createTempFile(String prefix, String suffix, File directory): a static method that creates a temporary file : File « File « Java Tutorial

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Java Tutorial » File » File

11. 2. 27. createTempFile(String prefix, String suffix, File directory): a static method that creates a temporary file


import java.io.File;

public class MainClass {

  public static void main(String[] a) throws Exception {

    File tmp = File.createTempFile("foo", "tmp");

    System.out.println("Your temp file is " + tmp.getCanonicalPath());

  }

}

11. 2. File
	11. 2. 1.	The File Class
	11. 2. 2.	Testing and Checking File Objects: file name and path
	11. 2. 3.	Providing a URI for a remote file
	11. 2. 4.	isAbsolute(): Returns true if the File object refers to an absolute pathname, and false otherwise.
	11. 2. 5.	getParent(): Returns the name of the parent directory of the file or directory represented
	11. 2. 6.	getParentFile(): Returns the parent directory as a File object, or null if this File object does not have a parent.
	11. 2. 7.	toString(): Returns a String representation of the current File object
	11. 2. 8.	exists(): Returns true if it exists and false otherwise
	11. 2. 9.	isDirectory(): Returns true if it is an existing directory and false otherwise
	11. 2. 10.	isFile(): Returns true if it is an existing file and false otherwise
	11. 2. 11.	isHidden(): Returns true if it is hidden and false otherwise
	11. 2. 12.	canRead(): Returns true if you are permitted to read the file and false otherwise.
	11. 2. 13.	canWrite(): Returns true if you are permitted to write to the file and false otherwise.
	11. 2. 14.	getAbsolutePath(): Returns the absolute path for the directory or file referenced by the current File object
	11. 2. 15.	getAbsoluteFile(): Returns a File object containing the absolute path for the directory or file referenced by the current File object.
	11. 2. 16.	list(): Returns a string array containing the children files and directories
	11. 2. 17.	listFiles(): Returns a File array containing the children files and directories
	11. 2. 18.	length(): Returns the length of current file in long
	11. 2. 19.	Create a human-readable file size
	11. 2. 20.	lastModified(): Returns last modified time in milliseconds since midnight on 1st January 1970 GMT
	11. 2. 21.	renameTo(File path): Rename a file or directory
	11. 2. 22.	setReadOnly(): Sets the file as read-only and returns true if the operation is successful
	11. 2. 23.	Filtering a File List
	11. 2. 24.	mkdir(): Creates a directory
	11. 2. 25.	mkdirs(): Creates a directory including any parent directories
	11. 2. 26.	createNewFile(): Creates a new empty file
	11. 2. 27.	createTempFile(String prefix, String suffix, File directory): a static method that creates a temporary file
	11. 2. 28.	delete(): delete the file or directory
	11. 2. 29.	Display File class constants and test some methods
	11. 2. 30.	deleteOnExit(): delete file or directory when the program ends
	11. 2. 31.	File Class Enhancements
	11. 2. 32.	Creates a file and sets it to read-only.
	11. 2. 33.	Create a file and change its attribute to readonly
	11. 2. 34.	List all roots
	11. 2. 35.	Get the free space
	11. 2. 36.	Get the usable space
	11. 2. 37.	Get the total space
	11. 2. 38.	Set file attributes.
	11. 2. 39.	Change a file attribute to writable
	11. 2. 40.	Change a file attribute to read only
	11. 2. 41.	Getting a Proper URL from a File Object
	11. 2. 42.	Get icon for file type
	11. 2. 43.	Get all xml files by file extension
	11. 2. 44.	Get file extension name
	11. 2. 45.	File.getCanonicalFile() converts a filename path to a unique canonical form suitable for comparisons.

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