Should I use FileReader or FileInputStream?

Once you know this fundamental difference between stream and reader, understanding difference between FileInputStream and FileReader is quite easy. Both allows you to read data from File, but FileInputStream is used to read binary data, while FileReader is used to read character data.

What is the difference between FileInputStream and FileReader?

FileInputStream is Byte Based, it can be used to read bytes. FileReader is Character Based, it can be used to read characters. FileInputStream is used for reading binary files. FileReader is used for reading text files in platform default encoding.

What is the difference between FileInputStream and FileOutputStream?

InputStream − This is used to read (sequential) data from a source. OutputStream − This is used to write data to a destination.

Why do we use FileInputStream?

FileInputStream class is useful to read data from a file in the form of sequence of bytes. FileInputStream is meant for reading streams of raw bytes such as image data. For reading streams of characters, consider using FileReader.

What is the difference between FileInputStream and ByteArrayInputStream?

The InputStream is an abstract class and ByteArrayInputStream is a concrete class of InputStream and offers its own implementation of the abstract idea given by (InputStream), In Addition : A ByteArrayInputStream contains an internal buffer that contains bytes that may be read from the stream.

Part 4 : File Handling in Java : Read A File (FileReader, Buffered Reader, FileInputStream)

Is FileInputStream buffered?

BufferedInputStream is buffered, but FileInputStream is not.

Do I need to close ByteArrayInputStream?

It is always good practice to close your readers. However not closing a ByteArrayInputStream does not have as heavy of a potential negative effect because you are not accessing a file, just a byte array in memory. The documentation for ByteArrayInputStream will confirm that close() does nothing.

Is it necessary to close FileInputStream?

Yes, you need to close the inputstream if you want your system resources released back. FileInputStream. close() is what you need.

What is an advantage of using a DataOutputStream?

Java DataOutputStream class allows an application to write primitive Java data types to the output stream in a machine-independent way. Java application generally uses the data output stream to write data that can later be read by a data input stream.

What is difference between FileReader and BufferedReader?

FileReader is used to read a file from a disk drive whereas BufferedReader is not bound to only reading files. It can be used to read data from any character stream.

What is FileInputStream and FileOutputStream explain in brief?

In Java, FileInputStream and FileOutputStream are byte streams that read and write data in binary format, exactly 8-bit bytes. They are descended from the abstract classes InputStream and OutputStream which are the super types of all byte streams.

Which package have FileInputStream and FileOutputStream classes?

The FileInputStream class of the java.io package can be used to read data (in bytes) from files. It extends the InputStream abstract class.

What is the use of FileOutputStream in java?

The FileOutputStream class of the java.io package can be used to write data (in bytes) to the files. It extends the OutputStream abstract class.

Is FileReader buffered?

FileReader is an unbuffered character stream.

What is the difference between scanner and FileReader?

Well: FileReader is just a Reader which reads a file, using the platform-default encoding (urgh) BufferedReader is a wrapper around another Reader , adding buffering and the ability to read a line at a time. Scanner reads from a variety of different sources, but is typically used for interactive input.

What is the difference between file and FileReader in Java?

Edit : To answer to your edited question where you changed FileWriter to FileReader , the main difference between a File and a FileReader is that File does not have a close method while a FileReader does and implement Closeable .

When should I use DataOutputStream?

A data output stream lets an application write primitive Java data types to an output stream in a portable way. An application can then use a data input stream to read the data back in.

Is it true that DataInputStream DataOutputStream can always be replaced by?

An array can be serialized if all its elements can be serialized. Is it true that DataInputStream/DataOutputStream can always be replaced by ObjectInputStream/ObjectOutputStream? Yes. Because ObjectInputStream/ObjectOutputStream contains all features and operations in DataInputStream/DataOutputStream.

What is the difference between DataInputStream and DataOutputStream class in Java?

InputStream and OutputStream are the most generic IO streams you can use and they are the base class of all streams in Java. You can read and write raw bytes only with them. DataInputStream writes formatted binary data.

What happens if you don't close InputStream?

The operating system will only allow a single process to open a certain number of files, and if you don't close your input streams, it might forbid the JVM from opening any more. I am talking about an InputStream in general. And not just a FileInputStream.

Does FileOutputStream create a new file?

Java creating file with FileOutputStream

In the second example, we create a new, empty file with FileOutputStream . The file is created when FileOutputStream object is instantiated. If the file already exists, it is overridden.

Do I need to close InputStreamReader?

Therefore, if you close the Reader, you don't need to also close the InputStream.

Is ByteArrayInputStream thread safe?

Yes it is thread safe, or rather all its methods are synchronized, and ProcessBuilder. redirectErrorStream() makes your entire question redundant. Not a real question.

Is it necessary to close ByteArrayOutputStream?

In summary: It does no harm to flush() or close() a bare ByteArrayOutputStream . It is just unnecessary. It is often necessary to close an output pipeline that ends in a ByteArrayOutputStream , but this is not because of memory usage or GC considerations.

Does ByteArrayInputStream support mark and reset?

markSupported() method returns true if the input stream supports mark() and reset() methods invocations. For ByteArrayInputStream the method always returns true.