字符串分类统计

// 输入一行字符，分别统计出其中英文字母、数字、空格和其他字符的个数。 Scanner sc = new Scanner(System.in); String str = sc.nextLine(); int english = 0, shuzi = 0, kongge = 0, qita = 0; for (int i = 0; i < str.length(); i++) { char out = str.charAt(i); if (out >= 'a' && out <= 'z' || out >= 'A' && out <= 'Z') { english++; } else if (out >= '0' && out <= '9') { shuzi++; } else if (out == ' ') { kongge++; } else { qita++; } } System.out.print(english+" "+shuzi+" "+kongge+" "+qita);