"Java" reads the contents of a file in a variety of ways, including reading the contents of the file by byte, character, and by unit of behavior __java

Main function: Read the contents of the file in various ways
* <p> includes reading file contents by byte, reading file contents by character, and reading file contents by rows.
* <ul>
* <li> read files in bytes, often used to read binary files, such as pictures, sounds, images, and other files.
* <li> reads files in characters, often used to read text, numbers, and other types of files. To get the standard input byte stream,
* then convert to character stream through bridging, and then buffer to the standard input flow with buffering.

* <li> read files in behavior units, often used to read line-oriented format files.

Package Com.zf.s10.io;
Import Java.io.BufferedReader;
Import Java.io.File;
Import Java.io.FileInputStream;
Import Java.io.FileReader;
Import java.io.IOException;
Import Java.io.InputStream;
Import Java.io.InputStreamReader;

Import Java.io.Reader;
 /** * @ filename Textreadfile.java * @ Feature reads file contents in various ways * <p> includes reading file contents by byte, reading file contents by character, reading file contents by line.
 * <ul> * <li> read files in bytes, often used to read binary files, such as pictures, sounds, images, and other files. * <li> reads files in characters, often used to read text, numbers, and other types of files.
 To get the standard input byte stream, the * is then converted to character streams via bridging and then buffered for standard input streams with buffering.
 * <li> read files in behavior units, often used to read line-oriented format files.
	 * </ul> * </p> * @ author * @ Date 2010-4-28 * @ Version M1.0 * Description Java Tools class/public class Textreadfile {/**
	 * Read files in bytes, often used to read binary files, such as pictures, sounds, images, and other files. * * @param filename File Absolute path */public static void Readfilebybytes (String filename) {File File = new file (fileName)
		;//Create file InputStream in = null;
			try {System.out.println ("①. Read the contents of the file in bytes, one byte at a time:");
			in = new FileInputStream (file);//Put files into the file input stream int tempbyte; while (tempbyte = In.read ())!=-1 {//read one byte at a time, loop the content read out System.out.write (tempbyte);
			In.close ();//close file input stream} catch (IOException e) {//catch exception e.printstacktrace ();
		Return
			try {System.out.println ("②. Read the contents of the file in bytes, read multiple bytes at a time:");
			Read multiple bytes at a time byte[] tempbytes = new byte[100];//declares a byte array of length 100 int byteread = 0; in = new FileInputStream (filename);//Put the file into the file input stream textreadfile.showavailablebytes (in);///Display the number of bytes left in the input stream/read multiple bytes to byte Array, byteread the number of bytes read in a while ((Byteread = In.read (tempbytes))!=-1) {//Read multiple bytes at a time, looping content read System.out.write (tempbytes
			, 0, Byteread);
		} catch (Exception E1) {//catch exception e1.printstacktrace (); finally {//content total execution if (in!= null) {try {in.close ();//ensure file input stream closes} catch (IOException E1) {E1.pri
				Ntstacktrace ();
	 /** * Reads files in characters, often used to read text, numbers, and other types of files. * * @param filename File Absolute path */public static void Readfilebychars (String filename) {File File = new file (fileName) ;//Create file Reader read = Null
			try {System.out.println ("①. Read the contents of the file in characters, one byte at a time:");
			Read one character at a time = new InputStreamReader (new FileInputStream (file));
			int Tempchar;
				while ((Tempchar = Read.read ())!=-1) {//For Windows, the RN two characters together denote a newline.
				However, if the two characters are displayed separately, the lines will be changed two times. So, shielding off R, or shielding N.
				Otherwise, there will be a lot more empty lines.
				if ((char) tempchar)!= ' R ') {//Read the System.out.print ((char) Tempchar) as long as the line is not wrapped;
		} read.close ();
		catch (Exception e) {e.printstacktrace ();

			try {System.out.println ("②. Read the contents of the file in characters, read multiple bytes at a time:");
			char[] Tempchars = new CHAR[30];
			int charread = 0; Read = new InputStreamReader (new FileInputStream (FileName))//create file read stream while (Charread = Read.read (tempchars))!=-1) {//Once read multiple characters//also shield off R does not show if ((Charread = tempchars.length) && (tempchars[tempchars.length-1]!= '
				R ')) {System.out.print (tempchars); else {for (int i = 0; i < Charread i++) {if (tempchars[i] = = ' R ') {continue;//stops executing the current iteration and then returns the loopAt the beginning} else {System.out.print (tempchars[i]);
		catch (Exception E1) {//catch exception e1.printstacktrace ();
		finally {//content total execution if (read!= null) {try {read.close ();/Ensure Close} catch (IOException e1) {}}
	 }/** * Reads files in a behavior unit and is often used to read line-oriented format files. * * @param filename File Absolute path */public static void Readfilebylines (String filename) {File File = new file (fileName)
		;
			BufferedReader reader = null;//Create cache read try {System.out.println ("①." Read the contents of the file in the behavior unit, read one whole line at a time: ");
			reader = new BufferedReader (new FileReader (file))//place file in cache read String tempstring = null;
			int line = 1;  Read one row at a time until you read null for file end while ((tempstring = Reader.readline ())!= null) {//Show line number System.out.println ("lines" +
				Line + ":" + tempstring);
			line++;
		} reader.close ();
		catch (IOException e) {//catch exception e.printstacktrace (); finally {//content total execution if (reader!= null) {try {reader.close ();/close Cache read} catch (ioexceptIon E1) {}}}/** * Displays the number of bytes left in the input stream * * @param in */private static void Showavailablebytes (in
		Putstream in) {try {System.out.println (the number of bytes in the current byte input stream is: + in.available ());
		catch (IOException e) {//catch exception e.printstacktrace ();
		} public static void Main (string[] args) {String fileName = ' e:/poem.txt ';
		System.out.println ("1. Read files in bytes:");
		Readfilebybytes (FileName);
		System.out.println ("2. read files by character:");
		Readfilebychars (FileName);
		System.out.println ("3. Read file by unit of conduct:");
	Readfilebylines (FileName);
 }
	
}