Java Reader Download For Android
Java Reader is an abstract class for reading character streams. The only methods that a subclass must implement are read(char[], int, int) and close(). Most subclasses, however, will override some of the methods to provide higher efficiency, additional functionality, or both.
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VeryPDF Java PDF Reader is a Swing component that can display PDF documents and other formats, such as PDF, TXT, TIF, JPG, PNG, GIF, BMP, PBM, TGA, JBIG2, JPEG2000, MS Office document formats. Example of code to implement a PDF reader. Is there a Free PDF Viewer that I can use for my Application? I am looking for a PDF Viewer that can search, highlight text, view the page that user wants, and without altering the contents of the PDF file. Just like Adobe Reader but for Android that can be implemented to a Application.
Some of the implementation class are BufferedReader, CharArrayReader, FilterReader, InputStreamReader, PipedReader, StringReader
Fields
| Modifier and Type | Field | Description |
|---|---|---|
| protected Object | lock | The object used to synchronize operations on this stream. |
Constructor
| Modifier | Constructor | Description |
|---|---|---|
| protected | Reader() | It creates a new character-stream reader whose critical sections will synchronize on the reader itself. |
| protected | Reader(Object lock) | It creates a new character-stream reader whose critical sections will synchronize on the given object. |
Methods
| Modifier and Type | Method | Description |
|---|---|---|
| abstract void | close() | It closes the stream and releases any system resources associated with it. |
| void | mark(int readAheadLimit) | It marks the present position in the stream. |
| boolean | markSupported() | It tells whether this stream supports the mark() operation. |
| int | read() | It reads a single character. |
| int | read(char[] cbuf) | It reads characters into an array. |
| abstract int | read(char[] cbuf, int off, int len) | It reads characters into a portion of an array. |
| int | read(CharBuffer target) | It attempts to read characters into the specified character buffer. |
| boolean | ready() | It tells whether this stream is ready to be read. |
| void | reset() | It resets the stream. |
| long | skip(long n) | It skips characters. |
Example
file.txt:
Output:
Java FileReader class is used to read data from the file. It returns data in byte format like FileInputStream class.
It is character-oriented class which is used for file handling in java.
Java FileReader class declaration
Let's see the declaration for Java.io.FileReader class:
Constructors of FileReader class
| Constructor | Description |
|---|---|
| FileReader(String file) | It gets filename in string. It opens the given file in read mode. If file doesn't exist, it throws FileNotFoundException. |
| FileReader(File file) | It gets filename in file instance. It opens the given file in read mode. If file doesn't exist, it throws FileNotFoundException. |
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Methods of FileReader class
| Method | Description |
|---|---|
| int read() | It is used to return a character in ASCII form. It returns -1 at the end of file. |
| void close() | It is used to close the FileReader class. |
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Java FileReader Example
In this example, we are reading the data from the text file testout.txt using Java FileReader class.
Here, we are assuming that you have following data in 'testout.txt' file:
Output: