去掉代码中的注释和空白行

import java.io.BufferedReader;

import java.io.FileNotFoundException;

import java.io.FileReader;

import java.io.IOException;

import java.util.function.Predicate;

import java.util.stream.Stream;



/**

 * 从文本中读取脚本代码，去掉注释("#") 和空白行

 * 

 * @author Felix

 *

 */

public class StreamFilterDemo1 {



    public static void main(String[] args) {

    Predicate<String> notCommentOrEmptyLine = (line) -> line.trim().length() > 0 && !line.trim().startsWith("#");

    try (FileReader fr = new FileReader("src/example.txt"); BufferedReader br = new BufferedReader(fr)) {

        Stream<String> lines = br.lines();

        lines.filter(notCommentOrEmptyLine).forEach(System.out::println);

    } catch (FileNotFoundException e) {

        e.printStackTrace();

    } catch (IOException e) {

        e.printStackTrace();

    }

    }



}

example.txt文件中的内容：

# Set path so it includes user's private bin if it exists

if [ -d "$HOME/bin" ] ; then

    PATH="$HOME/bin:$PATH"



fi