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The deleteRecord() method is a method of the RecordStore class. It is used to delete a record from a given record store. The general syntax of this method is as follows: public void deleteRecord(int recordid) Here, the recordid parameter identifies the record to be deleted. [read more..]
The getNumRecords() method is a method of the RecordStore class. It is used to get information about the total number of records available in the current record store. The general syntax of this method is as follows: public int getNumRecords() [read more..]
The DateField class allows a user to display and edit the values of date and time. The instance of this class is placed on a form. It has the following two constructors: DateField(String label, int mode) : This creates an instance with a specified label and mode. DateField(String label,... [read more..]
The setPriority() method is a method of the Thread class. This method is used to change the priority of a thread. The general syntax of this method is as follows: public final void setPriority(int p) The p parameter specifies the priority of a thread. If the specified priority is not... [read more..]
The createImage() method is used to display an immutable image by creating an instance of the Image class. This method takes one parameter, i.e., the name of the file having the image. The syntax below creates an instance of the Image class: Image img= Image.createImage("hello.png");... [read more..]
The Alert class is a subclass of the Screen class. It provides user interface. The main function of the Alert class is to inform a user about any errors or exceptions. It has the following two constructors: Alert(String Title) : It creates an empty Alert instance with a specified label or... [read more..]
The AlertType class extends the Object class. It provides information about the types of alerts. It has the following predefined constants: WARNING: It alerts a user about the consequences of performing a dangerous operation. For example, "Performing this action will remove data from the... [read more..]
The ImageItem constants, defined by the ImageItem class, specify the layout of the image created. These constants are listed below with their description: LAYOUT_DEFAULT: It uses the device's default layout. LAYOUT_LEFT: It aligns the specified image to the left margin of the display.... [read more..]
The addRecord() method is a method of the RecordStore class. This method is used to insert a new record in a specified record store. The general syntax of this record store is as follows: public int addRecord(byte[] data, int offset, int numbytes) The data parameter specifies the data to... [read more..]
The setRecord() method is a method of the RecordStore class. This method is used to modify a specified record. The general syntax of this method is as follows: public void setRecord(int recordid, byte[] newdata, int offset, int numbytes) The recordid parameter specifies the record ID... [read more..]
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