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Java Tutorial : Java IO (Java File - How to set the file permission)

FileDemo.java

import java.io.File;

public class FileDemo
{

    public static void main(String[] args)
    {
        File file = new File("/home/start.sh");

        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("----------------------------------------");
        System.out.println("Is Execute allow : " + file.canExecute());
        System.out.println("Is Write allow : " + file.canWrite());
        System.out.println("Is Read allow : " + file.canRead());

    }

}

import java.io.File;

public class FileDemo1
{

    public static void main(String[] args)
    {
        File file = new File("/home/hello.sh");

        /*
         * Marks the file or directory named by this
         * abstract pathname so that only read operations
         * are allowed.
         */
        file.setReadOnly();

        if (file.canWrite())
        {
            System.out.println("This file is writable");
        }
        else
        {
            System.out.println("This file is read only");
        }

        /*
         * A convenience method to set the owner's write
         * permission for this abstract pathname.
         */
        file.setWritable(true);

        if (file.canWrite())
        {
            System.out.println("This file is writable");
        }
        else
        {
            System.out.println("This file is read only");
        }

    }

}