JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS
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How to get list of all file objects from a folder in java?


Description:

Below example shows how to get list of all file objects from the given folder. First create File object by passing folder path. Call listFiles() method on file object to get list of file names in the given folder.


Code:
package com.java2novice.files;

import java.io.File;

public class FilesListFromFolder {
	
	public static void main(String a[]){
		File file = new File("C:/MyFolder/");
		File[] files = file.listFiles();
		for(File f: files){
			System.out.println(f.getName());
		}
	}
}
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Java File IO Operations Sample Code Examples

  1. All file operations.
  2. Show list of all file names from a folder.
  3. How to get list of all files from a folder?
  4. Filter the files by file extensions and show the file names.
  5. How to read file content using byte array?
  6. How to read file content line by line in java?
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  8. How to read input from console in java?
  9. How to get file list from a folder filtered by extensions?
  10. How to get file URI reference?
  11. How to store and read objects from a file?
  12. How to create and store property file dynamically?
  13. How to store property file as xml file?
  14. How to get file last modified time?
  15. How to convert byte array to inputstream?
  16. How to convert inputstream to reader or BufferedReader?
  17. How to convert byte array to reader or BufferedReader?
  18. How to set file permissions in java?
  19. How to read a file using BufferedInputStream?
  20. How to create temporary file in java?
  21. How to write or store data into temporary file in java?
  22. How to delete temporary file in java?
  23. How to write string content to a file in java?
  24. How to write byte content to a file in java?
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When to use LinkedList or ArrayList?
Accessing elements are faster with ArrayList, because it is index based. But accessing is difficult with LinkedList. It is slow access. This is to access any element, you need to navigate through the elements one by one. But insertion and deletion is much faster with LinkedList, because if you know the node, just change the pointers before or after nodes. Insertion and deletion is slow with ArrayList, this is because, during these operations ArrayList need to adjust the indexes according to deletion or insetion if you are performing on middle indexes. Means, an ArrayList having 10 elements, if you are inserting at index 5, then you need to shift the indexes above 5 to one more.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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