When 8K of data is requested gcj returns only 2K (Sun's VM returns full 8K).

example code:

import java.io.*;

public class BufferedReaderReadTest {
	public static void main( String [] args ) throws Exception {

		char [] b = new char[ 8 * 1024 ];

		BufferedReader in = new BufferedReader( new FileReader( args
[0] ), 8 * 1024 );

		System.out.println( "read() = " + in.read( b, 0, b.length ) );

		in.close();
	}
}