[英]How do you set user work as root in Linux, when the bash script runs via Java code
[英]how to connect the methods to each other like in my code when the user press 2 it will have to go to snack but instead it runs the code to meals java
import java.util.Scanner;
public class MP3
{
//這是我需要將每個方法連接到每個方法的主要代碼。 //這樣,如果用戶按 2,它就會去吃零食,但即使你現在按 2,它也會繼續執行代碼並去吃飯。 //我怎樣才能讓用戶可以選擇他/她喜歡瀏覽的菜單?
public static void main(String[] args)
{
int Options_Snacks;
int Options_Snacks2;
int Options_Snacks3;
int Options_Drinks;
int Options_Drinks2;
int Options_Drinks3;
int diff,prod ;
int yes = 1;
int no = 2;
int End;
do {
mainmenu();
mainmeals();
mainsnacks();
Scanner myInput = new Scanner(System.in);
System.out.println("Would you like to order more: press " + yes +" for yes and " + no +" for no");
End = myInput.nextInt();
} while(End == 1);
}
// 此代碼運行流暢,但當用戶按下數字時,其他菜單不會運行,而是運行 while 循環中的所有代碼。
public static void mainmenu()
{
int Orders;
int Meals = 1;
int Snacks = 2;
int Drinks = 3;
int EXIT = 4;
Scanner myInput = new Scanner(System.in);
System.out.println("=======[STRESSFOOD]=====");
System.out.println("---------[ Menu ]-------");
System.out.println("1----------Meals--------");
System.out.println("2---------Snacks--------");
System.out.println("3---------Drinks--------");
System.out.println("4--------[ EXIT ]-------");
Orders = myInput.nextInt();
}
[here's the code I didn't get all in the picture][1]
}
下面的實現怎么樣:
public static void main(String[] args) {
openMenu();
}
使用菜單功能中的while循環:
private static void openMenu() {
Scanner scan = new Scanner(System.in);
do {
System.out.println("1) Meals");
System.out.println("2) Snacks");
System.out.println("3) Drinks");
System.out.println("4) Exit");
System.out.print("Your choice ? ");
switch (scan.nextInt()) {
case 1:
openMealsMenu();
break;
case 2:
openSnacksMenu();
break;
case 3:
openDrinksMenu();
break;
case 4:
scan.close();
return;
default:
System.out.println("This is not a valid choice");
}
} while (true);
}
請注意,您的應用程序中應僅使用一台掃描儀。 例如,如果您需要在 openMealsMenu() 中使用掃描儀,請將其作為方法的參數傳遞,或者僅在 MP3 類中聲明一個靜態掃描儀,因為您的方法在同一類中。
順便說一下,按照慣例,變量應該以小寫字母開頭並且不帶_
(即Options_Drinks3
變成optionsDrinks3
)。
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