Java 实现：输入多个名字并按首字母轻松分组的实用小程序

```java import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Scanner; public class NameGrouping { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); Map<String, List<String>> groupedNames = new HashMap<>(); System.out.println("请输入名字，每输入一个名字后按回车键。输入'结束'以停止输入。"); while (true) { String name = scanner.nextLine(); if (name.equalsIgnoreCase("结束")) { break; } char firstChar = name.toLowerCase().charAt(0); if (!groupedNames.containsKey(String.valueOf(firstChar))) { groupedNames.put(String.valueOf(firstChar), new ArrayList<>()); } groupedNames.get(String.valueOf(firstChar)).add(name); } System.out.println("分组后的名字列表："); for (Map.Entry<String, List<String>> entry : groupedNames.entrySet()) { System.out.println(entry.getKey() + ": " + entry.getValue()); } } } ``` ######[AI写代码神器 | 332点数解答 | 2024-07-29 14:11:07]