JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Program: All file operations.


Description:
Below example shows basic operations on File object.
canRead(): Tests whether the application can read the file canWrite(): Tests whether the application can modify the file createNewFile(): Tests whether the application can modify the file delete(): Deletes the file or directory exists(): Tests whether the file or directory exists. getAbsolutePath(): Returns the absolute pathname string. isDirectory(): Tests whether the file is a directory or not. isHidden(): Tests whether the file is a hidden file or not. list(): Returns an array of strings naming the files and directories in the directory.

Code:
package com.java2novice.files;

import java.io.File;

public class MyFileOperations {

	public static void main(String[] a){
		
		try{
			File file = new File("fileName");
			//Tests whether the application can read the file 
			System.out.println(file.canRead());
			//Tests whether the application can modify the file
			System.out.println(file.canWrite());
			//Tests whether the application can modify the file 
			System.out.println(file.createNewFile());
			//Deletes the file or directory
			System.out.println(file.delete());
			//Tests whether the file or directory exists.
			System.out.println(file.exists());
			//Returns the absolute pathname string.
			System.out.println(file.getAbsolutePath());
			//Tests whether the file is a directory or not.
			System.out.println(file.isDirectory());
			//Tests whether the file is a hidden file or not.
			System.out.println(file.isHidden());
			//Returns an array of strings naming the 
			//files and directories in the directory.
			System.out.println(file.list());
		} catch(Exception ex){
			
		}
	}
}
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  22. How to delete temporary file in java?
  23. How to write string content to a file in java?
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Knowledge Centre
What is daemon thread?
Daemon thread is a low priority thread. It runs intermittently in the back ground, and takes care of the garbage collection operation for the java runtime system. By calling setDaemon() method is used to create a daemon thread.
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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java is registered trademark of Oracle.
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