我收到 java.io.IOException：文件名、目录名或卷标语法不正确，我不明白为什么。
如果我直接使用字符串尝试我的代码，它可以工作（文件夹存在，权限正常等）当我尝试从数组构建字符串时，它会失败并出现上述异常。这是代码，我尝试过失败的注释行，以及什么是有效的以及 println 输出是什么：
// //////////////////////////////////////////////////////////////////
// Create a file chooser and select a directory
JFileChooser fc = new JFileChooser();
fc.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
fc.setAcceptAllFileFilterUsed(false);
int rVal = fc.showOpenDialog(MyApp.this);
if (rVal == JFileChooser.APPROVE_OPTION) {
dlDirectory = fc.getSelectedFile().toString() + "\\";
System.out.println("Selected Directory: " + dlDirectory);
} else {
System.out.println("No Selection");
}
...
...(I create a string array of file names here)
...
for (int i = 0; i < filesToRetrieve.length; i++) {
//put together the directory and file name
String dlFileName = (dlDirectory + filesToRetrieve[i]);
try {
System.out.println(dlDirectory); // output: C:\Users\michael\Documents\tmp\ (as expected)
System.out.println(filesToRetrieve[i]); // output: nameoffile.txt (as expected)
System.out.println(dlFileName); // output: C:\Users\michael\Documents\tmp\nameoffile.txt (as expected)
File myFile = new File(dlFileName); //<--this does not work -- java.io.IOException: The filename, directory name, or volume label syntax is incorrect
//File myFile = new File(dlDirectory + filesToRetrieve[i]); //<--this does not work either
//File myFile = new File(dlDirectory + "nameoffile.txt"); // <--this does work !?!?
if(!myFile.exists()) {
System.out.println("file does not exist");
myFile.createNewFile();
}
} catch (Exception e) {
System.err
.println("failed");
System.err.println(e);
}
}
谁能明白为什么会这样？谢谢。