Question

我想在Java目录中移动，但我不知道它的名字？ Java是否提供了这样做的任何功能？

File srcFile = "C:/Entertainment/XXXXXXX/break.avi"

我确信娱乐中只有一个目录，但我不知道它的名字。如何在XXXXXXX目录中移动以访问其中的任何文件？

任何帮助？

Answer 1

尝试，

File file = new File("C:/Entertainment");
File[] files = file.listFiles();

Answer 2

File srcDir = new File("C:/Entertainment/");
File srcFile = null;
for (File dirMember : srcDir.listFiles()) {
    if (!dirMember.isDirectory()) {
        continue; // we don't need regular files
    }
    if (dirMember.getName().equals(".")) {
        continue; // we don't need this directory
    }
    if (dirMember.getName().equals("..")) {
        continue; // we don't need the parent directory
    }
    // This is the one you need.
    srcFile = new File(new File(srcDir, dirMember.getName()), "break.avi");
}

您还可以使用FileFilter，例如来自Commons IO

的FileFilter

File dir = new File("C:/Entertainment/");
File[] files = dir.listFiles( DirectoryFileFilter.INSTANCE ); // returns all subdirs
srcFile = new File(files[0], "break.avi");

Answer 3

File srcFile = new File("C:\\Entertainment");
srcFile = new File(srcFile, srcFile.list()[0]);
srcFile = newFile(srcFile, "break.avi");
System.out.println(srcFile.getPath());

Answer 4

    File outer= new File("C:/test");
    File inner = outer.listFiles()[0];//if you are sure there is one
    File[] listOfFilesInInnerMost = inner.listFiles();
    System.out.println("Files: " + Arrays.asList(listOfFilesInInnerMost));

将打印

文件：[C：\ test \ something \ text（2）.txt，C：\ test \ something \ text（3）.txt，C：\ test \ something \ text.txt]

在不知道其名称的情况下移动到特定目录中

4 个答案: