After it offers gotten the new lock, the thread enters brand new stop away from protected code
21. Using JNI we can phone call qualities that are written in almost every other languages regarding Java. After the is their benefits and drawbacks: Advantages: You want to make use of present collection that has been in earlier times composed in other language. We would like to telephone call Screen API setting. In the interests of delivery rates. We wish to phone call API intent behind some machine product which is within c otherwise c++ off java consumer.
Disadvantages: You simply can’t say create once run everywhere. Tough to debug runtime mistake from inside the local code. Possible threat to security. You can not call it away from Applet.
What’s JNI ?
23. What exactly is JFC ? Coffees Basis Classes include: Standard AWT step one.step one Accessibility software Smaller section: which are user interface section that do not subclass an existing AWT user interface feature. They don’t use local interface points due to the fact provided by the fresh root windowing program. Because of this he is less restrictive than just important AWT elements. Coffee feel and look Service to own native appearance and feel Characteristics such as Java2D and you will Drag and you may Drop
twenty four. What is Difference in AWT and you may Swing ? Swing will bring a richer group of elements than AWT. He is a hundred% Java-dependent. AWT additionally was created to your attitude that if chicas escort Odessa TX an element otherwise capacity for an element weren’t available using one system, it wouldn’t be on any program. Because of the peer-dependent character of AWT, what might work on one implementation may well not run other, since the fellow-integration may possibly not be once the strong. There are most other benefits to Swing over AWT: Move will bring both a lot more portion and you can extra functionality to help you AWT-substitute for section Swing components changes their looks in accordance with the most recent “feel and look” library that’s being used. Move elements proceed with the Design-View-Controller (MVC) paradigm, meaning that offer an even more versatile UI. Move brings “extras” to own portion, instance: Symbols towards of several elements Attractive limits getting portion Equipment suggestions for section Swing areas try smaller (smaller resource intensive than simply AWT) Swing provides established-within the double buffering Swing will bring paint debugging assistance to own when you make your own portion Swing also offers several drawbacks: It needs Coffees 2 or a unique Jar document If you are not too careful whenever coding, it may be more sluggish than simply AWT (all of the portion was drawn) Swing areas appear particularly native portion may well not operate just eg indigenous components
twenty five. Offered notepad/Ie or other procedure as processes, What goes on for those who initiate notepad otherwise Internet explorer 3 x? Where step 3 process are already been or step 3 threads try started ? 3 separate process try come.
twenty six. How come thread synchronization happens to the a display ? [Concern not too obvious in my opinion ] The latest JVM spends tresses alongside checks. A display screen is simply a protector in that it watches over a sequence off code, ensuring that singular thread at a time does new password. For each screen try in the an object site. When a thread gets to the first education in an effective block regarding code it will see a great secure into the referenced target. This new bond is not permitted to play the newest code up to they receives brand new lock. In the event the bond will leave the fresh cut off, in spite of how it renders the fresh new take off, they releases the secure towards relevant target.
twenty-seven. How do you phone call an Applet playing with a java Program function ? Similar to this: document.appletName.methodCall(. ) Does not work with Web browser whether or not
twenty eight. Will there be any tag within the HTML to help you upload and you may download data ? I’m not conscious of HTML tags to simply help myself publish a document, we could possibly certianly require some servers front side scripting so you’re able to procedure that. We are able to certainly play with HTML to include a download hyperlink because the follows: code: Click so you’re able to obtain
