Overview of buffered streams

• Buffered streams are input and output streams with buffers
• Buffered streams can significantly reduce our access to IO and protect hard disk!
• The buffer flow itself is the processing flow (wrapped flow), so the buffer flow must be attached to the node flow (original flow)
• The processing flow is the flow wrapped on the original node, which is equivalent to A pipe wrapped on a pipe

Create a character streamReadFile object:

BufferedReader br = new BufferedReader(< span style="color: #0000ff;">new FileReader("readme.txt"));

Create a character streamWrite file object:

BufferedWriter bw = new BufferedWriter(new FileWriter("dest.txt"));

Use while loop to read and write data:

char[] chs = new char[2048];

int len;

while((len = br.read(chs)) != -1) {

bw.write(chs);

}
bw.flush();//Remember to refresh the buffer stream

Close the resource:
< /span>

br.close();

bw.close();

Of course, it is also possible to copy files with a buffer stream, which is very efficient!

BufferedReader br = new BufferedReader(new< /span> FileReader("readme.txt"));

BufferedWriter bw = new BufferedWriter(< span style="color: #0000ff;">new FileWriter("dest.txt"));

char[] chs = new char[2048];

int len;

while((len = br.read(chs)) != -1) {

bw.write(chs);

}
bw.flush();//Remember to refresh the buffer stream

 br.close();

bw.close();