java - 使用java中的方法时无法循环

Question

对不起这些家伙，但我今天真的很不幸。请帮忙，我不久前的问题是循环时遇到问题，现在根本无法循环。它不会让我输入字符串以使其循环。名称、年份和部分也输出为空。我也尝试过使用 try catch 但它似乎没有发现任何错误。这是整个程序。它刚刚终止，恰好在:

enter 1 to continue;

import java.util.*;

public class program
{
     public static Scanner rew= new Scanner(System.in);
    public static String name, yearandsec;
    public static char sex_code;

    public static int scode;
    public static double seq;
    public static int ccode;
    public static int units;
    public static double fee_per_unit;
    public static double misc;
    public static double gross;
  public static String dec;


    public static String decision;

    public static void main(String[] args) {
        String dec;
        do {
            System.out.println("Input info:");
            String name = stringGetter("Name: ");
            String yearandsec = stringGetter("Year and section: ");

 sex_code=charGetter("Sex code: " + "\n"  + "[M]" + "\n" + "[F]:");
        scode=intGetter("Scholarship code: ");
        ccode=intGetter("Course code: ");
        units=intGetter("Units: ");

        fee_per_unit=doubleGetter("Fee per unit: ");
        misc=doubleGetter("Miscellaneous: ");
        display();
         switches(scode, units, fee_per_unit, misc);

            dec = stringGetterz("Enter 1 to continue: ");
        } while(dec.equals("1"));
    }

    public static String stringGetterz(String ny){
        System.out.println(ny);
        return rew.nextLine();
    }


  public static char charGetter(String cg){
        String sc;
        char cc;
        System.out.print(cg);
        sc=rew.nextLine();
        cc=sc.charAt(0);
        return cc;

    }




   public static void switches(int scholar, int u, double fpu, double mi){
        double discnt=0;
        switch(scholar){
                case 1:
                    System.out.println("Scholarship: Full Scholar..");
                    discnt=1;
                    break;
                case 2:
                    System.out.println("Scholarship: Half Scholar..");
                   discnt=.50;
                    break;
                case 3:
                    System.out.println("Scholarship: Dean's Lister..");
                   discnt=.15;
                    break;
                case 4:
                    System.out.println("Scholarship: None..");
                   discnt=0;
                    break;
        }

        double gf;
        double disc;
        disc =(u * fpu) *discnt;
        gf=(u * fpu) + mi - disc;
       System.out.println(gf);


    }

    public static void switchcase(char gender, int corz){
        double discnt=0;
        switch(gender){
                case 'M':
                case 'm':
                    System.out.println("Sex: Male");
                    break;
                case 'F':
                case 'f':
                    System.out.println("Sex: Female");
                    break;
            }




            switch(corz){
                case 1:
                     System.out.println("Course: BSIT...");

                    break;
                case 2:
                     System.out.println("Course: BSCS..");
                     break;
                case 3:
                     System.out.println("Course: BSCOE..");
                     break;


            }




    }



    public static void display(){
        System.out.println("Name: " + name + "\n" + "Year and Section: " + yearandsec);
        System.out.println("Units enrolled: " + units + "\n" + "Fee per unit: " + fee_per_unit + "\n" + "Miscellaneous: " + misc);
        switchcase(sex_code, ccode);







    }

    public static double doubleGetter(String dg){
        double fm;
        System.out.println(dg);
        fm=rew.nextDouble();
        return fm;


    }
    public static int intGetter(String scu){
        int iget;
        System.out.println(scu);
        iget=rew.nextInt();
        return iget;

    }

    public static String stringGetter(String ny){
       String sget;
        System.out.println(ny);
       sget=rew.nextLine();
       return sget;

    }

}

Answer 1

^{静态字段在您第一次初始化类的实例时初始化，因此在您创建 new program() 之前，这些字段将不存在。此外，这些字段不会存在于主函数中。将当前的 main 方法重命名为 run 之类的名称，然后使用以下内容作为 main 方法:}

public static void main(String args[]){
    program p = new program();
    p.run();
}

编辑:显然我错了，代码可以运行。显然，既然你运行了它......

通过将 stringGetterz 中的 rew.nextLine() 更改为 rew.next() 可以解决您的问题。不知道为什么。