J2ME in a Nutshell phần 3 pot
J2ME in a Nutshell phần 3 pot
... display) a Canvas from which the attribute
values are obtained, as shown in Example 5-1.
Example 5-1. Getting Display and Canvas Attributes for a Device
package ora.ch5;
import javax.microedition.lcdui.Canvas; ... LAYOUT_CENTER. Because LAYOUT_DEFAULT has
value 0, a layout value of LAYOUT_NEWLINE_BEFORE is equivalent to
LAYOUT_NEWLINE_BEFORE | LAYOUT_DEFAULT.
As a shorthand...
J2ME in a Nutshell phần 4 pot
...
6 .3. 1 Sending a Datagram
To send a datagram, you have to obtain a Datagram object, populate it with the data to be
sent, and invoke the send( ) method. The DatagramConnection interface has ... following methods:
public void drawArc(int x, int y, int width, int height, int startAngle,
int arcAngle)
J2ME in a Nutshell
185
data until it has enough to satisfy the applicati...
J2ME in a Nutshell phần 5 pot
... packages are provided:
java.io (but not LineNumberInputStream and StringBufferInputStream, which are
deprecated in J2SE)
java.lang
java.lang.ref
java.lang.reflect
java.math
java.net
java.security ...
java.security.acl
java.security.cert
java.security.interfaces
java.security.spec
java.text
java.util
java.util.jar
java.util.zip
J2ME in a Nutshell
221
Figure 6-5. A...
J2ME in a Nutshell phần 1 ppt
... Writer
32 5
32 5
32 5
32 7
32 7
32 8
32 9
33 0
33 1
33 2
33 3
33 4
33 4
33 5
33 6
33 7
33 8
33 9
33 9
33 9
12.
j
ava.lan
g
Package java.lang
ArithmeticException
ArrayIndexOutOfBoundsException
ArrayStoreException ... Package Contents
30 8
30 8
30 9
31 0
11. java.io
Package java.io
ByteArrayInputStream
ByteArrayOutputStream
DataInput
DataInputStre...
J2ME in a Nutshell phần 2 pptx
... therefore share the same instances of all Java classes and other resources loaded
into the Java VM. Among other things, this means that data can be shared between
MIDlets, and the usual Java synchronization ...
904 JAR size mismatch
905 Attribute mismatch
906 Invalid descriptor
J2ME in a Nutshell
54
Table 3- 2. MIDlet Packaging Attributes
Attribute Name JAR JAD Value and Mean...
J2ME in a Nutshell phần 6 ppt
... creator ID is not being
assigned, the type is given as Data.
java -cp Converter.jar com.sun.midp.palm.database.MakeMIDPApp -jad
Chapter3.jad -o Chapter3.prc -creator ORA3 -name "Ch 3& quot; ... the Output window, but their content can be saved in a file or
J2ME in a Nutshell
30 3
constant
An implementation-specific flag that indicates that a method has a trivial
i...
J2ME in a Nutshell phần 7 pps
...
}
Subclasses
ByteArrayInputStream, DataInputStream
Passed To
DataInputStream.DataInputStream(), InputStreamReader.InputStreamReader()
Returned By
Class.getResourceAsStream(),
javax.microedition.io.Connector.openInputStream(), ...
InputStreamReader.
J2ME in a Nutshell
35 3
The static variables Integer.MIN_VALUE and Integer.MAX_VALUE are int (not Integer)
values that rep...
J2ME in a Nutshell phần 8 docx
... is assumed. A
String can also be created by applying the static
valueOf() methods to a boolean, a char, an array of characters (char[]), an int, a long or
an arbitrary Java Object. With an ... Datagram newDatagram(
int size) throws java.io.IOException;
public abstract Datagram newDatagram(byte[] buf,
int size) throws java.io.IOException;
public abstract Datagram newDatagram...
J2ME in a Nutshell phần 9 doc
...
javax.microedition.io
DataInput:
java.io
DataInputStream:
java.io
DataOutput:
java.io
DataOutputStream:
java.io
Date:
java.util
DATE:
Calendar, DateField
DATE_TIME:
DateField
DateField: ...
rec1 and rec2 is converted to DataInputStreams like this:
DataInputStream dis1 = new DataInputStream(new ByteArrayInputStream(rec1));
DataInputStream dis2 = new DataInput...
J2ME in a Nutshell phần 10 pptx
...
J2ME in a Nutshell
498
Reader:
java.io
readFully():
DataInput, DataInputStream
readInt():
DataInput, DataInputStream
readLong():
DataInput, DataInputStream
readShort():
DataInput, ...
DataInput, DataInputStream
readUnsignedByte():
DataInput, DataInputStream
readUnsignedShort():
DataInput, DataInputStream
readUTF():
DataInput, DataInputStream
ready():...
Từ khóa: