Java.io.StreamTokenizer.toString() Method

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Description

The java.io.StreamTokenizer.toString() method returns the string representation of the current stream token and the line number it occurs on.

Declaration

Following is the declaration for java.io.StreamTokenizer.toString() method.

public String toString()

Parameters

NA

Return Value

This method returns a string representation of the token.

Exception

NA

Example

The following example shows the usage of java.io.StreamTokenizer.toString() method.

package com.tutorialspoint;

import java.io.*;

public class StreamTokenizerDemo {
   public static void main(String[] args) {
      String text = "Hello. This is a text \n that will be split "
         + "into tokens. 1 + 1 = 2";
         
      try {
         // create a new file with an ObjectOutputStream
         FileOutputStream out = new FileOutputStream("test.txt");
         ObjectOutputStream oout = new ObjectOutputStream(out);

         // write something in the file
         oout.writeUTF(text);
         oout.flush();

         // create an ObjectInputStream for the file we created before
         ObjectInputStream ois = new ObjectInputStream(new FileInputStream("test.txt"));

         // create a new tokenizer
         Reader r = new BufferedReader(new InputStreamReader(ois));
         StreamTokenizer st = new StreamTokenizer(r);

         // print the stream tokens
         boolean eof = false;
         
         do {
            int token = st.nextToken();

            switch (token) {
               case StreamTokenizer.TT_EOF:
                  System.out.println("End of File encountered.");
                  eof = true;
                  break;
                  
               case StreamTokenizer.TT_EOL:
                  System.out.println("End of Line encountered.");
                  break;
                  
               case StreamTokenizer.TT_WORD:
                  System.out.println("Word: " + st.toString());
                  break;
                  
               case StreamTokenizer.TT_NUMBER:
                  System.out.println("Number: " + st.nval);
                  break;
                  
               default:
                  System.out.println((char) token + " encountered.");
                  
                  if (token == '!') {
                     eof = true;
                  }
            }
         } while (!eof);

      } catch (Exception ex) {
         ex.printStackTrace();
      }
   }
}

Let us compile and run the above program, this will produce the following result −

Word: Token[AHello.], line 1
Word: Token[This], line 1
Word: Token[is], line 1
Word: Token[a], line 1
Word: Token[text], line 1
Word: Token[that], line 2
Word: Token[will], line 2
Word: Token[be], line 2
Word: Token[split], line 2
Word: Token[into], line 2
Word: Token[tokens.], line 2
Number: 1.0
+ encountered.
Number: 1.0
= encountered.
Number: 2.0
End of File encountered.