Java如何讀寫txt檔案的代碼 l

來源:互聯網
上載者:User

有關Java如何讀寫txt檔案這個問題經常在面試時會被問到,不懂或不熟悉的同志們可是要記好了喲!先來看下具體實現吧!

  package common;

  import java.io.*;

  import java.util.ArrayList;

  public class IOTest {

  public static void main (String args[]) {

  ReadDate();

  WriteDate();

  }

  /**

  * 讀取資料

  */

  public static void ReadDate() {

  String url = “e:/2.txt”;

  try {

  FileReader read = new FileReader(new File(url));

  StringBuffer sb = new StringBuffer();

  char ch[] = new char[1024];

  int d = read.read(ch);

  while(d!=-1){

  String str = new String(ch,0,d);

  sb.append(str);

  d = read.read(ch);

  }

  System.out.print(sb.toString());

  } catch (FileNotFoundException e) {

  e.printStackTrace();

  } catch (IOException e) {

  e.printStackTrace();

  }

  }

  /**

  * 寫入資料

  */

  public static void WriteDate() {

  try{

  File file = new File(“D:/abc.txt”);

  if (file.exists()) {

  file.delete();

  }

  file.createNewFile();

  BufferedWriter output = new BufferedWriter(new FileWriter(file));

  ArrayList ResolveList = new ArrayList();

  for (int i = 0; i < 10; i++) {

  ResolveList.add(Math.random()* 100);

  }

  for (int i=0 ;i

  output.write(String.valueOf(ResolveList.get(i)) + “\n”);

  }

  output.close();

  } catch (Exception ex) {

  System.out.println(ex);

  }

  }

  }

原文出自【位元網】,轉載請保留原文連結:http://soft.chinabyte.com/database/303/12439303.shtml

聯繫我們

該頁面正文內容均來源於網絡整理,並不代表阿里雲官方的觀點,該頁面所提到的產品和服務也與阿里云無關,如果該頁面內容對您造成了困擾,歡迎寫郵件給我們,收到郵件我們將在5個工作日內處理。

如果您發現本社區中有涉嫌抄襲的內容,歡迎發送郵件至: info-contact@alibabacloud.com 進行舉報並提供相關證據,工作人員會在 5 個工作天內聯絡您,一經查實,本站將立刻刪除涉嫌侵權內容。

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.