java.io.StreamTokenizer.slashSlashComments(boolean flag) 方法确定是否标记生成器识别C++风格的注释。如果flag参数为true，则此流标记者认识的C++风格的注释。两个连续的斜杠字符('/')发生任何被视为注释，一直延伸到该行的结束的开始。如果flag参数为false，那么C++风格的注释不会得到特殊对待。

声明

以下是java.io.StreamTokenizer.slashSlashComments()方法的声明

public void slashSlashComments(boolean flag)

参数

• flag -- true表示以识别和忽略C++风格的注释。

返回值

这个方法没有返回值

异常

• NA

例子

下面的例子显示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();
      }
   }
}

让我们编译和运行上面的程序，这将产生以下结果：

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