Java FileInputStream available() Method
Example
Get the number of bytes that are left to read, before and after reading one byte:
import java.io.FileInputStream;
import java.io.FileWriter;
import java.io.IOException;
public class Main {
public static void main(String[] args) throws IOException {
FileWriter myWriter = new FileWriter("filename.txt");
myWriter.write("Hello World");
myWriter.close();
FileInputStream input = new FileInputStream("filename.txt");
System.out.println(input.available());
input.read();
System.out.println(input.available());
input.close();
}
}Definition and Usage
The available() method returns the number of bytes that can be read from the stream right now, without waiting (blocking).
For a normal file, this is the number of bytes that are left to read. It gets smaller as you read from the file.
Syntax
public int available()Parameter Values
None.
Technical Details
| Returns: | The number of bytes that can be read without waiting, as an int. 0 at the end of the file. |
|---|---|
| Throws: | IOException - if the stream is closed, or if the file cannot be read. |
Related Pages
❮ FileInputStream Methods
