Download Advanced Java programming by Uttam Kumar Roy PDF

By Uttam Kumar Roy

ISBN-10: 0199455503

ISBN-13: 9780199455508

Complicated Java Programming is a textbook in particular designed for undergraduate and postgraduate scholars of computing device technological know-how, details know-how, and laptop functions (BE/BTech/BCA/ME/M.Tech/MCA). Divided into 3 elements, the booklet offers an exhaustive insurance of subject matters taught in complex Java and different similar matters. It first introduces very important language positive aspects corresponding to mirrored image, JNI, template, AWT and swing, defense and so forth. the second one half essentially makes a speciality of middle community programming innovations reminiscent of sockets, RMI, Mail, XML-RPC and so forth. The cutting-edge ideas equivalent 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 superior with a number of illustrations, examples, application codes, and screenshots. With its lucid presentation and inclusion of various real-world examples and codes, the booklet can be both helpful for Java execs

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3 AN EXAMPLE Let us now apply this mechanism to our division example. Since, the division operation may throw an exception, we guard it using a try block as follows: try { result = 100/d; } If the value of d is zero, an exception occurs during the division operation. The JVM creates an object representing the exception and throws the object which essentially disrupts the normal control of execution and places it just after the try block. The JVM then looks for an appropriate catch block that can hold the object thrown.

The web server supports a few pre-designed queries as well as custom queries written in OQL (Object Query Language), which is a language similar to SQL to query heap dumps. Java comes with a command line, interactive, runtime debugger known as jdb which is a very useful tool to debug Java code. The jdb tool allows us to query to a JVM and displays information. The jar tool can bundle multiple files into a single one and vice versa. It use ZIP file format. So, in addition to bundling a set of files into a single one, we can use it for compressing and decompressing files.

The following example uses a try-catch block: void g() { try { f(); } catch(Exception e) { //... } } It is useful if g() knows what exactly it should do if f() throws an exception. Otherwise, g() may re-specify it using a separate throws clause as follows: void g() throws Exception { f(); } It is also possible to handle the Exception using a try-catch block and still declare it to be thrown as follows: void g() throws Exception { try { f(); } catch(Exception e) { //take actions... throw e; } } In this case, g() takes necessary steps in the catch block as far as it can and re-throws the caught exception expecting that some code else will handle it completely.

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