方法

创建字符串接收器，接收用户输入的字符串，然后将其转换为字符串数组，安装字符对应的字节码进行判断。

代码

import java.io.*;
public class StaticsChar 
{public static void main(String[] args) throws IOException{String zifuchuan = new String("");int hanzishu=0;int zimu=0;int kongge=0;int shuzi=0;int qita=0;System.out.print("请输入一行字符串：");BufferedReader stdin = new BufferedReader(new InputStreamReader(System.in));zifuchuan=stdin.readLine();byte[] bytes = zifuchuan.getBytes();for(int i=0;i<bytes.length;i++){if((bytes[i]>=65 && bytes[i]<=90)||(bytes[i]>=97 && bytes[i]<=122)){zimu++;}else if(bytes[i]==32){kongge++;}else if(bytes[i]>=48 && bytes[i]<=57){shuzi++;}else if(bytes[i]<0){hanzishu++;}else{qita++;}}System.out.println("字符串所占字节个数为"+bytes.length);System.out.println("汉字个数为"+hanzishu/2);System.out.println("英文字母个数为"+zimu);System.out.println("空格个数为"+kongge);System.out.println("数字个数为"+shuzi);System.out.println("其它字符个数为"+qita);}
}

结果