...data.txt文件中,然后再从文件中读取第一行数据,并统

发布网友发布时间：2024-10-05 01:43

共2个回答

热心网友时间：2024-10-30 14:17

import java.io.*;
import java.util.*;
public class Egg{
    public static void main(String[] args) throws Exception{
        FileWriter fw = new FileWriter("data.txt");
        String word = "Look Boddy, U got work harder and put yourself into your deck ,one you learned the heart of the cards ,i can guarantee that you win.";
        fw.write(word);
        fw.flush();
        fw.close();
        Scanner scan = new Scanner(new File("data.txt"));
        String str = "";
        if(scan.hasNextLine()){
            str = scan.nextLine();
        }
        scan.close();
        HashMap<String, Integer> map = new HashMap<String, Integer>();
        for(int i = 0; i < str.length(); i++){
            String s = str.charAt(i) + "";
            if(null == map.get(s)){
                map.put(s, 1);
            }else{
                int x = map.get(s);
                map.put(s, x + 1);
            }
        }
        System.out.println(map);
    }
}

热心网友时间：2024-10-30 14:13

/**
     * 将一段话写入一个文本
     * @param args
     * @throws IOException
     */
    public static void writeText(String path,String words) throws IOException{
        FileWriter fw = new FileWriter(path);
        fw.append(words);
        fw.close();
    }

    /**
     * 读取一个文本的第一行
     * @param args
     * @throws IOException
     */
    public static String readFirstLine(String path) throws IOException{
        FileReader fr = new FileReader(path);
        BufferedReader br = new BufferedReader(fr);
        return br.readLine();
    }

    /**
     * 统计字符串中每个字符出现的次数
     * @param args
     */
    public void getTotal(String str){
        Map<String, Integer> maps = new HashMap<String, Integer>();
        for(int i = 0; i < str.length(); i++) {
            String temp = str.substring(i, i + 1);
            Integer count = maps.get(temp);
            if(count == null) {
                count = 1;
            } else {
                count++;
            }
            maps.put(temp, count);
        }
        for(String key : maps.keySet()) {
            System.out.println(key + "出现的次数为" + maps.get(key));
        }
        //得出最小次数的字母
        Integer minCount = null;
        for(String key : maps.keySet()) {
            if(minCount == null || maps.get(key) < minCount) {
                minCount = maps.get(key);
            }
        }
        //得到最小的字母
        Character minChar = null;
        for(String key : maps.keySet()) {
            if((int)maps.get(key) == minCount) {
                if(minChar == null || key.charAt(0) < minChar) {
                    minChar = key.charAt(0);
                }
            }
        }
        System.out.println("结果是：字母  " + minChar + " 次数最少，只有：" + minCount);
    }