java.io.StreamTokenizer.slashSlashComments(boolean flag) 方法確定是否標(biāo)記生成器識(shí)別C++風(fēng)格的注釋。如果flag參數(shù)為true，則此流標(biāo)記者認(rèn)識(shí)的C++風(fēng)格的注釋。兩個(gè)連續(xù)的斜杠字符('/')發(fā)生任何被視為注釋，一直延伸到該行的結(jié)束的開始。如果flag參數(shù)為false，那么C++風(fēng)格的注釋不會(huì)得到特殊對(duì)待。

聲明

以下是java.io.StreamTokenizer.slashSlashComments()方法的聲明

public void slashSlashComments(boolean flag)

參數(shù)

flag -- true表示以識(shí)別和忽略C++風(fēng)格的注釋。

返回值

這個(gè)方法沒有返回值

異常

例子

下面的例子顯示java.io.StreamTokenizer.slashSlashComments()方法的用法。

package com.yiibai;

import java.io.*;

public class StreamTokenizerDemo {
   
   public static void main(String[] args) {
      
      String text = "Hello. This is a text 
 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();
      }
   }
}

讓我們編譯和運(yùn)行上面的程序，這將產(chǎn)生以下結(jié)果：

Word: Hello.
Word: This
Word: is
Word: a
Word: text
Word: that
End of File encountered.

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