java - 尝试使用数据创建菜单

Question

我正在尝试使用我从另一篇文章中看到的数据 Creating a console menu for user to make a selection创建一个菜单，用户可以在其中选择一个选项。当我运行我的程序时，它会抛出几个错误。也许我没有正确导入它，但这是唯一的方法我能想到。

import java.util.Random;
import java.util.Data;
public class Main{
public static void main(String[] args) {
System.out.println("Please enter 1 if you'd like to guess the computer's number or enter 2 to have the computer guess your number. If 2, please enter a number between 1-100 after you enter 2. ");
Data data = new Data();
    data.menu();

    Scanner scanner = new Scanner(System.in);
    int choice = scanner.nextInt();

    switch (choice) {
        case 1:
        double r = (Math.random()*((100-1)+1))+min;

        int win = 0;
        while (win != 1);
        System.out.println("The computer has guessed a number, please make a guess. ");
        int u1 = scanner.nextInt();  
        if (r > u1)
        System.out.println("Too low.");
        else if (r < u1)
        System.out.println("Too high.");
        else if (r == u1){
        System.out.println("You guessed it!!!!!!! Congratulations!!!!!!!!!!");
        int win = win + 1 ;}
        else
        System.out.println();
         break;
        case 2:
        System.out.println("You'd like myself, the computer to guess huh, well be prepared to get destroyed!");
        int un = scanner.nextInt();
        if (un == 36){
        System.out.println("Chandler I told you not to!!!!!!");
        break;}
        else
        System.out.println();

        System.out.println("Your number is " + un);
          break;


        default:
        System.out.println("You weren't supposed to do that!!!! Stop the program and run it again. Congrats! You broke it! Chandler, if you entered 36, ");
        TimeUnit.SECONDS.sleep(5);
        System.out.print("you've been banned!");
}

}

}

Answer 1

所有编译器错误按顺序排列。

import java.util.Data; // Does not exist, @MadProgrammer is correct, causes error
Data data = new Data(); // Error, Data cannot be resolved as to a type

Scanner scanner = new Scanner(System.in); // You did not import java.util.Scanner.
// Scanner cannot be resolved to a type.

double r = (Math.random()*((100-1)+1))+min; // min cannot be resolved to a variable
// You didn't define it

System.out.println("The computer has guessed a number, please make a guess. ");
int win = win + 1 ;} // win was a variable that was previously defined. Just change it 
from "int win =" to "win = "

TimeUnit.SECONDS.sleep(5); // Did you mean to import java.util.concurrent.TimeUnit;

此外，如果您想“禁止”某人使用您的程序，那么为什么不创建一个 .txt 文件来读取，这可以帮助您的程序记住它之前是否已被“破坏”。