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Home/ Questions/Q 7984255
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Editorial Team
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Editorial Team
Asked: June 4, 20262026-06-04T11:12:35+00:00 2026-06-04T11:12:35+00:00

How do I find out why java.io.File.mkdir() returns false . I can create the

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How do I find out why java.io.File.mkdir() returns false.
I can create the directory manually.

UPDATE:
My code looks like this:

String directoryName = "C:/some/path/";
File directory= new File(directoryName );
if (!directory.exists() && !directory.mkdir()) {
    throw new RuntimeException("Failed to create directory: " + directoryName);
}
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  1. Editorial Team
    Editorial Team
    2026-06-04T11:12:36+00:00Added an answer on June 4, 2026 at 11:12 am

    You will need to use mkdirs() if the parent folder (some in your example) doesn’t already exist.

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