java 以a为开头单词的词典查询示例

import java.io.*;
import java.util.*;
public class Hash_map {
    public static void main(String[] args) {
        Scanner in=new Scanner(System.in);
        File fi=new File("dict.txt");
        try {
            BufferedReader dict=new BufferedReader(new InputStreamReader(new FileInputStream(fi)));
            String line_text="";
            String unknow;
            HashMap find_word=new HashMap();
            int i=0;
            while(i<562){
                line_text=dict.readLine();
                //System.out.println(line_text);
                String[] _map=line_text.split(" ");
                //System.out.println(_map[0]+_map[_map.length-1]);
                find_word.put(_map[0], _map[_map.length-1]);                
                i+=1;
            }
            System.out.println("查询首字母为a的单词！当输入为q时推出程序！");
            System.out.println("输入要查找的单词：");
            unknow=in.next();
            while(unknow.equals("q")==false){
                System.out.println(find_word.get(unknow.toLowerCase()));
                System.out.println("输入要查找的单词：");
                unknow=in.next();
            }
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        System.out.println("查询结束！");
        word_up_find();
    }
    public static void word_up_find(){
        Scanner in=new Scanner(System.in);
        int count=0;
        System.out.println("判断字符串中大写字母的个数！以输入q结束");
        String word=in.next();
        while(word.equals("q")==false){
            char[] st=word.toCharArray();
            for(int i=0;i<st.length;i++){
                if(st[i]>=‘A‘&&st[i]<=‘Z‘)
                    count+=1;
        }
            System.out.println(count);
            System.out.println("输入要判断的单词：");
            word=in.next();
        }
        System.out.println("判断结束！");
        
        
    }
}