i/o streams in java,Input/Output Streams in Core Java,Java I/O Tutorial
Every programming language supports keyboard input. Different languages come with different styles but any style should connect to the operating system’s input mechanism – a carrier style OS uses to transport data from keyboard to CPU for processing. Java uses System class to connect to OS input mechanism. "in" is an object of InputStream used …
Java I/O Streams – Overview File Copying Semantics of File copying – FileInputStream and FileOutputStream Skipping a few bytes in a file and reading File copying – Using FileReader & FileWriter Reading data types using DataInputStream and DataOutputStream Merging of files – SequenceInputStream Reading and writing sequentially and randomly – Using RandomAccessFile Filter Streams – …
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 …
To interact with a running program, that is to pass data for computation like user name, password or Employee particulars or Bank account credit and debit operations, two styles exist in a language like Java. Through Keyboard: It is very common input for practicing a language (but not in realtime). Again two types come here. …
1. Semantics of File copying – FileInputStream and FileOutputStream 2. Using FileReader & FileWriter 3. Rereading a file – Using markSupported(), mark() & reset() 4. Skipping a few bytes in a file and reading 5. Reading data types using DataInputStream and DataOutputStream 6. Reading and writing sequentially and randomly – Using RandomAccessFile 7. Merging of …
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
1. Performance drawbacks in file copying 2. Peak performance with BufferedInputStream and BufferedOutputStream and BufferedReader and BufferedWriter 3. Performance in file copying using DataInputStream and DataOutputStream Java IO at a Glance
InputStreamReader and OutputStreamWriter are two IO Streams linking byte streams with character streams. They are known as wrapper streams. 1. What is a Wrapper Stream? It is a good question not very clear to a Learner. I put it elaborately. Like we have wrapper classes which wraps primitive data types to give object form, we …
Filter Streams – FilterInputStream and FilterOutputStream, FilterReader and FilterWriter Java IO at a Glance
1. Java I/O Streams – Overview 2. Special Programs 3. Filter Streams 4. Wrapper Streams 5. Keyboard Reading 6. File Copying 7. Reading and writing arrays and strings 8. Performance tips in file copying Java IO at a Glance
1. To find number of lines in a file 2. Adding line numbers to a file – LineNumberInputStream, LineNumberReader 3. PrintStream vs PrintWriter 4. Byte streams vs Character streams 5. Byte streams and Character streams – file coying using FileReader and FileWriter 6. Pushing out Character – PushbackReader 7. Piping data between two streams – …
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 …
We have seen earlier, clearly the style and basics of file copying in Java, with byte streams FileInputStream and FileOutputStream in "Semantics of File Copying" and the it&339;s drawbacks of file copying in "Performance drawbacks of file copying". Now let us do the same job but with character streams – FileReader and FileWriter. The same …
Skip Read Part File Summary: In this tutorial "Skip Read Part File", you learn to skip a few bytes in a file and read the remaining bytes. In all the previous examples, the whole file is read from start to end. Java also permits to skip a few bytes in the file and read from …
Rereading from the Same Position The same contents of a file can be again and again read by marking the position with the methods of StringBufferInputStream, inherited from its super class InputStream. A file can be reread (reading again) from a particular location. Here, the file position is marked; execution control is taken back to …
Performance drawbacks File copying Summary: By the end of this tutorial "Performance drawbacks File copying", you will come to know the reasons of slow performance in file copying. Gives links to other programs to increase speed of copying. Performance drawbacks of FileInputStream and FileOutputStream Following is the for loop used in the FileToFile1.java program. while( …
Read bytes ByteArrayInputStream Summary: By the end of this tutorial "Read bytes ByteArrayInputStream", you will come to know to read a byte array. The byte array can be read fully or a few elements. Two separate programs given. This class is very useful to read data from byte arrays. For example, in UDP protocol, the …
StringBufferInputStream Example: As in the earlier program, where the source of reading is a byte array in case of ByteArrayInputStream, now the source is a string buffer in case of StringBufferInputStream. That is, StringBufferInputStream reads from a string buffer (or the other way, string). StringBufferInputStream class methods and constructors are deprecated (observe the compiler message …
The class ByteArrayOutputStream does just the opposite functionality of ByteArrayInputStream. The ByteArrayInputStream reads data from the array and now the ByteArrayOutputStream writes the data to the byte array. All the characters of the array can be written or a few also. In the following program, both functionalities are illustrated. import java.io.*; public class BAODemo { …
Like StringWriter stores data in a StringBuffer, the CharArrayWriter stores data in a character array. The array size increases implicitly when more data is added. The data stored with CharArrayWriter object can be obtained using toString() or toCharArray() methods. The ealier closing of CharArrayWriter object does not have any affect on the data it stored. …
