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This article mainly introduces "how to use Java character buffer stream". In daily operation, I believe many people have doubts about how to use Java character buffer stream. The editor consulted all kinds of data and sorted out simple and easy-to-use operation methods. I hope it will be helpful to answer the questions of "how to use Java character buffer stream". Next, please follow the editor to study!

I. character buffer stream

BufferedWriter: text writes to character output streams, buffering characters to provide efficient writing of individual characters, arrays, and strings. You can specify the buffer size, or you can accept the default size. The default value is large enough to be used for most purposes.

Construction method:

BufferedWriter (Writer out) creates a buffered character output stream that uses the default size output buffer.

BufferedWriter (Writer out, int sz) creates a new buffered character output stream, using an output buffer of a given size.

BufferedReader: reads text from a character input stream and buffers characters to provide efficient reading of characters, arrays, and lines. You can specify the buffer size, or you can use the default size. The default value is large enough to be used for most purposes.

Construction method:

BufferedReader (Reader in) creates a buffered character input stream that uses the default input buffer size.

BufferedReader (Reader in, int sz) creates a buffered character input stream that uses an input buffer of the specified size.

The way the character buffer stream reads data:

Int read (): read one character data at a time

Int read (char [] cbuf): read character array data one at a time

Int read (char cbuf [], int off, int len): read part of the data in a character array at a time

String readLine (): read a line of text. The result is a character that contains the contents of the line, without any line termination characters, or null if the end of the stream has been reached

The way the character buffer stream writes data:

Void write (int c): write a character

Void write (char [] cbuf): writes an array of characters

Void write (char [] cbuf,int off,int len): write part of an array of characters

Void write (String str): write a string

Void write (String str,int off,int len): write part of a string

Void newLine (): writes a line delimiter string defined by the system property

Example-character buffer stream implementation to copy Java files:

Public class BufferedWriteReaderDemo {public static void main (String [] args) throws IOException {/ / use character buffer stream to copy a file / / use subclass FileWrite\ FileReader instead of OutputStreamWrite\ InputStreamReader BufferedReader br=new BufferedReader (new FileReader ("E:\\ abc.txt"); BufferedWriter bw=new BufferedWriter (new FileWriter ("F:\\ abcdef.txt")); / / read data / / int len / / while ((len=br.read ())! =-1) {/ / bw.write (len); / /} int len; char [] ch=new char [1024]; while ((len=br.read (ch))! =-1) {bw.write (ch);} / release resource br.close (); bw.close () 2. Special method of character buffer stream

BufferedWriter:

Void newLine (): writes a line delimiter string defined by the system property

BufferedReader:

Public String readLine (): read a line of text. The result is a string containing the contents of the line, excluding any line termination characters; if the end of the stream has reached, the value is null

Example-character buffer stream specific method to copy Java files:

Public class Demo02 {public static void main (String [] args) throws IOException {/ / character buffer stream specific method to copy Java files BufferedReader br=new BufferedReader ("E:\\ abc.txt"); BufferedWriter bw=new BufferedWriter (new FileWriter ("F:\\ aaa.txt")); / / read and write data String line While ((line=br.readLine ())! = null) {bw.write (line); bw.newLine (); / / Line wrapping bw.flush (); / / Refresh cache} / / release resource br.close (); bw.close ();}}

Character stream can only copy text data, there are five ways, generally using the unique function of character buffer stream

At this point, the study on "how to use the Java character buffer stream" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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