Improvements in I/O

• Asynchronous and/or polling I/O

• Memory mapped or otherwise buffered I/O

• printf() like formatting. For example,

  Formatter f = new Formatter(System.out);
f.fmt("%d bytes in %d seconds (%.2f KB/s)\n",
{ nbytes, seconds, ((double)(nbytes / 1024) / (double)seconds)) };

  This is currently illegal and requires a language change.

• Regular expressions

• More details about the file system and file types should be exposed through the Java API; for example, the file permissions and ownership info.

• More detailed IOExceptions