手机英文9键说明如下

1：@!./	2：abc	3：def
4：ghi	5:  jkl	6：mno
7：pqrs	8：tuv	9：wxyz

数字键输入第一个字母点击一次，第二个字母连续点击两次，以此类推

统计输入字符串（英文小写，包含英文26个字母和@!./标点符号），如果通过手机9键输入，各个数字键的点击次数

import java.util.HashMap; import java.util.Map; import java.util.Scanner;  /**  * @Author：lihang  */ public class NineKeyInputCount {  public static void main(String[] args) {  Scanner scanner = new Scanner(System.in);  System.out.print("Enter the input string: ");  String inputString = scanner.next().toLowerCase();   Map<Character, Integer> keyCounts = new HashMap<>();  keyCounts.put('1', 0);  keyCounts.put('2', 0);  keyCounts.put('3', 0);  keyCounts.put('4', 0);  keyCounts.put('5', 0);  keyCounts.put('6', 0);  keyCounts.put('7', 0);  keyCounts.put('8', 0);  keyCounts.put('9', 0);   Map<Character, String> keyMapping = new HashMap<>();  keyMapping.put('1', "@!./");  keyMapping.put('2', "abc");  keyMapping.put('3', "def");  keyMapping.put('4', "ghi");  keyMapping.put('5', "jkl");  keyMapping.put('6', "mno");  keyMapping.put('7', "pqrs");  keyMapping.put('8', "tuv");  keyMapping.put('9', "wxyz");   for (char ch : inputString.toCharArray()) {  for (char digit : keyMapping.keySet()) {  String letters = keyMapping.get(digit);  if (letters.contains(Character.toString(ch))) {  int keyCount = keyCounts.get(digit);  int letterIndex = letters.indexOf(ch);  keyCounts.put(digit, keyCount + letterIndex + 1);  break;  }  }  }   for (char digit : keyCounts.keySet()) {  int count = keyCounts.get(digit);  System.out.println("Key " + digit + ": " + count + " times");  }  } }

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