How to set and change file permission using java

The following list method which support to check and change file permission using Java API

Check if the file permission allow :

1. file.canExecute(); – return true, file is executable; false is not.
2. file.canWrite(); – return true, file is writable; false is not.
3. file.canRead(); – return true, file is readable; false is not.

Set the file permission :

1. file.setExecutable(boolean); – true, allow execute operations; false to disallow it.
2. file.setReadable(boolean); – true, allow read operations; false to disallow it

import java.io.File;
import java.io.IOException;

public class FilePermissionDemo
{
    public static void main( String[] args )
    { 
     try {
       
       File file = new File("/mkyong/shellscript.sh");
       
       if(file.exists()){
        System.out.println("Is Execute allow : " + file.canExecute());
    System.out.println("Is Write allow : " + file.canWrite());
    System.out.println("Is Read allow : " + file.canRead());
       }
          
       file.setExecutable(false);
       file.setReadable(false);
       file.setWritable(false);
       
       System.out.println("Is Execute allow : " + file.canExecute());
       System.out.println("Is Write allow : " + file.canWrite());
       System.out.println("Is Read allow : " + file.canRead());
       
       if (file.createNewFile()){
         System.out.println("File is created!");
       }else{
         System.out.println("File already exists.");
       }
       
     } catch (IOException e) {
       e.printStackTrace();
     }
    }
}

 

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