Java PrintStream Class

Input/Output: Exploring java.io > Byte Streams >
Siva Nookala - 15 Apr 2016

PrintStream class enables you to write formatted data to an underlying OutputStream.PrintStream never throws an IOException.The PrintStream class contains format() and printf() methods.The PrintStream has a wide selection of contructors that enable you to connect it to a File, or an OutputStream.

PrintStream has the following Constructors.

Constructor	Description
`PrintStream(File file)`	It creates a new print stream, without automatic line flushing, with the specified file.
`PrintStream(File file, String csn)`	It creates a new print stream, without automatic line flushing, with the specified file and charset.
`PrintStream(OutputStream out),PrintStream(OutputStream out, boolean autoFlush),PrintStream(OutputStream out, boolean autoFlush, String encoding)`	These creates a new print stream.
`PrintStream(String fileName)`	It creates a new print stream, without automatic line flushing, with the specified file name.

The following are the some important PrintStream Methods.

CMethod	Description
`PrintStream append(char c)`	It appends the specified character to this output stream.
`PrintStream append(CharSequence csq, int start, int end)`	It appends a subsequence of the specified character sequence to this output stream.
`boolean checkError()`	It flushes the stream and checks its error state.
`protected void clearError()`	It clears the internal error state of this stream.
`void close()`	It closes stream.
`void flush()`	It flushes stream.
`void println(char x)`	It prints a character and then terminate the line.
`void write(byte[] buf, int off, int len)`	It writes len bytes from the specified byte array starting at offset off to this stream.

PrintStreamDemo

CODE

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import java.io.*;

class PrintStreamDemo
{
    public static void main(String arg[])
    {
        String s = "Alone we can do so little";//LINE A
        
        PrintStream ps = new PrintStream(System.out); //LINE B
        
        ps.format(" %s, Together we can do so much ", s);// LINE C
         
        ps.close();// LINE D
    
    }
}

OUTPUT

Alone we can do so little, Together we can do so much

DESCRIPTION

At LINE A we created a String. At LINE B we created PrintStream object. At LINE C we formated String. At LINE D we closed PrintStream.

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