Old java textbook [closed] - java

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I have a textbook, "5th Edition Lewis and Loftus Java Software Solutions: Foundations of Program Design". The edition is from 2007. Can I use this to learn java, or is too outdated to be worth my time?

Java is always changing but not be very much. I have used that book for the newest version of java and some stuff doesn't work but for the most part you should be good. If something doesn't work in that book then simple just go onto google or some other search engine and check out the new way.
Best of Luck,
Dev

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is there a need to learn OOPS in java? [closed]

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I am a sophomore in college currently learning core java basics. Java is said to be an object oriented language but I don't see how the use of OOPS benefits the code bases especially the long ones in the industry.
SO I tried mugging the theory without understanding the applications behind it and it was kind of difficult so I don't know what to do now

Migration from java 8 to java 11 [closed]

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Is it recommended to migrate Java8 application to Java11? and why? do you find that there's a lot of interesting functionalities added to Java11 that are more performant than functionalities in Java8
Is it recommended to migrate Java8 application to Java11? and why?
Yes, because :
It is the latest free JDK release from Oracle under an open source license,
There are many bugs fixed in Java 11, read this
There are many new features, check here

Proguard alternative for obfuscating android apps using precompiled third party libraries [closed]

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I have tried ProGuard many times and spent a lot of time on configuring it to no avail in the past year or so. It seems to have some inherent limitations related to pre-compiled third-party libraries as explained in its document. ProGuard document nicely provides a long list of alternatives. Instead of trying them one by one, I am here to see if any could share successful experiences with some of them. I only need something to obfuscate java code. Code shrinking and optimization are nice to have, but not required.

Did Java FX2 fail? [closed]

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I am learning Java, and I am planning to develop a property management software for Windows.
I need to build the architecture for the program, and I am thinking of learning some technology for it.
I am considering Java FX 2.x, since I am also interested in web or mobile development.
However, there does not seem to be many Java FX 2.x books available at this time, while it has been quite a long time since JavaFX 2 has been released.
What is the problem? Is it not successful?
Also, is learning JavaFX 2.x recommended for me to develop the office software relatively easily?

Why are there many languages using JVM? [closed]

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I see a large list of programming languages here. What is the reason of using JVM and what are other options for a new programming language?
byte code can be run on any system with a JVM. If you are creating a new language, or porting an old one, all you need do is generate byte code (much simpler than optimal code for a real machine) and you are done.
Note: many of the JVM ports are faster if you use a JVM as well as much more work has gone into optimising the native code.

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