Bufferedreader e inputstreamreader

Feb 26, 2008

AlarmClock; BlockedNumberContract; BlockedNumberContract.BlockedNumbers; Browser; CalendarContract; CalendarContract.Attendees; CalendarContract.CalendarAlerts java.util.Scanner class is a simple text scanner which can parse primitive types and strings. It internally uses regular expressions to read different types. Java.io.BufferedReader class reads text from a character-input stream, buffering characters so as to provide for the efficient reading of sequence of characters Create BufferedReader from InputStreamReader and read line by line : InputStreamReader « File Input Output « Java BufferedReader is used to decrease the time for taking input. Generally, we use the Scanner class. BufferedReader inp = new BufferedReader (new InputStreamReader(System.in)); int T= Integer.parseInt(inp.readLine()); // for taking a number as an input String str = inp.readLine(); // for taking a string as an input Re: BufferedReader.read() from input stream 843790 Feb 26, 2008 3:40 AM ( in response to EJP ) If I take out the outer loop, then I can receive one message only. Each invocation of one of an InputStreamReader's read() methods may cause one or more bytes to be read from the underlying byte-input stream. For top efficiency, consider wrapping an InputStreamReader within a BufferedReader; for example, BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); See Also:

BufferedReader \ Language (API) \ Processing 3+

Java BufferedReader Class for beginners and professionals with examples on Java IO or Input Output in Java with input stream, output stream, reader and writer class. The java.io package provides api to reading and writing data. FileReader reader = new FileReader(“MyFile.txt”); BufferedReader bufferedReader = new BufferedReader(reader); will buffer the input from the specified file. Without buffering, each invocation of read() or readLine() could cause bytes to be read from the file, converted into characters, and then returned, which can be very inefficient.

How to convert inputstream to reader or BufferedReader

/** * Returns a buffered reader that reads from a file using the given character set. * *

{@link java.nio.file.Path} equivalent: {@link * java.nio.file.Files#newBufferedReader(java.nio.file.Path, Charset)}. * * @param file the file to read from * @param charset the charset used to decode the input stream; see {@link StandardCharsets