"Checking Account“Java程序

Question

又见面了，StackOverflow。我回来了，在我的代码中有一个新的问题。是的，这是为学校(高中)准备的。我的问题是。到目前为止，这是我的代码。

import java.util.Scanner;

class Main {
  public static void main(String[] args) {

    Scanner moneyTime = new Scanner(System.in);

    System.out.println("Hello world!");

    int dep;
    int with;
    int balance = 1200;
    int choice;

    while(1 == 1)
    {
      System.out.println(" ");
      System.out.printf("%s%d", "Current Balance: $", balance);
      System.out.println(" ");
      System.out.println("What would you like to do:");
      System.out.println("Type 1 for [DEPOSIT]");
      System.out.println("Type 2 for [WITHDRAWAL]");
      System.out.println("Type 3 for [EXIT/FINAL]");
      choice = moneyTime.nextInt();

      if(choice == 1)
      {
        System.out.print("Amount: ");
        dep = moneyTime.nextInt();
        deposit(balance, dep);
        System.out.println("Testing: " + balance);
      }
      else if(choice == 2)
      {
        System.out.print("Amount: ");
        with = moneyTime.nextInt();
        withdrawl(balance, with);
        System.out.println("Testing2: " + balance);
      }
      else
      {
        exitORfinal();
      }
    }

    static int deposit(int balance, int dep)
    {
    int balance1 = balance + dep;
    return balance1;
    }

    static int withdrawal(int balance, int with)
    {
    int balance1 = balance - with;
    return balance1;
    }

    static int exitORfinal
    {
    System.out.println("Testing Text to make sure thiworks");
    }

  }
}

我在代码中遇到的问题是底部的静态不工作，并且打印出这些错误。

exit status 1
Main.java:46: error: illegal start of expression
    static int deposit(int balance, int dep)
    ^
Main.java:46: error: ';' expected
    static int deposit(int balance, int dep)
                      ^
Main.java:46: error: <identifier> expected
    static int deposit(int balance, int dep)
                                   ^
Main.java:46: error: not a statement
    static int deposit(int balance, int dep)
                                        ^
Main.java:46: error: ';' expected
    static int deposit(int balance, int dep)
                                           ^
Main.java:52: error: illegal start of expression
    static int withdrawal(int balance, int with)
    ^
Main.java:52: error: ';' expected
    static int withdrawal(int balance, int with)
                         ^
Main.java:52: error: <identifier> expected
    static int withdrawal(int balance, int with)
                                      ^
Main.java:52: error: not a statement
    static int withdrawal(int balance, int with)
                                           ^
Main.java:52: error: ';' expected
    static int withdrawal(int balance, int with)
                                               ^
Main.java:58: error: illegal start of expression
    static int exitORfinal
    ^
Main.java:58: error: ';' expected
    static int exitORfinal
                          ^
12 errors
exit status 1
Main.java:46: error: illegal start of expression
    static int deposit(int balance, int dep)
    ^
Main.java:46: error: ';' expected
    static int deposit(int balance, int dep)
                      ^
Main.java:46: error: <identifier> expected
    static int deposit(int balance, int dep)
                                   ^
Main.java:46: error: not a statement
    static int deposit(int balance, int dep)
                                        ^
Main.java:46: error: ';' expected
    static int deposit(int balance, int dep)
                                           ^
Main.java:52: error: illegal start of expression
    static int withdrawal(int balance, int with)
    ^
Main.java:52: error: ';' expected
    static int withdrawal(int balance, int with)
                         ^
Main.java:52: error: <identifier> expected
    static int withdrawal(int balance, int with)
                                      ^
Main.java:52: error: not a statement
    static int withdrawal(int balance, int with)
                                           ^
Main.java:52: error: ';' expected
    static int withdrawal(int balance, int with)
                                               ^
Main.java:58: error: illegal start of expression
    static int exitORfinal
    ^
Main.java:58: error: ';' expected
    static int exitORfinal
                          ^
12 errors

我真的很困惑。我知道我可能遗漏了什么，或者我对一个明显的错误完全视而不见。我不知道该怎么做，我试了所有我知道的。我会问老师，但她确实是个笨蛋，即使我们问过其他学生，她也不会帮助任何人。

再次感谢你的帮助(如果我真的得到了任何帮助)。

Answer 1

第一个你需要将你在main方法中创建的所有方法移出main方法，第二个你需要在exitORfinal静态方法中添加一些参数例如: exitORfinal() { ..} Third您必须将moneyBoi变量替换为moneyTime，因为您声明为moneyTime。Fourth必须将取款方法重命名为取款。

您的代码如下所示：

import java.util.Scanner;

class Main {
    static int exitORfinal() {
        System.out.println("Testing Text to make sure thiworks");
    }

    public static void main(String[] args) {

        Scanner moneyTime = new Scanner(System.in);

        System.out.println("Hello world!");

        int dep;
        int with;
        int balance = 1200;
        int choice;

        while (1 == 1) {
            System.out.println(" ");
            System.out.printf("%s%d", "Current Balance: $", balance);
            System.out.println(" ");
            System.out.println("What would you like to do:");
            System.out.println("Type 1 for [DEPOSIT]");
            System.out.println("Type 2 for [WITHDRAWAL]");
            System.out.println("Type 3 for [EXIT/FINAL]");
            choice = moneyTime.nextInt();

            if (choice == 1) {
                System.out.print("Amount: ");
                dep = moneyTime.nextInt();
                deposit(balance, dep);
                System.out.println("Testing: " + balance);
            } else if (choice == 2) {
                System.out.print("Amount: ");
                with = moneyTime.nextInt();
                withdrawl(balance, with);
                System.out.println("Testing2: " + balance);
            } else {
                exitORfinal();
            }
        }
    }    

    static int deposit(int balance, int dep) {
        int balance1 = balance + dep;
        return balance1;
    }

    static int withdrawl(int balance, int with) {
        int balance1 = balance - with;
        return balance1;
    }
}

1. For修复第一个：需要知道所有方法都是在类中声明的，而不是在方法中声明的。defining methods
2. For修复第二个：需要知道任何方法都需要一些参数，即使是空的someMethod() { ... }
3. For修复第三个和第四个：需要知道您创建的方法的名称，这必须与在任何方法上调用它的名称相同。

Answer 2

下面的代码如何：

import java.util.Scanner;

class Main {
    static int deposit(int balance, int dep) {
        return balance + dep;
    }

    static int withdrawl(int balance, int with) {
        return balance - with;
    }

    static void exitORfinal() {
        System.out.println("Testing Text to make sure thiworks");
    }

    public static void main(String[] args) {
        Scanner moneyTime = new Scanner(System.in);
        System.out.println("Hello world!");

        int dep;
        int with;
        int balance = 1200;
        int choice;

        while (true) {
            System.out.println(" ");
            System.out.printf("%s%d", "Current Balance: $", balance);
            System.out.println(" ");
            System.out.println("What would you like to do:");
            System.out.println("Type 1 for [DEPOSIT]");
            System.out.println("Type 2 for [WITHDRAWAL]");
            System.out.println("Type 3 for [EXIT/FINAL]");
            choice = moneyTime.nextInt();

            if (choice == 1) {
                System.out.print("Amount: ");
                dep = moneyTime.nextInt();
                deposit(balance, dep);
                System.out.println("Testing: " + balance);
            } else if (choice == 2) {
                System.out.print("Amount: ");
                with = moneyTime.nextInt();
                withdrawl(balance, with);
                System.out.println("Testing2: " + balance);
            } else {
                exitORfinal();
            }
        }
    }    


}

我认为将这些静态方法放在main方法之前会更好。

Answer 3

简单地说就是:你的各种方法(exitORfinal，withdrawal，deposit)的声明都在你的main方法的声明中。在java中，方法不能在另一个方法体中定义，你必须将它们移到你的类体中。

另外，我可以建议您使用高效的集成开发环境(Eclipse、Netbeans，或者任何带有VSCode或SublimeText等Java插件的像样的编辑器)吗？它会很好地强调这个问题，甚至会提出修复建议。