在不知道其名稱的情況下移動到特定目錄中

Question

我想移動到Java目錄中但我不知道它的名稱？ Java是否提供了這樣的功能？

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

我確定Entertainment中只有一個目錄，但我不知道它的名字。如何移動XXXXXXX目錄以訪問其中的任何文件？

任何幫助？

Answer 1

嘗試，

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

Answer 2

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

Answer 3

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"); 
} 

你也可以使用FileFilter，e.g一個從Commons IO

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

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)); 

將打印

文件：[C：\測試\東西\文本（2）。txt文件，C：\測試\東西\文本（3）。txt文件，C：\測試\東西\的text.txt]