日期:2014-05-16 浏览次数:20461 次
import java.io.FileNotFoundException; import java.io.IOException; import java.io.RandomAccessFile; import java.nio.MappedByteBuffer; import java.nio.channels.FileChannel; public class LargeMappedFiles { static int length = 0x8FFFFFF;//128M public static void main(String[] args) { try { MappedByteBuffer out = new RandomAccessFile("test.txt", "rw").getChannel().map(FileChannel.MapMode.READ_WRITE, 0, length); for(int i = 0 ; i < length ; i ++){ out.put((byte)i); } System.out.println("Finished writing"); for(int i = length/2 ; i < length/2 + 6 ; i ++){ System.out.println((char)out.get(i)); } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } }?