I want extract single line and multi line comments

package javaapplication5;


import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * BufferedReader and Scanner can be used to read line by line from any File or
 * console in Java.
 * This Java program demonstrate line by line reading using BufferedReader in Java
 *
 * @author Javin Paul
 */
public class BufferedReaderExample {   

    public static void main(String args[]) throws IOException{
      
        //reading file line by line in Java using BufferedReader       
        FileInputStream fis = null;
        BufferedReader br = null;
        //String line;
        try {
            fis = new FileInputStream("E:/Sum.txt");
            br = new BufferedReader(new InputStreamReader(fis));
            String line;
            while((line = br.readLine()) != null){
                if(line.contains("/*") || line.contains("*/")|| line.contains("//")){
                    
                    System.out.println(line);
                    
                }
                
                else
                   
                    System.out.println("");
                
            }
            br.close();
          
            
  }
        catch(IOException e){
            System.out.println("file could not read");
            
        }
    }
}