file.delete() in java cannot delete files

1. Problem

file.delete() cannot delete the file. file.delete() cannot delete the file. The result is false no matter how many times it is executed.

2. Analysis of the reasons

(1) There may be a stream operating on the file, or the stream operation is not closed after the stream operation is completed;

(2) It is possible that an external process or program is occupying the file.

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3. Solution

Method 1: If it can be checked If the above problem occurs, close the relevant stream or process, and the problem will naturally be solved.

Method 2: (Ultimate method!) Directly pass new File ("absolute path of the file"); then execute file.delete() to successfully delete.

The specific examples are as follows:

File file = new File（"D:/a.jpg"）;      
file.delete();         //返回结果就是true

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