Quiz on Java File Class

Which of the following is used to get the input characters from a file ?

class  FileClass {

public static void main ( String args [ ] )

{

String message = “ DataFlair “;

Path filepath = Path.of(“C:\Program Files\Android\Android Studio\file.txt”);

File.writeString( filepath , message );

}

}

 class FileWriterClass {

String text = “This is a method to write in file “;

public static void main ( String args [ ] )

{

FileWriter writer = new Filewriter(“C:\Program Files\JAVA\JavaPrograms\FileWriterClass”);

writer.write(text);

System.out.println(text);

writer.close();

}

}

Which of the following cannot be performed by file class in Java ?

Which of the following is not the correct syntax for writing content into a file ?

class FileClass {

public static void main ( String args[ ] )

{

File file = new File(“C:\Program Files\JAVA\JavaPrograms\FileClass”);

FileInputStream input = new FileInputStream(file);

InputStreamReader reader = new InputStreamReader(input);

BufferReader buffer = new BufferReader(reader);

String text;

While(text=buffer.readline()!=null){

System.out.println(“file is opened”);

}

buffer.close();

}

}

 class FilePermissions {

public static void main ( String args [ ] )

{

File file = new File(“C:\Program Files\JAVA\JavaPrograms\FilePermissions”);

file.setReadable(true,false);

file.setWritable(true,false);

file.setExecutable(true,true);

}

}

class FileDelete {

public static void main ( String args [ ] )

{

File file = new File(“C:\Program Files\JAVA\JavaPrograms\FileDelete”);

InputReader input = new InputReader(file);

InputStream str = new InputStream(input);

BufferReader reader = new BufferReader(str);

String Text = file.readline();

file.delete();

System.out.println(Text);

}

}

Which of the following methods is used to get the number of unallocated bytes in partition ?

class Files {

public static void main ( String args [ ] )

{

File file = new File(“C:\Program Files\JAVA\JavaPrograms\Files”);

file.delete();

String content = file.readline();

}

}

class Length {

public static void main ( String args [ ] )

{

File file = new File(“C\ProgramFiles\Java\Length”);

String content = “New File”;

file.write(content);

System.out.println(file.length());

}

}

What is the input to perform any operation of the file ?

class FileOperation {

public static void main ( String args [ ] )

{

File file = new File(“C\ProgramFiles\Java\FileOperations”);

file.getname();

}

}

What is the function of the public boolean setReadOnly() method ?

class FileClass {

public static void main ( String args [ ] )

{

File file = new File(“C\ProgramFiles\Java\FileClass”);

if(File.mkdir())

{

System.out.println(“File is present in new directory”);

}

else

{

System.out.println(“File is present in the same directory”);

}

}

}