Question

我正在尝试将以下Java8片段转换为Java7：

Files.walk(Paths.get(modifiedPathName))
 .filter(Files::isRegularFile)
 .forEach(path -> {
   mutatedFileStorage.add((T) application.readFromFile(path));
  });

我尝试了以下内容：

Iterator<Path> it = Files.walkFileTree(Paths.get(modifiedPathName)).iterator();
Path path = null;
while(it.hasNext()) {
    path = it.next();
    if(Files.isRegularFile(path)) {
            mutatedFileStorage.add((T) application.readFromFile(path));
    }
}

问题是，我一直收到错误：

error: no suitable method found for walkFileTree(Path)
        Iterator<Path> it = Files.walkFileTree(Paths.get(modifiedPathName)).iterator();

我不知道如何将Files.walk转换为Java7，这是我最好的尝试？我可以对我的Java7代码进行一些小修改来修复它吗？或者我是否必须完全做其他事情？

Answer 1

我认为你想要使用Files.walkFileTree：

final Collection<T> finalMutatedFileStorage = mutatedFileStorage;
final Application finalApplication = application; // guessing at the type here
Files.walkFileTree(Paths.get(modifiedPathName), new SimpleFileVisitor<Path>() {
  @Override
  public FileVisitResult visitFile(Path file, BasicFileAttributes attrs)
  throws IOException {
    if (attrs.isRegularFile()) {
       finalMutatedFileStorage.add((T) finalApplication.readFromFile(file));
    }
    return FileVisitResult.CONTINUE;
  }
});

Java8 - ＆gt; Java7转换File.walk

1 个答案: