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Java Examples - Read-Only File


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Problem Description:

How to make a file read-only?

Solution:

This example demonstrates how to make a file read-only by using file.setReadOnly() and file.canWrite() methods of File class .

import java.io.File;

public class Main {
   public static void main(String[] args) {
      File file = new File("C:/java.txt");
      System.out.println(file.setReadOnly());
      System.out.println(file.canWrite());
   }
}

Result:

The above code sample will produce the following result.To test the example,first create a file 'java.txt' in 'C' drive.

true
false


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