Java File canWrite() method example

public boolean canWrite()

This method returns boolean, true if and only if the file system actually contains a file denoted by this abstract pathname and the application is allowed to write to the file; false otherwise.

Requires Java 1.0 and up

Below is a java code demonstrates the use of canWrite() method of File class. The example presented might be simple however it shows the behaviour of the canWrite() method. Basically we initialize a new File object that corresponds to a physical file which is writable and then the canWrite() method is used to check if the input file is writeable.

package com.javatutorialhq.java.examples;

import java.io.File;

/*
 * This example source code demonstrates the use of  
 * canWrite() method of File class.
 * 
 */

public class FileCanWriteExample {

	public static void main(String[] args) {
		
		// initialize File object
		File file = new File("C:javatutorialhqtest.txt");
		// check first if file exists
		if(file.exists()){
			//check if file can be written
			if(file.canRead()){
				System.out.println("User have permission to write on the file");
			}
			else{
				System.out.println("File is read only");
			}
		}
		else{
			System.out.println("File does not exists");
		}	
		
		
	}

}

Below is the sample output when you run the above example.

• Java File Class Tutorial
• Java Tutorial

• Oracle Java Documentation