Question

有没有办法使用扫描仪获得用户输入的自定义输出？

例如：

"files.associations": {
    "*": "shellscript"
},

所以当我执行它时，这是输出

import java.util.Scanner;

public class test {
    public static void main(String args[]){
        Scanner input = new Scanner(System.in);
        System.out.println("Choose one of the fruits:\n"+
            "1)Mango\n"+
            "2)Apple\n"+
            "3)Melon\n"+
            "4)Papaya\n");
        String fruit = input.next();
        if (fruit.equals("1") || fruit.equals("Mango")) {

        }
    }
}

然后退出......

我想要的是

Choose one of the fruits:
1)Mango
2)Apple
3)Melon
4)Papaya

1

按下1它应该打印芒果选择...好吧我可以为此添加println但我也想不显示1或芒果（无论用户输入什么）而不是我想显示我的自定义消息..

怎么做？

Answer 1

您可以将它们添加到地图中，然后通过键

获取它们

 import java.util.Scanner;

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

    Map<Integer, String> selection = Maps.newHashMap();

    selection.put(1, "Mango");
    selection.put(2, "Apple");
    selection.put(3, "Melon");
    selection.put(4, "Papaya");

    Scanner input = new Scanner(System.in);

    System.out.println("Choose one of the fruits:\n"+
     "1)Mango\n"+
     "2)Apple\n"+
     "3)Melon\n"+
     "4)Papaya\n");

    int fruit = input.nextInt();

     System.out.println("you selected " + selection.get(fruit));  
    }
}

如果您不想通过控制台输入选择，那么您可以使用对话框

   Map<Integer, String> selection = Maps.newHashMap();

    selection.put(1, "Mango");
    selection.put(2, "Apple");
    selection.put(3, "Melon");
    selection.put(4, "Papaya");

    System.out.println("Choose one of the fruits:\n"+
    "1)Mango\n"+
    "2)Apple\n"+
    "3)Melon\n"+
    "4)Papaya\n");

    int mySelection = Integer.valueOf(JOptionPane.showInputDialog("Enter 
    your selection here"));

    System.out.println("you selected " + selection.get(mySelection));

Answer 2

我将你的水果存储在一个数组中，并根据用户从所述数组输入的内容打印该选项。

String[] list = new String[]{"Mango", "Apple", "Melon", "Papaya"};

首先将它们打印到控制台：

System.out.println(Arrays.toString(list));

然后只需打印用户选项：

System.out.println("Choose a fruit:");
int fruit = input.nextInt();
System.out.println(list[fruit - 1] + " selected.");

Try it online!

使用扫描程序在java中自定义输出用户输入

2 个答案: