The method java.io.File.getAbsoluteFile() can be used to acquire the absolute filename path from a relative filename path in Java. This method requires no parameters. It returns the file that is defined by the path name.A program that demonstrates this is given as follows −Example Live Demoimport java.io.File; public class Demo {    public static void main(String[] argv) throws Exception {       File file = new File("demo1.txt");       file = file.getAbsoluteFile();       System.out.println(file);    } }The output of the above program is as follows −Outputc:\JavaProgram\demo1.txtNow let us understand the above program.The method java.io.File.getAbsoluteFile() is used to ... Read More

Two file paths can be compared lexicographically in Java using the method java.io.File.compareTo(). This method requires a single parameter i.e.the abstract path name that is to be compared. It returns 0 if the two file path names are equal.A program that demonstrates this is given as follows −Example Live Demoimport java.io.File; public class Demo {    public static void main(String[] args) {       File file1 = new File("C:/File/demo1.txt");       File file2 = new File("C:/File/demo1.txt");       if (file1.compareTo(file2) == 0) {          System.out.println("Both the paths are lexicographically equal");       } else ... Read More

The double slash in the file path is required as to create the ’\’ character , another ‘\’ needs to be added to escape it. A program that demonstrates this is given as follows −Example Live Demoimport java.io.File; public class Demo {    public static void main(String[] args) {       File file = new File("C:\jdk11.0.2\demo1.txt");       System.out.println(file);    } }The output of the above program is as follows −OutputC:\jdk11.0.2\demo1.txtNow let us understand the above program.The file path of the file is provided with double slash and then it is printed. A code snippet that demonstrates this is ... Read More

The path for a file can be obtained using the method java.io.File.getPath(). This method returns the abstract pathname in the form of a pathname string and it requires no parameters.A program that demonstrates this is given as follows −Example Live Demoimport java.io.File; public class Demo {    public static void main(String[] args) {       File file = new File("C:" + File.separator + "jdk11.0.2" + File.separator, "demo1.java");       System.out.println("Path = " + file.getPath());    } }The output of the above program is as follows −OutputPath = C:/jdk11.0.2/demo1.javaNow let us understand the above program.The path name of the file ... Read More

The method java.io.File.getAbsolutePath() is used to obtain the absolute path of a file in the form of a string. This method requires no parameters.A program that demonstrates this is given as follows −Example Live Demoimport java.io.File; public class Demo {    public static void main(String[] args) {       File file = new File("C:" + File.separator + "jdk11.0.2" + File.separator, "demo1.java");       System.out.println("The absolute path name is: " + file.getAbsolutePath());    } }The output of the above program is as follows −OutputThe absolute path name is:/C:/jdk11.0.2/demo1.javaNow let us understand the above program.The absolute pathname of the file is ... Read More

The file extension is the suffix that is attached to the computer file and it denotes the format of the file. A program that demonstrates getting the file extension name is given as follows −Example Live Demoimport java.io.File; public class Demo {    private static String fileExtension(File file) {       String name = file.getName();       if(name.lastIndexOf(".") != -1 && name.lastIndexOf(".") != 0)          return name.substring(name.lastIndexOf(".") + 1);       else          return "";    }    public static void main(String[] args) {       File file = new File("demo1.txt"); ... Read More

A file attribute can be changed to read-only by using the method java.io.File.setReadOnly(). This method requires no parameters and it returns true if the file is set to read-only and false otherwise. The method java.io.File.canWrite() is used to check whether the file can be written to in Java and if not, then the file is confirmed to be read-only.A program that demonstrates this is given as follows −Example Live Demoimport java.io.File; public class Demo {    public static void main(String[] args) {       boolean flag;       try {          File file = new File("demo1.txt"); ... Read More

The file attribute can be changed to writable using the method java.io.File.setWritable(). This method has a single parameter i.e. a boolean value that if true allows the file to be writable and if false disallows the file to be writable. Also, this method returns true if the operation is successful and false otherwise.A program that demonstrates this is given as follows −Example Live Demoimport java.io.File; public class Demo {    public static void main(String[] args) {       try {          File file = new File("demo1.txt");          file.createNewFile();          file.setReadOnly();   ... Read More

One of the file attribute that can be set is to make the file read-only. This can be done by using the method java.io.File.setReadOnly(). This method requires no parameters and it returns true if the file is set to read-only and false otherwise.The java.io.File.canRead() and java.io.File.canWrite() methods are used to check whether the file can be read or written to respectively.A program that demonstrates this is given as follows −Example Live Demoimport java.io.File; public class Demo {    public static void main(String[] args) {       try {          File file = new File("demo1.txt");       ... Read More

The method java.io.File.getTotalSpace() is used to obtain the total space in the form of bytes for the partition specified by the required abstract path name. This method requires no parameters and it returns the bytes for the partition i.e. its total space.A program that demonstrates this is given as follows −Example Live Demoimport java.io.File; public class Demo {    public static void main(String[] args) {       File[] roots = File.listRoots();       try {          for(File r : roots) {             System.out.println(r);             System.out.println("Total space ... Read More