io

Test if a file is an image file

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This works pretty well for me. Hope I could help import javax.activation.MimetypesFileTypeMap; import java.io.File; class Untitled { public static void main(String[] args) { String filepath = “/the/file/path/image.jpg”; File f = new File(filepath); String mimetype= new MimetypesFileTypeMap().getContentType(f); String type = mimetype.split(“https://stackoverflow.com/”)[0]; if(type.equals(“image”)) System.out.println(“It’s an image”); else System.out.println(“It’s NOT an image”); } }

How to simulate keyboard presses in java?

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java.awt.Robot might help. Here’s a simple sample code snippet from Java Tips: try { Robot robot = new Robot(); // Simulate a mouse click robot.mousePress(InputEvent.BUTTON1_MASK); robot.mouseRelease(InputEvent.BUTTON1_MASK); // Simulate a key press robot.keyPress(KeyEvent.VK_A); robot.keyRelease(KeyEvent.VK_A); } catch (AWTException e) { e.printStackTrace(); }

How to simulate keyboard presses in java?

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java.awt.Robot might help. Here’s a simple sample code snippet from Java Tips: try { Robot robot = new Robot(); // Simulate a mouse click robot.mousePress(InputEvent.BUTTON1_MASK); robot.mouseRelease(InputEvent.BUTTON1_MASK); // Simulate a key press robot.keyPress(KeyEvent.VK_A); robot.keyRelease(KeyEvent.VK_A); } catch (AWTException e) { e.printStackTrace(); }

What to import to use IOUtils.toString()?

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import org.apache.commons.io.IOUtils; If you still can’t import add to pom.xml: <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.5</version> </dependency> or for direct jar/gradle etc visit: http://mvnrepository.com/artifact/commons-io/commons-io/2.5 Also since version 2.5 of commons-io method IOUtils.toString(inputStream) has been deprecated. You should use method with Encoding i.e. IOUtils.toString(is, “UTF-8”);

How to read (std::io::Read) from a Vec or Slice?

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While vectors don’t support std::io::Read, slices do. There is some confusion here caused by Rust being able to coerce a Vec into a slice in some situations but not others. In this case, an explicit coercion to a slice is needed because at the stage coercions are applied, the compiler doesn’t know that Vec<u8> doesn’t … Read more

Why is “slurping” a file not a good practice?

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Again and again we see questions asking about reading a text file to process it line-by-line, that use variations of read, or readlines, which pull the entire file into memory in one action. The documentation for read says: Opens the file, optionally seeks to the given offset, then returns length bytes (defaulting to the rest … Read more

How to lock a file with C#?

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You need to pass in a FileShare enumeration value of None to open on the FileStream constructor overloads: fs = new FileStream(@”C:\Users\Juan Luis\Desktop\corte.txt”, FileMode.Open, FileAccess.ReadWrite, FileShare.None);

IPython: redirecting output of a Python script to a file (like bash >)

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IPython has its own context manager for capturing stdout/err, but it doesn’t redirect to files, it redirects to an object: from IPython.utils import io with io.capture_output() as captured: %run my_script.py print captured.stdout # prints stdout from your script And this functionality is exposed in a %%capture cell-magic, as illustrated in the Cell Magics example notebook. … Read more

How to write bytes to a file in Python 3 without knowing the encoding?

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It’s a matter of using APIs that operate on bytes, rather than strings. sys.stdout.buffer.write(bytes_) As the docs explain, you can also detach the streams, so they’re binary by default. This accesses the underlying byte buffer. tempfile.TemporaryFile().write(bytes_) This is already a byte API. open(‘filename’, ‘wb’).write(bytes_) As you would expect from the ‘b’, this is a byte … Read more

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)