In this post I am going to show you how to use SequenceInputStream in Java. A SequenceInputStream first reads all the bytes from the first stream in the sequence, then all the bytes from the second, third and so on. When the end of one stream is reached, that stream is closed and the next data . . . → Read More: Using Sequence Input Stream in Java
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You can download it from this link. The System class maintains a Properties object that describes the configuration of the current working environment. System properties include information about the current user, the current version of the Java runtime, and the character used to separate components of a file path name. I am going to demonstrate example which shows how to get environment variables from Java code import java.io.IOException; /** public static void main(String[] args) throws IOException { Java has great API for working with properties. Data streams read and write strings, integers, floating-point numbers, and other data. The and classes read and write the primitive Java data types (boolean, int, double, etc.) and strings in a particular, well-defined, platform-independent format. Since DataInputStream and DataOutputStream use the same formats, they’re complementary. These classes are especially useful when you need to move data between platforms that may use different native formats for integers or floating-point numbers. I want to show how I implemented filter output stream that send data to multiple underlying streams. import java.io.FilterOutputStream; /** private OutputStream . . . → Read More: Multitargeting output streams in Java The PushbackInputStream class provides a pushback buffer so a program can “unread” bytes. In other words, it can add bytes to the stream and then read them. This class allows to add data to the stream while they’re reading it. The next time data is read from the stream, the unread bytes are reread. import java.io.IOException; /** Buffered input streams read more data than they initially need into a buffer (an internal array of bytes). When one of the stream’s read() methods is invoked, data is removed from the buffer rather than from the underlying stream. When the buffer runs out of data, the buffered stream refills its buffer from the underlying stream. Also, buffered output streams store data in an internal byte array until the buffer is full or the stream is flushed. Then the data is written out to the underlying output stream in one swoop. In situations where it’s almost as fast to read or write several hundred bytes from the underlying stream as it is to read or write a single byte, a buffered stream can provide a significant performance boost. Continue reading Using buffered streams in Java Filter input streams read data from a preexisting input stream such as a and have an opportunity to work with or change the data before it is delivered to the client program. Filter output streams write data to a preexisting output stream such as a and have an opportunity to work with or change the data before it is written onto the underlying stream. A stream filter sits between the source of the data and its eventual destination and applies a specific algorithm to the data. |
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