Question

我有多个看起来像这样的文件：

aaa bob ccc
;; ;; hh
did shhh ffff
sds dfd fgf
ff
aaa dd

我只想从每一行中取第二个单词。

这是我的Python代码。我希望在Java中也一样。请帮忙！

fin=open(path+'/'+item);
 content= fin.readlines();
 fin.close();
 for line in content:
     if ('*' in line) ==1 | ('#' in line==1) | (',' in line==1)|(';' in line==1) : 
#it would be better if I could check for existence of characters alone!
        continue;
     else:
   x=line.split();
   foutput.write("\n".join(x))

我这样做了：但是新文件是空的，我得到了例外：

java.io.FileNotFoundException: Too many open files open

这是我的Java代码片段：

File folder = new File(path);
File[] listOfFiles = folder.listFiles();
System.out.println(listOfFiles.length);

List<String> filenames= new ArrayList<String>();

for (File file : listOfFiles) {
    if (file.isFile() ) {
        filenames.add(file.getName());          
    }
}

String path1,path2;
for (String s : filenames) {

path1 = path+"/"+s;
path2=old_path+"/fullfile.txt";
File file = new File(path1);
System.out.println(file.getName());

try {
    Scanner sc = new Scanner(file);
    while (sc.hasNextLine()) {
        String i = sc.nextLine();
        try {
            BufferedWriter writer = new BufferedWriter(new FileWriter(path2)); 
            writer.write(i); 
        }
        catch(Exception e) {
            System.out.println(e);
        }
    }
    sc.close();
} 
catch (FileNotFoundException e) {
    e.printStackTrace();
}

我不确定如何在这里提取第二个单词。在Python中我通过检查空格来做到这一点，但我在这里一无所知！

Java：逐行处理文件

0 个答案: