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1. Top results related to how long does it take to work in a library in java

   • How long does it take for the OS to close the socket after calling close() method in java?

     Top Answer

     Answered Feb 18, 2012 · 3 votes

     It can take quite a while (e.g. up to 3 minutes if there is unsent data)

     In your case you are using a different local port (same remote port doesn't matter) each time so it shouldn't matter.

     BTW: Creating a new connection is pretty expensive, I would try to re-use a connection rather than opening a new one each time. In the example above it could be as much as 1000x faster. ;)

     Check all answers on Stack Overflow

     1/5

   • How Long Does it Take to Learn Java for a Complete Newbie?

     Top Answer

     Answered May 14, 2009 · 56 votes

     10 weeks? Apparently you can do it in 24 hours!

     http://www.amazon.com/Sams-Teach-Yourself-Programming-Hours/dp/0672328445

     EDIT:

     Okay, so only 1 person found my answer amusing, but not amusing enough to upvote. The real question is how good do you need to be in 10 weeks?

     If you get yourself a good book (the one linked above has some good reviews on Amazon), then in 10 weeks you might be proficient enough to do something useful in Java, but it takes years to become expert. Any time spent between 10 weeks and several years will move you from beginner towards expert.

     Oh and read Teach Yourself Programming in Ten Years.

     Other Answers

     Answered May 14, 2009 · 30 votes

     OK, based on some of the previous answers, I am expecting to get downvoted for this, but, I think you are delusional to think you can learn, on your own, how to program in Java in 10 weeks with no programming background. No person, with NO programming experience, other than some sort of prodigy, is going to learn to program in Java or almost any language in 10 weeks.

     For clarity, copying and running hello world from a book does not make you a programmer. Hell, it will most likely take days just to get that working in some IDE.

     Now, can you study and potentially pass some test? Maybe, but that depends on the depth and format of the test.

     If I asked if I could become a doctor in 10 weeks, I would get laughed at for asking, so I am somewhat surprised at the answers that indicate that it is somewhat possible. I can stick a bandaid on my daughter now, but it hardly makes me a medical professional, it just means I managed their version of hello world.

     Other Answers

     Answered May 14, 2009 · 24 votes

     The main question is whether you've done any programming in the past since that may be the main effort. I would suspect that if you had not, you could get by but not necessarily do well. You indicate that you didn't have any programming experience, so this is where you are going to have most problems and spend most of your time. Java would not necessarily be faster or slower to learn than other similar languages.

     Sun's Java tutorials are great, but unfortunately programming is one of the things where practice is necessary, and that depends on your free time. It's also necessary to stop and practice frequently rather than after reading half a book. If you devoted 10 weeks full time to it - yes, it's quite doable for some people. After all, college students become passable developers in one academic year where they take other unrelated courses.

     I would focus on figuring out Java fully first without trying for J2ME. Then you can make the switch.

     In addition, realize that there's a big difference between the language and the standard library. The important thing is to learn the language. There are certain standard library calls that everyone uses and are critical to learn, but they're not part of the language. However, you'll never really know the entire library (Though you'll learn from exprience). It's more important to learn how to find the functionality that you're looking for then to know exactly what it is or where to find it. The important thing is to avoid reinventing the wheel.

     Also, realize that you may only be a passable developer at the end. Experience takes time and often can't be hastened.

     In addition, even if you learn to program you will miss some of the critical general CS knowledge like data structures and algorithms. Programming books rarely teach that, you will have to learn that yourself (see, for example, the TopCoder tutorials).

     Check all answers on Stack Overflow

     2/5

   • How does long to int cast work in Java?

     Top Answer

     Answered Sep 19, 2012 · 41 votes

     The low 32 bits of the long are taken and put into the int.

     Here's the math, though:

     • Treat negative long values as 2^64 plus that value. So -1 is treated as 2^64 - 1. (This is the unsigned 64-bit value, and it's how the value is actually represented in binary.)
     • Take the result and mod by 2^32. (This is the unsigned 32-bit value.)
     • If the result is >= 2^31, subtract 2^32. (This is the signed 32-bit value, the Java int.)

     Check all answers on Stack Overflow

     3/5

   • in Java, how to traverse a queue without destroying it, in a simple way?

     Top Answer

     Answered May 07, 2013 · 9 votes

     for (Sample s : history) doStuff(s);-

     This is called the enhanced for-loop; you can read more about it here.

     Check all answers on Stack Overflow

     4/5

   • Java:how much does a "long" number take in memory?

     Top Answer

     Answered Jul 30, 2013 · 5 votes

     Yes the size is fixed as per the language specification:

     The integral types are byte, short, int, and long, whose values are 8-bit, 16-bit, 32-bit and 64-bit signed two's-complement integers, respectively [...].

     Other Answers

     Answered May 14, 2009 · 30 votes

     OK, based on some of the previous answers, I am expecting to get downvoted for this, but, I think you are delusional to think you can learn, on your own, how to program in Java in 10 weeks with no programming background. No person, with NO programming experience, other than some sort of prodigy, is going to learn to program in Java or almost any language in 10 weeks.

     For clarity, copying and running hello world from a book does not make you a programmer. Hell, it will most likely take days just to get that working in some IDE.

     Now, can you study and potentially pass some test? Maybe, but that depends on the depth and format of the test.

     If I asked if I could become a doctor in 10 weeks, I would get laughed at for asking, so I am somewhat surprised at the answers that indicate that it is somewhat possible. I can stick a bandaid on my daughter now, but it hardly makes me a medical professional, it just means I managed their version of hello world.

     Other Answers

     Answered May 14, 2009 · 24 votes

     The main question is whether you've done any programming in the past since that may be the main effort. I would suspect that if you had not, you could get by but not necessarily do well. You indicate that you didn't have any programming experience, so this is where you are going to have most problems and spend most of your time. Java would not necessarily be faster or slower to learn than other similar languages.

     Sun's Java tutorials are great, but unfortunately programming is one of the things where practice is necessary, and that depends on your free time. It's also necessary to stop and practice frequently rather than after reading half a book. If you devoted 10 weeks full time to it - yes, it's quite doable for some people. After all, college students become passable developers in one academic year where they take other unrelated courses.

     I would focus on figuring out Java fully first without trying for J2ME. Then you can make the switch.

     In addition, realize that there's a big difference between the language and the standard library. The important thing is to learn the language. There are certain standard library calls that everyone uses and are critical to learn, but they're not part of the language. However, you'll never really know the entire library (Though you'll learn from exprience). It's more important to learn how to find the functionality that you're looking for then to know exactly what it is or where to find it. The important thing is to avoid reinventing the wheel.

     Also, realize that you may only be a passable developer at the end. Experience takes time and often can't be hastened.

     In addition, even if you learn to program you will miss some of the critical general CS knowledge like data structures and algorithms. Programming books rarely teach that, you will have to learn that yourself (see, for example, the TopCoder tutorials).

     Check all answers on Stack Overflow

     5/5

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2. happycoding.io › tutorials › javaLibraries - Happy Coding

   happycoding.io › tutorials › java

   • Cached

   Apr 10, 2017 · Put together small programs that test out your assumptions and isolate questions you have. Break your problem down into smaller steps, and then take on those steps one at a time. To use a library, you have to add it to your classpath, which you pass into the javac and java commands using the -cp argument.

3. www.oracle.com › corporate › featuresBest Practices for Designing and Implementing a Library in Java

   www.oracle.com › corporate › features

   • Cached

   A library generally sits at the bottom of an application. As such, it needs to be reliable and of high quality. When the application calls a library method, the application needs to be certain that the library will do what is asked of it. It turns out that the best way to arrange this is to use good, modern API design for the library.

4. People also ask

   How long does it take to learn Java?

   • No person, with NO programming experience, other than some sort of prodigy, is going to learn to program in Java or almost any language in 10 weeks. For clarity, copying and running hello world from a book does not make you a programmer. Hell, it will most likely take days just to get that working in some IDE.

   How Long Does it Take to Learn Java for a Complete Newbie?

   stackoverflow.com/questions/864640/how-long-does-it-take-to-learn-java-for-a-complete-newbie

   See all results for this question

   What is the Java library?

   • In this article, we will review the following concepts in general terms: In real life, whenever you go to a library, you see a huge number of books and they are divided into different sections: history, mathematics, chemistry, sociology, etc. These books can answer any questions you may have.

   What is the Java Library? • Vertex Academy

   vertex-academy.com/tutorials/en/what-is-java-library/

   See all results for this question

   Why do we need a Java library?

   • Java is one of the pillars of the open-source world. Almost every Java project uses other open-source projects since no one wants to reinvent the wheel. However, many times it happens that we need a library for its functionality but we have no clue how to use it. We run into things like: What is it with all these “*Service” classes?

   Designing a User Friendly Java Library | Baeldung

   www.baeldung.com/design-a-user-friendly-java-library

   See all results for this question

   How do I use a library in Java?

   • To use a library, you have to add it to your classpath, which you pass into the javac and java commands using the -cp argument. As long as you do that, you can use classes from a library exactly like you can use a regular Java class or a class that you create- they’re all just Java classes. You can also mix libraries together!

   Libraries - Happy Coding

   happycoding.io/tutorials/java/libraries

   See all results for this question

5. stackoverflow.com › questions › 849813Large Numbers in Java - Stack Overflow

   stackoverflow.com › questions › 849813

   • Cached

   long time = System.nanoTime() - start; System.out.println(place + "th fib # is: " + fibNumber); System.out.printf("Time to compute: %5.1f seconds.%n", time / 1.0e9); private static BigInteger fib(int place) {. BigInteger a = new BigInteger("0"); BigInteger b = new BigInteger("1"); while (place-- > 1) {.

   Code sample

   BigInteger reallyBig = new BigInteger("1234567890123456890");

   BigInteger notSoBig = new BigInteger("2743561234");

   reallyBig = reallyBig.add(notSoBig);

   See more on stackoverflow

6. www.baeldung.com › design-a-user-friendly-java-libraryDesigning a User Friendly Java Library | Baeldung

   www.baeldung.com › design-a-user-friendly-java-library

   • Cached

   Sep 21, 2023 · Designing a User Friendly Java Library. 1. Overview. Java is one of the pillars of the open-source world. Almost every Java project uses other open-source projects since no one wants to reinvent the wheel. However, many times it happens that we need a library for its functionality but we have no clue how to use it.

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8. vertex-academy.com › tutorials › enWhat is the Java Library? • Vertex Academy

   vertex-academy.com › tutorials › en

   • Cached

   Aug 5, 2016 · August 5, 2016 Vertex Academy. In this article, we will review the following concepts in general terms: the Java Library. packages in Java. classes. methods. In real life, whenever you go to a library, you see a huge number of books and they are divided into different sections: history, mathematics, chemistry, sociology, etc.

9. codegym.cc › how-long-does-it-take-to-learn-javaHow long does it take to learn Java? - CodeGym

   codegym.cc › how-long-does-it-take-to-learn-java

   • Cached

   May 26, 2022 · The learning of Java mission is definitely possible to complete in 3 to 12 months, however, there are many nuances that we will discuss in this article. Here we’ll try to answer the question “how to learn Java fast” as well. How do we look for the answer The question “how long does it take to learn Java” is kind of tricky.

10. docs.oracle.com › en › javaJava Core Libraries - Oracle Help Center

    docs.oracle.com › en › java

    1 Java Core Libraries. The core libraries consist of classes which are used by many portions of the JDK. They include functionality which is close to the VM and is not explicitly included in other areas, such as security. Here you will find current information that will help you use some of the core libraries.