java正则删除所有空格 java正则空行

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;


public class CountCode {
    static int nomalCount = 0;//代码行
    static int commonCount = 0;//注释行
    static int whiteCount = 0;//空白行
    public static void main(String[] args) {
        File f = new File("D:\\testjava");
        File[] files = f.listFiles();
        for(int i=0;i<files.length;i++){
            File ff = files[i];
            System.out.println(ff.getName());
            if(ff.getName().matches(".*\\.java$")){
                System.out.println("000000");
                
                parse(ff);
            }
        }
        System.out.println("nomoalCount="+nomalCount);
        System.out.println("commonCount="+commonCount);
        System.out.println("whiteCount="+whiteCount);
    }

    private static void parse(File f) {
        BufferedReader br = null;
        boolean flag = false;
        try {
            br = new BufferedReader(new FileReader(f));
            String line = "";
            while((line = br.readLine()) != null){
　　　　　　　　　　line = line.trim();
                if(line.matches("^[\\s&&[^\\n]]*$")){//空白行正则表达式
                    whiteCount++;
                }else if(line.startsWith("/*")&& !line.endsWith("*/")){
                    commonCount++;
                    flag = true;
                }else if(true == flag){
                    commonCount++;
                    if(line.endsWith("*/")){
                        System.out.println("sdfsd");
                        flag = false;
                    }
                }else{
                    nomalCount++;
                }
            }
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}