//字节流的缓冲区 输入类似
//字节流的缓冲区 输入类似
public class BufferedOutputStreamDemo {
public static void main(String[] args) throws IOException {
BufferedOutputStream bos=new
BufferedOutputStream(new FileOutputStream("E://java//a.txt"));
bos.write(55);
byte[] bytes="helloworld".getBytes();
bos.write(bytes);
bos.write(bytes,0,3);
bos.close();
}
}
//字符流的缓冲区
public class TxtWriter {
public static void main(String[] args) throws IOException{
FileWriter fw=new FileWriter("E:\\java\\a.txt");
BufferedWriter bfw=new BufferedWriter(fw);
bfw.write("你好".toCharArray()); //字符串编程字符数组
bfw.flush();
bfw.newLine(); // 换行符 建议使用 而不是\n\r
bfw.write("你好".toCharArray()); //字符串编程字符数组
bfw.flush();
bfw.write("你好".toCharArray()); //字符串编程字符数组
bfw.flush();
bfw.close();
}
}
public class TxtWriter {
public static void main(String[] args) throws IOException{
BufferedReader bfr=new BufferedReader(new FileReader("E:\\java\\a.txt"));
String len=null;
while((len=bfr.readLine())!=null) {
System.out.println(len);
}
/*while((len=bfr.readLine())!=null) {
System.out.print(len);
当println变为print时输出没有换行，因为readLine()只返回有效字符
}*/
bfr.close();
}
}
缓冲流复制
public class Copy {
public static void main(String[] args) throws IOException{
BufferedReader bfr=new BufferedReader(new FileReader("E:\\java\\a.txt"));
BufferedWriter bfw=new BufferedWriter(new FileWriter("E:\\a.txt"));
//读一行，写一行，写换行
String len = null;
while((len=bfr.readLine())!=null) {
bfw.write(len);
bfw.newLine();
bfw.flush();
}
bfw.close();
bfr.close();
}
}