Java檔案輸入儲存，統計某個字串，統計所有字串，java字串

Java檔案輸入儲存，統計某個字串，統計所有字串，java字串

import java.io.*;import java.util.*;/** * Created by Admin on 2018/3/20. */public class FileSaveTest {    public static void main(String[] args) throws IOException {/*      //輸入並儲存        Scanner scanner=new Scanner(System.in);        String str=scanner.nextLine();  //輸入        File file=new File("1.txt");   //檔案        FileOutputStream fos;        //輸出資料流        fos= new FileOutputStream(file);        fos.write(str.getBytes());  //寫入        System.out.println("scccess");*//*     //從檔案中查出某字串出現的次數        BufferedReader br=new BufferedReader(new FileReader("1.txt"));        String result="";        String s;        while ((s=br.readLine())!=null){  //一次讀一行            result+=result+s+" ";        }        int count=0;        String[] str=result.split(" ");        for(int i=0;i<str.length;i++){             if(str[i].equals("if")) {                 count++;             }        }        System.out.println(count);*/        //統計各個字串出現的次數        BufferedReader br=new BufferedReader(new FileReader("1.txt"));        String result="";        String line;        while ((line=br.readLine())!=null){  //一次讀一行            result+=result+line+" ";        }        String[] str=result.split(" ");        Map<String,Integer> map=new HashMap<String,Integer>() ;        for(String s:str) map.put(s, map.get(s) == null ? 1 : map.get(s) + 1);        Iterator iterator=map.keySet().iterator();        while (iterator.hasNext()){            Object o=iterator.next();            System.out.println(o+":"+map.get(o));        }    }}