我在学习爪哇课程,我碰到了砖墙。我的任务是开发一个简单的命令行程序。为了让事情更加容易,我得到了以下样本代码来修改,这样我就不必从头开始。

package assignment;

public class Main {
private final static String[] mainMenuOpts = {"Students","Lecturers","Admin","Exit"};
private final static String[] studentMenuOpts = {"Add Student","List all Students","Find a Student","Return to Main Menu"};
private Menu mainMenu = new Menu("MAIN MENU",mainMenuOpts);
private Menu studentMenu = new Menu("STUDENT MENU",studentMenuOpts);
private DataStore data = new DataStore();
private java.io.PrintStream out = System.out;
private ReadKb reader = new ReadKb();
/** Creates a new instance of Main */
public Main() {
    run();
}

private void run(){
    int ret = mainMenu.display();
    while(true){
        switch(ret){
            case 1: students();break;
            case 2: lecturers(); break;
            case 3: admin(); break;
            case 4: exit(); break;
        }
        ret = mainMenu.display();
    }
}
private void students(){
    int ret = studentMenu.display();
    while(ret != 4){
        switch(ret){
            case 1: addStudent();break;
            case 2: listStudents(); break;
            case 3: findStudent(); break;
        }
        ret = studentMenu.display();
    }
}
private void lecturers(){
    out.println("
Lecturers not yet implemented");
}
private void admin(){
    out.println("
Admin not yet implemented");
}
//Student methods
private void addStudent(){
    out.println("
	Add New Student");
    //prompt for details
    //add student to the datastore
    //ask if they want to enter another student - 
    // if so call addStudent again
    //otherwise the method completes and the studentMenu will display again

}
private void listStudents(){
    out.println("
	Student Listing");
    //list all students from the datastore
}
private void findStudent(){
    out.println("
	Find Student");
    out.print("Enter Search String: ");
    //reasd search text
    //use datastore method to get list of students that contain the search string
    //display matching students

}
// end Student methods
private void exit() {
    data.save();  //call the datastore method that will save to file
    out.println("

Goodbye :)");
    System.exit(0);
    }
}

我使用NetBeans, 当我尝试运行这个项目时,我得到这个错误:

Error: Main method not found in class assignment.Main, please define the main method as: public static void main(String[] args)

我只是想让程序运行, 这样我就能更好地了解代码。 我理解错误, 但不知道该在哪里执行这堵文字墙中的主要方法。 我试验了好几个小时, 但显然作为一个新人我完全没用。 任何帮助都会非常感激。