The "in" Java Stream Classic

Stream
Import java.io.*;

public class Newiodemo {public static void main (string[] args) { try {   //1. Reading input by Lines:   bufferedreader in =   new BufferedReader (    New FileReader (Args[0]);    string s, s2 = new String ();    while ((s = in.readline ())!= NULL)    S2 = = s + "\ n";    in.close ();     //1b. Reading Standard Input:   bufferedreader stdin =    new BufferedReader (      new InputStreamReader (system.in));    system.out.print ("Enter a Line:");    system.out.println (Stdin.readline ());       //2. Input from Memory   stringreader in2 = new StringReader (s2);    int c;    while ((c = in2.read ())!=-1)     system.out.print ((char) c);       //3. Formatted MEMOry input   try {     datainputstream in3 =      New DataInputStream (     //oops:must use deprecated class:      New StringBufferInputStream (S2));      while (True)        System.out.print ((char) in3.readbyte ());   &nbsp} catch (Eofexception e) {       system.out.println ("End of Stream");    }      //4. Line Numbering & file Output   try {     linenumberreader Li =       new LineNumberReader (       new StringReader (s2 );      bufferedreader in4 =      new BufferedReader (LI);      printwriter out1 =      new PrintWriter (        new BufferedWriter (        new FileWriter ("Iodemo.out"));      while ((s = in4.readline ())!= null)      out1.println (        "line" + li.getlinenumber () + s);      out1.close ();   &NBSP} catch (Eofexception e) {     system.out.println ("End of Stream");    }      //5. Storing & recovering data   try {     dataoutputstream Out2 =      new DataOutputStream (       new BufferedOutputStream (          new FileOutputStream ("Data.txt"));      out2.writedouble (3.14159);      out2.writebytes ("That is PI");      out2.close ();  &Nbsp;   datainputstream in5 =     new DataInputStream (       new Bufferedinputstream (       new FileInputStream (" Data.txt "));      bufferedreader in5br =       new BufferedReader (         new inputstreamreader (in5));      //must use DataInputStream for DATA:     SYSTEM.OUT.PRINTLN ( In5.readdouble ())      //Can now use the "proper" readLine ():      system.out.println (In5br.readline ());   &nbsp} catch (Eofexception e) {      system.out.println ("End of Stream");    }      //6. Reading and writing random access   //files are the same as before.   //(not repeated here)      &NBSP} catch (FileNotFoundException e) {     system.out.println (       "File not Found: + args[1]);   &nbsp} catch (IOException e) {      system.out.println ("IO Exception");    }&nbsp}}///:~