java barcode reader open source BufferedWriter in Java

Making Denso QR Bar Code in Java BufferedWriter

BufferedWriter
QR Code Creation In Java
Using Barcode printer for Java Control to generate, create QR Code JIS X 0510 image in Java applications.
Quick Response Code Scanner In Java
Using Barcode recognizer for Java Control to read, scan read, scan image in Java applications.
A BufferedWriter is a Writer that adds a flush( ) method that can be used to ensure that data buffers are physically written to the actual output stream Using a BufferedWriter can increase performance by reducing the number of times data is actually physically written to the output stream A BufferedWriter has these two constructors: BufferedWriter(Writer outputStream) BufferedWriter(Writer outputStream, int bufSize) The first form creates a buffered stream using a buffer with a default size In the second, the size of the buffer is passed in bufSize
Paint Bar Code In Java
Using Barcode printer for Java Control to generate, create bar code image in Java applications.
Barcode Decoder In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
PushbackReader
Generate Quick Response Code In C#.NET
Using Barcode drawer for .NET framework Control to generate, create QR Code image in VS .NET applications.
Make QR Code JIS X 0510 In Visual Studio .NET
Using Barcode encoder for ASP.NET Control to generate, create QR Code ISO/IEC18004 image in ASP.NET applications.
The PushbackReader class allows one or more characters to be returned to the input stream This allows you to look ahead in the input stream Here are its two constructors: PushbackReader(Reader inputStream) PushbackReader(Reader inputStream, int bufSize)
QR Code Maker In Visual Studio .NET
Using Barcode encoder for Visual Studio .NET Control to generate, create QR Code 2d barcode image in .NET framework applications.
QR Code Drawer In VB.NET
Using Barcode creator for .NET Control to generate, create QR Code ISO/IEC18004 image in VS .NET applications.
- 386 -
Barcode Generator In Java
Using Barcode generation for Java Control to generate, create barcode image in Java applications.
Print Linear Barcode In Java
Using Barcode generation for Java Control to generate, create Linear 1D Barcode image in Java applications.
The first form creates a buffered stream that allows one character to be pushed back In the second, the size of the pushback buffer is passed in bufSize PushbackReader provides unread( ), which returns one or more characters to the invoking input stream It has the three forms shown here: void unread(int ch) void unread(char buffer[ ]) void unread(char buffer[ ], int offset, int numChars) The first form pushes back the character passed in ch This will be the next character returned by a subsequent call to read( ) The second form returns the characters in buffer The third form pushes back numChars characters beginning at offset from buffer An IOException will be thrown if there is an attempt to return a character when the pushback buffer is full The following program reworks the earlier PushBackInputStream example by replacing PushBackInputStream with a PushbackReader As before, it shows how a programming language parser can use a pushback stream to deal with the difference between the == operator for comparison and the = operator for assignment // Demonstrate unread() import javaio*; class PushbackReaderDemo { public static void main(String args[]) throws IOException { String s = "if (a == 4) a = 0;\\n"; char buf[] = new char[slength()]; sgetChars(0, slength(), buf, 0); CharArrayReader in = new CharArrayReader(buf); PushbackReader f = new PushbackReader(in); int c; while ((c = fread()) != -1) { switch(c) { case '=': if ((c = fread()) == '=') Systemoutprint("eq"); else { Systemoutprint("<-"); funread(c); } break; default: Systemoutprint((char) c); break; } }
Printing UPC-A In Java
Using Barcode encoder for Java Control to generate, create UPC-A Supplement 2 image in Java applications.
Create GS1 128 In Java
Using Barcode encoder for Java Control to generate, create EAN128 image in Java applications.
PrintWriter
MSI Plessey Generation In Java
Using Barcode generator for Java Control to generate, create MSI Plessey image in Java applications.
Draw Linear In Visual Studio .NET
Using Barcode maker for ASP.NET Control to generate, create 1D Barcode image in ASP.NET applications.
PrintWriter is essentially a character-oriented version of PrintStream It provides the formatted output methods print( ) and println( ) PrintWriter has four constructors: PrintWriter(OutputStream outputStream) PrintWriter(OutputStream outputStream, boolean flushOnNewline) PrintWriter(Writer outputStream) PrintWriter(Writer outputStream, boolean flushOnNewline)
Bar Code Encoder In Java
Using Barcode generator for BIRT reports Control to generate, create barcode image in BIRT applications.
Create Bar Code In C#.NET
Using Barcode drawer for Visual Studio .NET Control to generate, create bar code image in .NET framework applications.
- 387 -
Generate Barcode In Visual Studio .NET
Using Barcode encoder for ASP.NET Control to generate, create barcode image in ASP.NET applications.
Generating Data Matrix In Java
Using Barcode creator for BIRT Control to generate, create DataMatrix image in BIRT applications.
where flushOnNewline controls whether Java flushes the output stream every time a newline (\\n) character is output If flushOnNewline is true, flushing automatically takes place If false, flushing is not automatic The first and third constructors do not automatically flush Java's PrintWriter objects support the print( ) and println( ) methods for all types, including Object If an argument is not a simple type, the PrintWriter methods will call the object's toString( ) method and then print out the result
Data Matrix ECC200 Reader In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
Bar Code Reader In C#.NET
Using Barcode reader for Visual Studio .NET Control to read, scan read, scan image in Visual Studio .NET applications.
Using Stream I/O
The following example demonstrates several of Java's I/O character stream classes and methods This program implements the standard wc (word count) command The program has two modes: if no filenames are provided as arguments, the program operates on the standard input stream If one or more filenames are specified, the program operates on each of them // A word counting utility import javaio*; class WordCount public static public static public static { int words = 0; int lines = 0; int chars = 0;
public static void wc(InputStreamReader isr) throws IOException { int c = 0; boolean lastWhite = true; String whiteSpace = " \\t\\n\\r"; while ((c = isrread()) != -1) { // Count characters chars++; // Count lines if (c == '\\n') { lines++; } // Count words by detecting the start of a word int index = whiteSpaceindexOf(c); if(index == -1) { if(lastWhite == true) { ++words; } lastWhite = false; } else { lastWhite = true; } } if(chars != 0) { ++lines; }
public static void main(String args[]) { FileReader fr; try { if (argslength == 0) { // We're working with stdin wc(new InputStreamReader(Systemin));
- 388 -
} catch (IOException e) { return; } Systemoutprintln(lines + " " + words + " " + chars);
} else { // We're working with a list of files for (int i = 0; i < argslength; i++) { fr = new FileReader(args[i]); wc(fr); } }
The wc( ) method operates on any input stream and counts the number of characters, lines, and words It tracks the parity of words and whitespace in the lastNotWhite variable When executed with no arguments, WordCount creates an InputStreamReader object using Systemin as the source for the stream This stream is then passed to wc( ), which does the actual counting When executed with one or more arguments, WordCount assumes that these are filenames and creates FileReaders for each of them, passing the resultant FileReader objects to the wc( ) method In either case, it prints the results before exiting
Copyright © OnBarcode.com . All rights reserved.