Java FileReader Read File __java

Import java.io.*;

Class  Filereaderdemo
{public
	static void Main (string[] args) throws IOException
	{
		//create a file read stream object , associated with a file with the specified name.
		//To ensure that the file is already present, if it does not exist, an exception

will occur FileNotFoundException
		FileReader fr = new FileReader ("Demo.txt");

		Invokes the Read method that reads the stream object.
		//read (): read one character at a time. And it will read down automatically.
		
		int ch = 0;

		while ((Ch=fr.read ())!=-1)
		{
			System.out.println ((char) ch);
		}
		/* While
		(true)
		{
			int ch = fr.read ();
			if (ch==-1) break
				;
			System.out.println ("ch=" + (char) ch);
		}
		*
		/Fr.close ();
	}

The second way: read by a character array.

Import java.io.*;

Class FileReaderDemo2 
{public
	static void Main (string[] args) throws IOException
	{
		FileReader fr = new F Ilereader ("Demo.txt");		

		Defines an array of characters. Used to store read-to characters.
		//This read (char[]) returns the number of characters read.
		char[] buf = new char[1024];

		int num = 0;
		while ((Num=fr.read (BUF))!=-1)
		{
			System.out.println (new String (Buf,0,num));
		Fr.close ();
	}

———— from "Bi Xiangdong 25 Days"