//讀取文件中的字符 package zhi_jie_liu;import java.io.*;public class Example08 {public static void main(String[] args) throws Exception {// TODO Auto-generated method stub//創建一個FileReader對象來讀取文件中的字符FileReader reader=new FileReader("C:\\Users\\Administrator\\Desktop\\java\\a.txt"); int ch;//定義一個變量用于記錄讀取的字符 while ((ch=reader.read())!=-1) {System.out.println((char) ch);}reader.close();}}

//將字符寫入文件 package zhi_jie_liu;import java.io.*;public class Example09 {public static void main(String[] args) throws Exception {// TODO Auto-generated method stubFileWriter writer=new FileWriter("C:\\Users\\Administrator\\Desktop\\java\\writer.txt");String str="你好";writer.write(str);//將字符數據寫入到文本文件中writer.write("\r\n");//將輸出語句換行writer.close();//關閉你寫入流釋放資源}}//字符緩沖流 package zhi_jie_liu;import java.io.*;public class Example10 {public static void main(String[] args) throws Exception {// TODO Auto-generated method stubFileReader reader=new FileReader("C:\\Users\\Administrator\\Desktop\\java\\a.txt");BufferedReader br=new BufferedReader(reader);FileWriter writer=new FileWriter("C:\\Users\\Administrator\\Desktop\\java\\writer.txt",true );BufferedWriter bW=new BufferedWriter(writer);String str;while((str=br.readLine())!=null){ //沒次讀取一行文本，判斷是否到文件末尾bW.write(str);bW.newLine();//寫入一個換行符}br.close();bW.close();}}//拷貝時加上行號 package zhi_jie_liu;import java.io.*; public class Example11 {public static void main(String[] args) throws Exception {// TODO Auto-generated method stubFileReader fr=new FileReader("C:\\Users\\Administrator\\Desktop\\java\\a.txt");FileWriter fw=new FileWriter("C:\\Users\\Administrator\\Desktop\\java\\writer.txt",true );LineNumberReader lr=new LineNumberReader(fr);//包裝lr.setLineNumber(0);String line=null;while ((line=lr.readLine())!=null) {fw.write(lr.getLineNumber()+":"+line);fw.write("\r\n");}lr.close();fw.close();}}
//轉換流 package zhi_jie_liu;import java.io.*;public class Example12 {public static void main(String[] args) throws Exception {// TODO Auto-generated method stubFileInputStream in=new FileInputStream("C:\\Users\\Administrator\\Desktop\\java\\a.txt");InputStreamReader isr=new InputStreamReader(in);BufferedReader br= new BufferedReader(isr);//對字符流進行包裝FileOutputStream out=new FileOutputStream("C:\\Users\\Administrator\\Desktop\\java\\writer.txt",true );OutputStreamWriter osw=new OutputStreamWriter(out);BufferedWriter bw=new BufferedWriter(osw);//對字符輸出流進行包裝String line;while((line=br.readLine())!=null){bw.write(line);}br.close();bw.close();}}

總結

以上是生活随笔為你收集整理的java IO(输入输出) 字符流的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。