Download e-book for iPad: Advanced Java programming by Uttam Kumar Roy

By Uttam Kumar Roy

ISBN-10: 0199455503

ISBN-13: 9780199455508

Complicated Java Programming is a textbook particularly designed for undergraduate and postgraduate scholars of computing device technology, info expertise, and laptop functions (BE/BTech/BCA/ME/M.Tech/MCA). Divided into 3 components, the e-book presents an exhaustive assurance of themes taught in complicated Java and different comparable matters. It first introduces very important language beneficial properties equivalent to mirrored image, JNI, template, AWT and swing, safeguard and so on. the second one half essentially specializes in center community programming ideas reminiscent of sockets, RMI, Mail, XML-RPC and so on. The cutting-edge techniques corresponding to cleaning soap, Applet, Servlet, JSP, JDBC, Hibernate, JMS, J2EE, JNDI, CORBA, JSF and so on. were mentioned within the final half. The content material is stronger with a variety of illustrations, examples, application codes, and screenshots. With its lucid presentation and inclusion of diverse real-world examples and codes, the e-book should be both valuable for Java pros

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Finally { } Every try block may have at most one finally block. The following is illegal: try { //... 5 try-with-resources Statement The finally block, no doubt, provides a cleaner way to clean up resources. However, if we forget to close resources, we shall get runtime exceptions which are hard to debug. We might look into the entire program to make sure that all resources will get closed for all possible scenarios. Fortunately, Java 7 and later provides an even better mechanism known as try with resource statement.

The class Exception represents rest of the exceptional scenarios that applications can catch and handle. Usually, exceptions are categorized into two groups: checked exceptions and unchecked exceptions. 1 Checked Exceptions Checked exceptions are those that must be caught or declared to be thrown. Java considers Throwable and any of its subclass that is not also a subclass of either RuntimeException or Error as checked exceptions. Checked exceptions should be handled in the code to avoid compile time errors.

Another powerful feature of jcmd is that it allows us to control Java Flight Recordings (JFR) from command line. To do this JFR must be enabled by starting the application using the flags -XX:+UnlockCommercialFeatures -XX:+FlightRecorder to JVM as follows: java -XX:+UnlockCommercialFeatures -XX:+FlightRecorder LoopForEver We can see that JFR commands have been enabled by using jcmd. dump. start command is used to control how and when actual recording should happen. jfr This recording is identified by the name “test”, which is used by other JFR commands.

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Advanced Java programming by Uttam Kumar Roy

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