输入一行字符，分别统计出其中英文字母、空格、数字和其它字符的个数

import java.util.Scanner;
public class Prog7_1{
	public static void main(String[] args){
		System.out.print("请输入一串字符：");
		Scanner scan = new Scanner(System.in);
		String str = scan.nextLine();//将一行字符转化为字符串
		scan.close();
		count(str);
	}
	//统计输入的字符数
	private static void count(String str){
		String E1 = "[\u4e00-\u9fa5]";//汉字
		String E2 = "[a-zA-Z]";
		String E3 = "[0-9]";
		String E4 = "\\s";//空格
		int countChinese = 0;
		int countLetter = 0;
		int countNumber = 0;
		int countSpace = 0;
		int countOther = 0;
		char[] array_Char = str.toCharArray();//将字符串转化为字符数组
		String[] array_String = new String[array_Char.length];//汉字只能作为字符串处理
		for(int i=0;i<array_Char.length;i++)
		  array_String[i] = String.valueOf(array_Char[i]);
		//遍历字符串数组中的元素
		for(String s:array_String){
			if(s.matches(E1))
			  countChinese++;
			else if(s.matches(E2))
			  countLetter++;
			else if(s.matches(E3))
			  countNumber++;
			else if(s.matches(E4))
			  countSpace++;
			else
			  countOther++;
		}
		System.out.println("输入的汉字个数："+countChinese);
		System.out.println("输入的字母个数："+countLetter);
		System.out.println("输入的数字个数："+countNumber);
		System.out.println("输入的空格个数："+countSpace);
		System.out.println("输入的其它字符个数："+countSpace);
	}
}

import java.util.*;
public class Prog7_2{
	public static void main(String[] args){
	  System.out.println("请输入一行字符：");
	  Scanner scan = new Scanner(System.in);
	  String str = scan.nextLine();
	  scan.close();
	  count(str);
	}
	//统计输入的字符
	private static void count(String str){
		List<String> list = new ArrayList<String>();
		char[] array_Char = str.toCharArray();
		for(char c:array_Char)
		  list.add(String.valueOf(c));//将字符作为字符串添加到list表中
		Collections.sort(list);//排序
		for(String s:list){
			int begin = list.indexOf(s);
			int end = list.lastIndexOf(s);
			//索引结束统计字符数
			if(list.get(end)==s)
			  System.out.println("字符‘"+s+"’有"+(end-begin+1)+"个");
		}
	}
}