我有一个HashMap如何将它与GUI集成;我想输入Integer＆amp;获取String值。

Question

我有五十个国家的HashMap;我想使用一个GUI，你从HashMap输入整数，结果是String.I知道＆＃34; JOptionPane＆＃34;但我不知道如何将其与GUI集成。

import java.util.HashMap;

public class FIftyStates {

public static void main(String[] args) {

    HashMap<Integer, String> FiftyStates = new HashMap <Integer, String>();




    FiftyStates.put(1,"Delaware");
    FiftyStates.put(2,"Pennsylvania");
    FiftyStates.put(3,"New Jersey"); 
    FiftyStates.put(4,"Georgia");
    FiftyStates.put(5,"Connecticut");
    FiftyStates.put(6,"Massachusetts" );
    FiftyStates.put(7,"Maryland");
    FiftyStates.put(8,"South Carolina");
    FiftyStates.put(9,"New Hampshire");
    FiftyStates.put(10,"Virginia");
    FiftyStates.put(11,"New York");
    FiftyStates.put(12,"North Carolina");
    FiftyStates.put(13,"Rhode Island");
    FiftyStates.put(14,"Vermont");
    FiftyStates.put(15,"Kentucky");
    FiftyStates.put(16,"Tennessee");
    FiftyStates.put(17,"Ohio");
    FiftyStates.put(18,"Louisiana");
    FiftyStates.put(19,"Indiana");
    FiftyStates.put(20,"Mississippi");
    FiftyStates.put(21,"Illinois");
    FiftyStates.put(22,"Alabama");
    FiftyStates.put(23,"Maine");
    FiftyStates.put(24,"Missouri");
    FiftyStates.put(25,"Arkansas");
    FiftyStates.put(26,"Michagan");
    FiftyStates.put(27,"Florida");
    FiftyStates.put(28,"Texas");
    FiftyStates.put(29,"Iowa");
    FiftyStates.put(30,"Wisconsin");
    FiftyStates.put(31,"California");
    FiftyStates.put(32,"Minnesota");
    FiftyStates.put(33,"Oregon");
    FiftyStates.put(34,"Kansas");
    FiftyStates.put(35,"West Virginia");
    FiftyStates.put(36,"Nevada");
    FiftyStates.put(37,"Nebraska");
    FiftyStates.put(38,"Colorado");
    FiftyStates.put(39,"North Dakota");
    FiftyStates.put(40,"South Dakota");
    FiftyStates.put(41,"Montana");
    FiftyStates.put(42,"Washington");
    FiftyStates.put(43,"Idaho");
    FiftyStates.put(44,"Wyoming");
    FiftyStates.put(45,"Utah");
    FiftyStates.put(46,"Oklahoma");
    FiftyStates.put(47,"New Mexico");
    FiftyStates.put(48,"Arizona");
    FiftyStates.put(49,"Alaska");
    FiftyStates.put(50,"Hawaii");
}

}

Answer 1

你可以......

做类似的事情......

const fs = require('fs');
var contents = fs.readFileSync('inject.txt').toString();

但坦率地说，这是一个非常可怕的用户体验，而不是......

你可以......

做更像......的事情。

int selected = -1;
do {
    String value = JOptionPane.showInputDialog(null, "Pick a state: ", "Pick a state", JOptionPane.QUESTION_MESSAGE);
    try {
        selected = Integer.parseInt(value);
    } catch (NumberFormatException exp) {
        selected = -1;
    }
} while (selected == -1);

JOptionPane.showMessageDialog(null, "You selected " + FiftyStates.get(selected));

可以提供更好的用户体验

  

我怎样才能打印＆＃34;整数＆＃34;还有吗？

Object value = JOptionPane.showInputDialog(null, "Help", "Help", JOptionPane.QUESTION_MESSAGE, null, FiftyStates.values().toArray(new String[FiftyStates.size()]), null);
JOptionPane.showMessageDialog(null, "You selected " + value);