Java ReadAheadInputStream-class And Method Code Example
Here is an example of how you might use the ReadAheadInputStream class from the org.apache.commons.io package in Java:
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import org.apache.commons.io.input.ReadAheadInputStream;
public class MyClass {
public void doSomethingWithReadAheadInputStream() throws Exception {
// Create a byte array input stream
byte[] data = new byte[] {1, 2, 3, 4, 5};
InputStream inputStream = new ByteArrayInputStream(data);
// Create a read-ahead input stream
ReadAheadInputStream readAheadInputStream = new ReadAheadInputStream(inputStream);
// Read data from the read-ahead input stream
int value = readAheadInputStream.read();
while (value != -1) {
System.out.println(value);
value = readAheadInputStream.read();
}
}
}
The ReadAheadInputStream
class is a wrapper for an existing InputStream that reads ahead by a certain number of bytes in order to improve performance. In this example, we create a ByteArrayInputStream and pass it to the ReadAheadInputStream constructor and read data from it.
The ReadAheadInputStream
class also provides a mark(int readlimit) and reset() method, which allows you to mark a position in the stream and return to it later.
By default, ReadAheadInputStream
class will read ahead 512 bytes, but you can configure this by passing a different value to the constructor.