Quick Answer: What Does II Mean In Java?

What does \\ s+ mean in Java?

The Difference Between \s and \s+ The plus sign + is a greedy quantifier, which means one or more times.

For example, expression X+ matches one or more X characters.

Therefore, the regular expression \s matches a single whitespace character, while \s+ will match one or more whitespace characters..

Can you use += in Java?

As long as x and y are of the same type (for example, both are int s), you may consider the two statements equivalent. However, in Java, x += y is not identical to x = x + y in general. += performs an implicit cast, whereas for + you need to explicitly cast the second operand, otherwise you’d get a compiler error.

What does 4 mean in math?

Example: 4! is shorthand for 4 × 3 × 2 × 1. The factorial function (symbol: !) says to multiply all whole numbers from our chosen number down to 1.

What does :: mean in Java?

Method Reference:: 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.

What does * mean in regular expression?

Using Regular Expressions in Custom Sites The meaning of the asterisk ( * ) depends on its use. In regular expressions, the asterisk is a metacharacter for zero or more instances of the preceding character. Without regular expressions, the asterisk is a wildcard, for zero or more instances of any character.

What is Java class syntax?

In object-oriented programming, a class is an extensible program-code-template for creating objects, providing initial values for state (member variables) and implementations of behavior (member functions or methods).

What is the use of colon in Java?

The colon is a shortcut for iterating over a collection. The variable on the left of the colon is a temporary variable containing a single element from the collection on the right. With each iteration through the loop, Java pulls the next element from the collection and assigns it to the temp variable.

What is data type in Java?

Data type specifies the size and type of values that can be stored in an identifier. … Data types in Java are classified into two types: Primitive—which include Integer, Character, Boolean, and Floating Point. Non-primitive—which include Classes, Interfaces, and Arrays.

What does a zA z0 9 mean?

The bracketed characters [a-zA-Z0-9] mean that any letter (regardless of case) or digit will match. … The _ (underscore) character in the regular expression means that the zone name must have an underscore immediately following the alphanumeric string matched by the preceding brackets.

What does || stand for?

Logical OR operatorLogical OR operator: || The logical OR operator ( || ) returns the boolean value true if either or both operands is true and returns false otherwise. … The operands to the logical OR operator don’t have to have the same type, but they must be of boolean, integral, or pointer type.

What does 3 mean in math?

In mathematics, symbols that have certain meanings in the English language can mean very specialized and different things. … In mathematics, the expression 3! is read as “three factorial” and is really a shorthand way to denote the multiplication of several consecutive whole numbers.

What Is percent sign in Java?

In general, Percent sign(%) acts as a modulus operator in java programming language. Modulus operator is an operator that works on integers and yields the remainder when one number is divided by another. Thus x = A%B means that x will carry the value of the remainder when dividing A by B.

What does || mean in Java?

|| operator in Java || is a type of Logical Operator and is read as “OR OR” or “Logical OR“. This operator is used to perform “logical OR” operation, i.e. the function similar to OR gate in digital electronics.

What does * do in regex?

The . * in each lookahead causes it to initially gobble up the whole string, then backtrack, giving back one character at a time until it reaches a spot where the \d or \W can match. That’s how they can match the digit and the special character anywhere in the string.

Is used in Java for?

The this keyword refers to the current object in a method or constructor. The most common use of the this keyword is to eliminate the confusion between class attributes and parameters with the same name (because a class attribute is shadowed by a method or constructor parameter).

What is print () in Java?

print(): print() method in Java is used to display a text on the console. This text is passed as the parameter to this method in the form of String. This method prints the text on the console and the cursor remains at the end of the text at the console.

What is the full from of BS?

BSC Full Form Bachelor of Science – BSc is a 3 year undergraduate degree course awarded in the field of science and technology.