写一个你已经做过的方法定义。官方文件中的私人文件：以及更详尽的解释：

    public static void main(String[] args) {

        Scanner keyboard = new Scanner (System.in);

        System.out.println("Enter the number of student in the class");
        int numberofStudents = keyboard.nextInt();

        System.out.println("Enter the number of tests taken for the term");
        int numberOfTests = keyboard.nextInt();

        GradeBook g = new GradeBook(numberofStudents, numberOfTests);
        g.display();
    } 
}