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Easy methods to Change File Permissions in Java – Instance Tutorial


Howdy guys, Within the final article, we noticed the best way to verify whether or not an utility can entry the file and carry out any read-write or execute an operation on that file by utilizing the inbuilt technique offered by File Object. Now we take care of some extra strategies of file class which is able to use to supply some privileges to customers in order that they will carry out learn, write, and execute operations on the actual file. There are few extra strategies added with the brand new File API in Java 7, however on this tutorial, we’ll solely find out about conventional methods to alter the permission of a file from the Java program, which ought to work on all variations of JDK.

Easy methods to set Execute Permission on File in Java

 boolean setExecutable(boolean exe, boolean owneronly) : This technique is used to set the execute permission for the proprietor  of the file and in addition we are able to present each person execute permission utilizing this technique, if the operation is profitable then this technique returns true.

This technique is overloaded on this class if we wish to present execute permission solely to the proprietor we are able to additionally use technique  boolean setExecutable(boolean exe).

Here’s a code instance of setting or altering execute permission on File in Java. you may as well change execute permission on listing equally. In Unix, if a listing does not must execute permission means you can’t go inside that listing.

import java.io.File;

public class SetExecuteTest{

       public static void essential(String[] args)throws SecurityException {

        File file = new File(“C:/setExecuteTest.txt”);

        if (file.exists()) {

            boolean bval = file.setExecutable(true);

            System.out.println(“set the proprietor’s execute permission: “+ bval);

        } else {

            System.out.println(“File can not exists: “);

        }

       if (file.exists()) {

            boolean bval = file.setExecutable(true,false);

            System.out.println(“set the everyone execute permission: “+ bval);

        } else {

            System.out.println(“File can not exists: “);

        }

    }

}

Easy methods to set Write Permission on File in Java

how to change or set file permissions in java code exampleboolean setWriteable(boolean write,boolean owneronly) : This technique is used to set the write permission for the proprietor of the file, and in addition we are able to present each person write permission utilizing this technique ,if the operation is profitable then this technique returns true. 

This technique is overloaded and if we wish to present write permission solely to the proprietor of the file we are able to use as an alternative boolean setWritable(boolean write).

here’s a code instance of setting write permission to a file in Java. identical code can be used to alter write permission from a Java File.

import java.io.File;

public class SetWritableTest{

       public static void essential(String[] args)throws SecurityException {

        File file = new File(“C:/setWriteableTest.txt”);

        

        //set write permission on file just for proprietor

        if (file.exists()) {

            boolean bval = file.setWritable(true);

             System.out.println(“set the proprietor’s write permission: “+ bval);

        } else {

             System.out.println(“File can not exists: “);

        }

        //Set write permission on File for all.

        if (file.exists()) {

            boolean bval = file.setWritable(true,false);

            System.out.println(“set the each person write permission: “+ bval);

        } else {

            System.out.println(“File can not exists: “);

        }

    }

}

Easy methods to set Learn Permission on File in Java

boolean setReadable(boolean learn,boolean owneronly) : This technique is used to set the learn permission for the proprietor of the file and in addition we are able to present each person learn permission utilizing this technique,if the operation is profitable then this technique returns true. This technique is overloaded and if we wish to present learn permission solely to the proprietor we are able to use as an alternative boolean setReadable(boolean learn).

here’s a full code instance to set write permission on File in Java. this code can be used change write permission of a file in Java.

import java.io.File;

public class SetReadableTest{

       public static void essential(String[] args)throws SecurityException {

        File file = new File(“C:/setReadableTest.txt”);

        if (file.exists()) {

            boolean bval = file.setReadable(true);

            System.out.println(“set the Proprietor Learn permission: “+ bval);

        } else {

            System.out.println(“File can not exists: “);

        }

       if (file.exists()) {

            boolean bval = file.setReadable(true,false);

            System.out.println(“set the each person Learn permission: “+ bval);

        } else {

            System.out.println(“File can not exists: “);

        }

    }

}

Easy methods to make a listing read-only in Java

boolean setReadOnly() : This technique is used to make the file or listing read-only if we name this technique on any file then no write operation can’t be carried out on that file.

import java.io.*;

public class SetReadOnlyTest{

      public static void essential(String[] args)throws SecurityException {

           

        File file = new File(“C:/setReadOnlyTest.txt”);

        if (file.exists()) {

            boolean bval = file.setReadOnly();

            System.out.println(“Learn opearation is permitted: “+bval);

        } else {

            System.out.println(“File can not exists: “);

        }

    }

}

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