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2. What does the arrow operator, '->', do in Java? - Stack Overflow

   stackoverflow.com/questions/15146052

   1. The arrow operator is used to create lambda expressions, linking/separating parameters with the lambda body. syntax: (parameters) -> {expression}; It is also an efficient way of implementing functional interfaces like onClickListeners in java. answered Dec 2, 2022 at 10:09. hiro hamanda.

3. What is the meaning of "this" in Java? - Stack Overflow

   stackoverflow.com/questions/3728062

   this is a keyword in Java. Which can be used inside method or constructor of class. It (this) works as a reference to a current object whose method or constructor is being invoked. this keyword can be used to refer any member of current object from within an instance method or a constructor.

4. What is the Java ?: operator called and what does it do?

   stackoverflow.com/questions/798545

   Yes, it is a shorthand form of. count = getHereCount(index); count = getAwayCount(index); It's called the conditional operator. Many people (erroneously) call it the ternary operator, because it's the only ternary (three-argument) operator in Java, C, C++, and probably many other languages.

5. What is the percent % operator in java? - Stack Overflow

   stackoverflow.com/questions/43975824

   n%10 means the modulus of 10, that is the remainder you get when you divide with 10. Here it is used to get each digit. Example: Say your number is n = 752. n%10 = 2, n/10 = 75. So you add 2 to the sumDigits(75) Now, n%10 = 75%10 = 5. This is the digit to be added and so on, till your n >= 10. When it is < 10, you have a single digit that you ...

6. What is the difference between & and && in Java?

   stackoverflow.com/questions/5564410

   While && operator will stop evaluating the second argument if the first argument's result is false. One more difference between these two is, Bitwise & operator is applicable for boolean as well as integral types. While short-circuit && operator is applicable only for the boolean type. We can write.

7. What is the difference between == and equals () in Java?

   stackoverflow.com/questions/7520432

   Since java.lang.String class override equals method, It return true if two String object contains same content but == will only return true if two references are pointing to same object. Here is an example of comparing two Strings in Java for equality using == and equals() method which will clear some doubts:

8. In laymans terms, what does 'static' mean in Java?

   stackoverflow.com/questions/2649213

   The static keyword can be used in several different ways in Java and in almost all cases it is a modifier which means the thing it is modifying is usable without an enclosing object instance. Java is an object oriented language and by default most code that you write requires an instance of the object to be used. public class SomeObject {.

9. What does <T> (angle brackets) mean in Java? - Stack Overflow

   stackoverflow.com/questions/6607550

   195. <T> is a generic and can usually be read as "of type T". It depends on the type to the left of the <> what it actually means. I don't know what a Pool or PoolFactory is, but you also mention ArrayList<T>, which is a standard Java class, so I'll talk to that. Usually, you won't see "T" in there, you'll see another type.

10. Meaning of :: in Java syntax - Stack Overflow

    stackoverflow.com/questions/27015495

    39. :: is called Method Reference. It is basically a reference to a single method. i.e. it refers to an existing method by name. Method reference using :: is a convenience operator. Method reference is one of the features belonging to Java lambda expressions. Method reference can be expressed using the usual lambda expression syntax format ...

11. What are the -Xms and -Xmx parameters when starting JVM?

    stackoverflow.com/questions/14763079

    The flag Xmx specifies the maximum memory allocation pool for a Java Virtual Machine (JVM), while Xms specifies the initial memory allocation pool. This means that your JVM will be started with Xms amount of memory and will be able to use a maximum of Xmx amount of memory. For example, starting a JVM like below will start it with 256 MB of ...