Java Create txt file and deposit content __java Learning

Import Java.io.BufferedReader;
Import Java.io.File;
Import Java.io.FileInputStream;
Import Java.io.FileOutputStream;
Import java.io.IOException;
Import Java.io.InputStreamReader;

Import Java.io.PrintWriter;
	public class Txtexport {private static String path = ' d:/';

	private static String filenametemp;
		public static void Main (string[] args) throws IOException {txtexport.creattxtfile ("Hello");
	Txtexport.writetxtfile ("Hello"); /** * Create File * * @throws IOException */public static Boolean Creattxtfile (String name) throws IOException
		{Boolean flag = false;
		filenametemp = path + name + ". txt";
		File filename = new file (filenametemp);
			if (!filename.exists ()) {filename.createnewfile ();
		Flag = true;
	return flag; /** * Write File * * @param newstr * NEW content * @throws IOException/public static Boolean Writetxtfile
		(String newstr) throws IOException {//Read the original file contents first, then write to Boolean flag = false;
	String Filein = newstr + "\ r \ n";	String temp = "";
		FileInputStream FIS = null;
		InputStreamReader ISR = null;

		BufferedReader br = null;
		FileOutputStream fos = null;
		PrintWriter pw = null;
			try {//filename path File File = new file (filenametemp);
			Reads the file into the input stream FIS = new FileInputStream (file);
			ISR = new InputStreamReader (FIS);
			br = new BufferedReader (ISR);

			StringBuffer buf = new StringBuffer (); Save the original contents of the file for (int j = 1; (temp = Br.readline ())!= null;
				J + +) {buf = Buf.append (temp); System.getproperty ("Line.separator")//the separator between line and line equals "\ n" buf = Buf.append (System.getproperty ("Line.separator")
			);

			} buf.append (Filein);
			FOS = new FileOutputStream (file);
			PW = new PrintWriter (FOS);
			Pw.write (Buf.tostring (). ToCharArray ());
			Pw.flush ();
		Flag = true;
		The catch (IOException E1) {//TODO automatically generates catch blocks throw E1;
			finally {if (PW!= null) {pw.close ();
			} if (fos!= null) {fos.close ();
			} if (br!= null) {br.close ();
	}		if (ISR!= null) {isr.close ();
			} if (FIS!= null) {fis.close ();
	} return flag;
 }

}