介绍 package javatest;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;
public class Demo {
public 才能;static void main (String [], args), {
,,,Scanner Scanner =, new 扫描仪(系统);
,,,System.out.println(“请输入,:“);
,,,String inputStr =, scanner.nextLine ();
,,,System.out.println (“inputStr :“, +, inputStr);
,,,File File =, new 文件(“D:/测试/test01.txt");
,,,FileOutputStream fileOut;
,,,try {
,,,,,fileOut =, new FileOutputStream(文件);
,,,,,fileOut.write (inputStr.getBytes ());
,,,},catch (FileNotFoundException e), {
,,,,,e.printStackTrace ();
,,,},catch (IOException e), {
,,,,,e.printStackTrace ();
,,,}
,,,String result =,““
,,,try {
,,,,,BufferedReader br =, new BufferedReader (new FileReader(文件));//构造一个BufferedReader类来读取文件
,,,,,String s =,空;
,,,,,while ((=s br.readLine ()), !=, null),{//使用readLine方法,一次读一行
,,,,,,,result =, result +, s +,“,“;
,,,,,}
,,,,,br.close ();
,,,},catch (Exception e), {
,,,,,e.printStackTrace ();
,,,}
,,,System.out.println(“- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -产生绯闻;);
,,,System.out.println(结果);
,,,String [], arr =, result.split (“,“);
,,,System.out.println (Arrays.toString (arr));
,,,System.out.println (arr.length);
,,,Map<字符串,Integer>, map =, new HashMap<在();
,,,for (String str : arr), {
,,,,,Integer num =, map.get (str);
,,,,,map.put (str, num ==, null ?, 1,:, num +, 1);
,,,}
,,,Set Set =, map.entrySet ();
,,,Iterator it =, set.iterator ();
,,,System.out.println(“- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -产生绯闻;);
,,,System.out.println(“方法一,:“);
,,,while (it.hasNext ()), {
,,,,,Map.Entry<字符串,Integer>, entry =,(字符串,Map.Entry), it.next ();
,,,,,System.out.println(“单词,“,+,entry.getKey(), +,“,出现次数,:,“,+,entry.getValue ());
,,,}
,,,System.out.println(“- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -产生绯闻;);
,,,System.out.println(“方法二,:“);
,,,Iterator it01 =, map.keySet () .iterator ();
,,,while (it01.hasNext ()), {
,,,,,Object key =, it01.next ();
,,,,,System.out.println(“单词,“,+,key +,“,出现次数,:,“,+,map.get(关键));
,,,}
,,}
} 请输入,:
AAA BBB CCC DDD DDD AAA
时间:inputStr AAA BBB CCC DDD DDD AAA
---------------------------------------------
AAA BBB CCC DDD DDD AAA
(BBB, AAA,还以为,CCC, DDD,, DDD,, AAA)
6
---------------------------------------------
方法一,:
单词,AAA 出现次数,:2
单词,CCC 出现次数,:1
单词,BBB 出现次数,:1
单词,DDD 出现次数,:2
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本篇文章给大家分享的是有关Java项目中如何将键盘输入事件保存到txt文件,小编觉得挺实用的,因此分享给大家学习,希望大家阅读完这篇文章后可以有所收获,话不多说,跟着小编一起来看看吧。
具体如下:
输出:
