SQLException; import java. DriverManager; import java. Driver; import java. Connection; import sqlj. Then recompile and try again. In contrast, SQLJ separates queries from result-sets. Queries appear in program statements as SQLJ clauses. Result-sets are encapsulated in first-class iterator objects, which are strongly typed, and can be passed between SQLJ components that were translated and compiled at different times.
Those names are outside of the host-language namespace, and are localized to a single translation unit, because they vanish after translation. In contrast, SQLJ does not name individual queries or iterator objects, but instead relies on the naming mechanisms of Java to name the types of iterator objects, so that iterators can be passed among SQLJ components while preserving strong type checking.
END block is supported. We have also seen some concepts such as embedding sub programs like Procedures, Functions, and packages in SQLJ in this session. Going Over It Again 1. The replicated servers are not supported by RMI. We can implement any number of remote interfaces in our server class. The resources can be accessed from the remote server. In the next session we will see Applet programming. Object Java. Remote Java. RemoteObject Java.
RemoteObject interface extends Object and implements java. The applet is run on the client. The distributed garbage collection algorithm used by the RMI system is a reference-counting algorithm. We saw how to implement the RMI using Applet. It can be used to connect objects that are developed in any programming language, as long as an IDL stub for the objects can be furnished. The ORB typically generates these exceptions. The idl2java will generate the appropriate Java exception classes for both types of errors.
To take advantage of error handling, we must surround our code within try blocks and corresponding catch statements. It is better to handle all the possible exceptions that can come up. Applet Class: java. Applet Methods: public void java. AppletContext java. String java. AudioClip java. URL public java.
String public java. URL java. Image java. Locale java. String[][] java. URL public void java. String public void java. Dimension public final void java. AppletStub public void java. Exec Executes external programs from the Java runtime system. Exit Exits the Java runtime system. TotalMemory , freeMemory and gc Obtains information about their runtime system and control memory used by it. System; import java. Runtime; import java. In this session all the classes and their functions were dealt with an example.
In the middle of the session we had learnt about the SecurityMannager class and its usage and the Runtime class. Finally we covered Native method concepts. It must be added to our JDK directory for our use. These applets provide GUI controls that are used to browse and display managed objects. The HTTP servers are also used to distribute agent objects throughout the domains of the managed object servers. In the middle of the session we dealt with the clipboard mechanism and classes used for the clipboard mechanism.
At the end of this session the internationalization process was dealt with some formatting classes. DragEvent Occurs as a result of the dragging of an object.
ListDataEvent Occurs as a result of changes in the list selection. MenuEvent Occurs as the result of the posting, selection or canceling of a menu. TableModeEvent Occurs as the result of changes in the table. TreeModeEvent Occurs as the result of change in a tree model. TreeSelectionEvent Occurs as the result of a change in the tree selection.
Info Background Color of spot-help text. BeanInfo Gives information about the properties, events and methods of a bean. Customizer Allows the user to customize the beans using GUI. DesignMode Determines whether the bean is executing in design mode or not. PropertyChangeListener When a bound property is changed a method in this interface is invoked. PropertyEditor Objects that implement this interface allow the designer to change and display property values.
VetoableChangeListener When a constrained property is changed a method in this interface is invoked. Visibility Methods in this interface allow a Bean to execute in environments where a GUI is not available. Also allows us to associate a customizer with a Bean.
Beans Used to obtain information about a Bean. EventSetDescriptor Describes the event that can be generated by a Bean. IntrospectionException Generates an exception when we are analyzing a Bean. Introspector Analyzes a Bean and constructs a BeanInfo object.
MethodDescriptor Describes a Method of a Bean. PropertyDescriptor Describes a property of a Bean. PropertyEditorSupport Provides functionality that can be used when writing property editors. A IDE supports applets, application p and Beans development. Visual development tool for Beans. A Java development tool supports bean development. High rated visual development tool oriented around beans. Java development tool with beans development supports. Jbuilder Borland, Inc. Bean oriented Java development tools.
Super Mojo Penumbra Software, Inc. Java visual design tool supports beans. Application development tool and middleware. SuperCede SuperCede, Inc. Cost effective Java visual design tool. The download link is not updated. Book exceprts: The authors use Java APIs to construct an advanced business application, providing a look at development, testing, and deployment of an enterprise application.
They offer instruction on Java APIs and cover key elements like Enterprise JavaBeans technology, security, data and transaction management, performance tuning, debugging, distributed computing, database access, project swing, and native methods.
As an experienced developer on the JavaTM platform, you undoubtedly know how fast moving and comprehensive the platform is. Its many application programming interfaces APIs provide a wealth of functionality for all aspects of application and system-level programming. Real-world developers never use one or two APIs to solve a problem, but bring together key functionality spanning a number of APIs. To help you navigate the Java APIs and fast-track your project development time, this book includes the design, development, test, and deployment phases for an enterprise-worthy auction application.
While the example application does not cover every possible programming scenario, it explores many common situations and the discussions leave you with a solid methodology for designing and building your own solutions. This book is for developers with more than a beginning level of understanding of writing programs in the Java programming language.
The example application is written with the Java 2 platform APIs and explained in terms of functional hows and whys, so if you need help installing the Java platform, setting up your environment, or getting your first application to work, you should first read a more introductory book such as Essentials of the Java Programming Language: A Hands-On Guide Reviews: Amazon.
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