Java IO special file operations
Bridging byte streams to character streams on writing-side The byte streams and character streams are incompatible for linking as the first one operates on 8-bit ASCII characters and the other on 16-bit Unicode characters. To link them explicitly, two classes exist in java.io package, InputStreamReader and OutputStreamWriter. Towards this functionality, we have seen earlier InputStreamReader …
A file can be read either sequentially (continuously) or randomly (here and there). So far, in all the programs, what we have done is sequential access, starting from the beginning of the file to the end of the file. Or we have skipped some bytes in a file and read the remaining bytes of the …
These two streams are carriers of data to a destination. Both look alike, but they differ in some finer concepts. Basically, the OutputStream class (super class of PrintStream) is an abstract class, JDK 1.0, that includes methods to write a stream of bytes in a sequential order The Writer class (super class of PrintWriter) is …
Almost all the java.io package classes are streams. A stream is a carrier of data. To carry data, even sockets, use I/O streams. Infact, the methods getInputStream() and getOutputStream() of java.net.Socket returns an object of InputStream class and OutputStream class. InputStreamReader and OutputStreamWriter are non-stream classes. They are not streams; they are converters or wrappers …
File class Changing File Properties Summary: By the end of this tutorial "File class Changing File Properties", you will come to know how to create and delete a file or create a new directory etc using Java code. After retrieving the properties of a file with File class, let us attempt to change the properties …
1. Reading and writing into byte arrays – ByteArrayInputStream and ByteArrayOutputStream 2. Reading and writing to char arrays – CharArrayReader and CharArrayWriter 3. Reading strings using StringBufferInputStream, StringReader, StringWriter
Breaking a string or stream into meaningful independent words is known as tokenization. Tokenization is a common practice to tool developers. java.util package includes StringTokenizer which tokenizes a string into independent words. For StringTokenizer, the source is a string. There comes a similar tokenizer, StreamTokenize with java.io package for which source is a stream. Here, …
Sometimes, in coding, it is required to know the number of lines existing in a file programmatically. There is no direct way (a predefined method) to find out in Java. To do the job, the help of BufferedReader's readLine() method is taken. While reading each line, the counter is incremented; the simplest way to achieve …
Closeable and Flushable interfaces were introduced with JDK 1.5 version and part of java.io package. 1. Closeable interface (of Closeable Flushable Java) The Closeable interface includes only one abstract method, close(). When close() method is called, the system resources held by the stream object are released and can be used by other part of the …
StringWriter vs StringBuilder given in simple terms for Beginner. Even though, some string word is common in both of them (like Java and JavaScript), both are very different in their functionalities. We cannot compare them because both are very different from different packages. 1. StringWriter StringWriter from java.io package is a stream class capable to …
