Shrinking Java to Fit - Beginning Java ME Platform - page 28

Changes to Timer Behavior

Although not part of the CLDC proper, it's worth calling out the Timer and TimerTask
classes here, as they're the only MIDP classes in the java.util hierarchy. Drawn from Java
SE, the Timer class lets you schedule a TimerTask to be performed at some time in the
future. As with Java SE, simply subclass TimerTask overriding run , and then use a Timer
instance to schedule the operation. Of course, your MIDlet must be running; for back-
ground wake-up behavior, consider using an alarm (see the “Managing Startup Events
and Alarms” section in Chapter 4).

Changes to the java.io Package

Table 2-4 lists the supported classes in the java.io package.

Table 2-4. java.io Classes Supported by CLDC Version

CLDC 1.0 CLDC 1.1

ByteArrayInputStream ByteArrayInputStream

ByteArrayOutputStream ByteArrayOutputStream

DataInput DataInput (interface)

DataInputStream DataInputStream

DataOutput DataOutput (interface)

DataOutputStream DataOutputStream

EOFException EOFException

InputStream InputStream

InputStreamReader InputStreamReader

InterruptedIOException InterruptedIOException

IOException IOException

OutputStream OutputStream

OutputStreamWriter OutputStreamWriter

PrintStream PrintStream

Reader Reader

UnsupportedEncodingException UnsupportedEncodingException

UTFDataFormatException UTFDataFormatException

Writer Writer