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1. Top results related to java programming for beginners

   • Programming with Java for beginners

     Top Answer

     Answered Apr 07, 2009 · 11 votes

     For someone that knows nothing about programming, just reading tutorials will not do it for you. It would be good to download an editor and actually write the programs with any tutorial you use.

     The thing about programming, the more you actually write the better you get at it.

     Other Answers

     Answered Apr 06, 2009 · 8 votes

     Grüß, Thomas, if you haven't learned any programming it may be a little hard to start, but the Sun Java Tutorials are a good place to start.

     Other Answers

     Answered Apr 06, 2009 · 5 votes

     Try the Java Tutorial. It will walk you through actual examples, with code that you can try out in various IDEs. I usually find that easier than reading a book.

     Check all answers on Stack Overflow

     1/5

   • Java tricks for competitive programming (for Java 8)

     Although the practice is the only way that ensures increased performance in programming contests but having some tricks up your sleeve ensures an upper edge and fast debugging. 1) Checking if the number is even or odd without using the % operator: Although this trick is not much better than using a % operator but is sometimes efficient (with large numbers).

     Use & operator:

     System.out.println((a & 1) == 0 ? "EVEN" : "ODD" );

     Example:

     num = 5 Binary: "101 & 1" will be 001, so false num = 4 Binary: "100 & 1" will be 000, so true.

     2) Fast Multiplication or Division by 2

     Multiplying by 2 means shifting all the bits to left and dividing by 2 means shifting to the right.

     Example: 2 (Binary 10): shifting left 4 (Binary 100) and right 1 (Binary 1)

     n = n << 1; // Multiply n with 2n = n >> 1; // Divide n by 2

     3) Swapping of 2 numbers using XOR:

     This method is fast and doesn’t require the use of the 3rd variable.

     // A quick way to swap a and ba b...

     • Arrays.sort() used to sort elements of an array.
     • Collections.sort() used to sort elements of a collection.
     • Arrays.binarySearch()(SET 1 | SET2) used to apply binary search on a sorted array.
     • Collections.binarySearch() used to apply binary search on a collection based on comparators.
     • Arrays.copyOf() and copyOfRange() copy the specified array.
     • Collections.copy() copies specified collection.

     Check all answers on Geeksforgeeks

     2/5

   • Java tricks for competitive programming (for Java 8)

     Although the practice is the only way that ensures increased performance in programming contests but having some tricks up your sleeve ensures an upper edge and fast debugging. 1) Checking if the number is even or odd without using the % operator: Although this trick is not much better than using a % operator but is sometimes efficient (with large numbers).

     Use & operator:

     System.out.println((a & 1) == 0 ? "EVEN" : "ODD" );

     Example:

     num = 5 Binary: "101 & 1" will be 001, so false num = 4 Binary: "100 & 1" will be 000, so true.

     2) Fast Multiplication or Division by 2

     Multiplying by 2 means shifting all the bits to left and dividing by 2 means shifting to the right.

     Example: 2 (Binary 10): shifting left 4 (Binary 100) and right 1 (Binary 1)

     n = n << 1; // Multiply n with 2n = n >> 1; // Divide n by 2

     3) Swapping of 2 numbers using XOR:

     This method is fast and doesn’t require the use of the 3rd variable.

     // A quick way to swap a and ba b...

     • Arrays.sort() used to sort elements of an array.
     • Collections.sort() used to sort elements of a collection.
     • Arrays.binarySearch()(SET 1 | SET2) used to apply binary search on a sorted array.
     • Collections.binarySearch() used to apply binary search on a collection based on comparators.
     • Arrays.copyOf() and copyOfRange() copy the specified array.
     • Collections.copy() copies specified collection.

     Check all answers on Geeksforgeeks

     3/5

   • Java tricks for competitive programming (for Java 8)

     Although the practice is the only way that ensures increased performance in programming contests but having some tricks up your sleeve ensures an upper edge and fast debugging. 1) Checking if the number is even or odd without using the % operator:  Although this trick is not much better than using a % operator but is sometimes efficient (with large numbers). 

     Use & operator:

     System.out.println((a & 1) == 0 ? "EVEN" : "ODD" );

     Example:

     num = 5 Binary: "101 & 1" will be 001, so false num = 4 Binary: "100 & 1" will be 000, so true.

     2) Fast Multiplication or Division by 2

     Multiplying by 2 means shifting all the bits to left and dividing by 2 means shifting to the right.

     Example: 2 (Binary 10): shifting left 4 (Binary 100) and right 1 (Binary 1)

     n = n << 1; // Multiply n with 2n = n >> 1; // Divide n by 2

     3) Swapping of 2 numbers using XOR: 

     This method is fast and doesn’t require the use of the 3rd variable.

     // A quick way to swap a and ba b...

     Check all answers on Geeksforgeeks

     4/5

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     5/5

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2. www.w3schools.com › javaJava Tutorial - W3Schools

   www.w3schools.com › java

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   Get certified by completing the JAVA course. Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.

3. www.youtube.com › watchJava Programming for Beginners – Full Course - YouTube

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   Sep 27, 2022 · Learn the Java programming language in this complete beginner's course. You will learn all the main features of Java (version 17) and how to use Java for you...

4. www.codecademy.com › learn › learn-javaLearn Java | Codecademy

   www.codecademy.com › learn › learn-java

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   Write your first Java program from scratch by introducing yourself to users and planting a tree for them. You'll practice creating a class, defining the main method, and organizing print statements. practice Project

5. www.youtube.com › watchJava Tutorial for Beginners - YouTube

   www.youtube.com › watch

   Jul 15, 2019 · Master Java with this beginner-friendly tutorial! ☕️ Build apps, websites, and start your coding journey.🚀 Ready for a deep dive? - Check out my complete c...

6. www.programiz.com › java-programmingLearn Java Programming

   www.programiz.com › java-programming

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   Beginner's Guide to Java. These tutorials will provide you with a solid foundation in Java and prepare you for the next steps in your career. Java Introduction. Get Started With Java. Your First Java Program. Java Comments. Java Fundamentals. Java Variables and Literals. Java Data Types (Primitive) Java Operators. Java Basic Input and Output.

7. www.guru99.com › javaJava Tutorial for Beginners: Learn Core Java Programming - Guru99

   www.guru99.com › java

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   Apr 29, 2024 · In this Java tutorial for beginners, you will learn Java programming basics like What is Java platform, JVM, how to install Java, OOPS concepts, variables, class, object, arrays, strings, command-line arguments, garbage collection, inheritance, polymorphism, interface, constructor, packages, etc.

8. www.codecademy.com › learn › java-introductionIntro to Java | Codecademy

   www.codecademy.com › learn › java-introduction

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   Ready to start your journey into the Java programming language? This course will walk you through understanding the program structure of a Java program, running your very first Java-based code, and storing data inside of a variable.