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WMA stands for Wireless Messaging API. The Java Community Process (JCP) defines it as JSR 120. It is based on the Generic Connection Framework (GCF). It defines interfaces and methods for sending and receiving both text and binary messages. The diagram below depicts the interfaces and sub... [read more..]
The prevFrame() method is a method of the Sprite class. It is used to choose the previous frame from a sequence of frames. The general syntax of this method is as follows: public void prevFrame() It has a void return type. Note: Frame sequences are thought to be circular. [read more..]
The getHeight() method is a method of the Displayable class. It returns an int value indicating the height (vertical displayable area) available to an application on the device. The value returned depends on following factors: Mobile device Use of ticker Use of commands Use of title The... [read more..]
The Canvas class extends the Displayable class. It provides various methods to handle game actions, key events, and pointer events. Developers use this class to develop game applications. Some of the methods of this class are as follows: showNotify() hideNotify() keyPressed() keyReleased() [read more..]
The getWidth() method is a method of the Displayable class. It returns an int value indicating the width (horizontal displayable area) available to an application on the device. The value returned depends on the following factors: Mobile device Use of ticker Use of commands Use of title... [read more..]
The RecordEnumeration interface provides methods to traverse through a set of records in a record store. It keeps the record Ids of the records in a record store. This interface is implemented by calling the enumerateRecords() method of the RecordStore class. Some of the methods of the... [read more..]
JAR stands for Java Archive. A file in JAR format contains the following mandatory attributes: MIDlet-Name: It specifies the name of the MIDlet suite packaged in the JAR file. MIDlet-Version: It specifies the version number of the MIDlet suite packaged in the JAR file. MIDlet-Vendor: It... [read more..]
J2ME stands for Java 2 Micro Edition. This platform of Java is used to develop applications for resource constraint devices such as mobile phones, PDAs, set top boxes, etc. The J2ME comprises three major components. These components are as follows: Configuration Profile Optional... [read more..]
The RecordListener interface notifies any changes made in the contents of a record store. These changes include addition, deletion, and modification. The RecordListener interface is implemented by the classes that need to be notified about such changes in a record store. The addRecordListener()... [read more..]
The openRecordStore() method creates or opens a RecordStore. This method takes four parameters: a String, two Boolean, and an Int. The general form of this method is as given below: RecordStore.openRecordStore(String "RecordStore name", boolean create, int authmode, boolean writable)... [read more..]
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