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Java.io.StreamTokenizer slashSlashComments() Method
Description
The java.io.StreamTokenizer.slashSlashComments(boolean flag) method determines whether or not the tokenizer recognizes C++-style comments. If the flag argument is true, this stream tokenizer recognizes C++-style comments. Any occurrence of two consecutive slash characters ('/') is treated as the beginning of a comment that extends to the end of the line. If the flag argument is false, then C++-style comments are not treated specially.
Declaration
Following is the declaration for java.io.StreamTokenizer.slashSlashComments() method.
public void slashSlashComments(boolean flag)
Parameters
flag − true indicates to recognize and ignore C++-style comments.
Return Value
This method does not return a value.
Exception
NA
Example
The following example shows the usage of java.io.StreamTokenizer.slashSlashComments() 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); // set slash-slash comments as recognizable st.slashSlashComments(true); // 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.sval); 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: CHello. Word: This Word: is Word: a Word: text Word: that End of File encountered.