废话不多说,实际就只是我学习中的记录。
下面直接上代码!
1 import java.util.Scanner; 2 public class ScannerTest { 3 4 public static void main(String[] args) { 5 show1(); 6 } 7 private static void show1(){ 8 int countUpper=0; 9 int countLower=0; 10 int countNum=0; 11 int countOfter=0; 12 Scanner scanner = new Scanner(System.in); 13 System.out.print("请输入字符串:"); 14 String next = scanner.next(); 15 System.out.print("字符串长度为:"); 16 int num = next.length(); 17 System.out.println(num); 18 //转换成byte类型容易比较 19 byte[] bytes = next.getBytes(); 20 //测试字符大小 21 //System.out.println(bytes[0]); 22 //循环迭代字符数量 23 for (int i = 0; i <next.length() ; i++) { 24 if(bytes[i]<=58&&bytes[i]>=49){ 25 countNum++; 26 }else if(bytes[i]<=122&&bytes[i]>=97){ 27 countLower++; 28 }else if(bytes[i]<=90&&bytes[i]>=65){ 29 countUpper++; 30 }else{ 31 countOfter++; 32 } 33 } 34 System.out.print("输入的字符串有:\n"+countUpper+"个大写字母!"); 35 System.out.print(""+countLower+"个小写字母!"); 36 System.out.print(""+countNum+"个数字!"); 37 System.out.print(""+countOfter+"个其他字符!"); 38 } 39 }