What does this " ?: " mean in java

Question

: or ?: or !: is it equal = ?

Answer 1

• The ternary operator:

   condition ? value if true : value if false

Here’s what you need to know:
➝ The "condition" is what you’re actually testing. The result of your condition should be 'true' or 'false' or at least coerce to either boolean value.

➝ A ' ? ' separates our conditional from our 'true' value. Anything between the ' ? ' and the ' : ' is what is executed if the "condition" evaluates to 'true'.

➝ Finally a ' : ' colon. If your condition evaluates to 'false', any code after the colon is executed.

Answer 2

▪The  ?:  operator in Java

The value of a variable often depends on whether a particular boolean expression is or is not true and on nothing else. For instance one common operation is setting the value of a variable to the maximum of two quantities. In Java you might write:

  if ( a > b ) {
      max = a;
  } else {
      max = b;
  }

Setting a single variable to one of two states based on a single condition is such a common use of 'if-else' that a shortcut has been devised for it, the conditional operator ?:

Using the conditional operator you can rewrite the above example in a single line like this:

    max = ( a > b ) ? a : b;

( a > b ) ? a : b;  is an expression which returns one of two values, a or b.

      The condition, ( a > b ), is tested.
  • If it is 'true' the first value, a, is returned.
  • If it is 'false' , the second value, b, is returned.

Whichever value is returned is dependent on the conditional test, a > b. The condition can be any expression which returns a boolean value.

Answer 3

Does Java support the Elvis operator?

https://en.m.wikipedia.org/wiki/Elvis_operator

That's what `?:` is in C#.

Based on this link, I suppose not.

https://stackoverflow.com/questions/52285813/how-to-implement-the-elvis-operator-in-java-8

In that case, it's likely the ternary operator:

(condition) ? (value if true) : (value if false)

Answer 4

It is the ternary operator

Answer 5

David Carroll its hard for me O.O, can u explain in statement of If...else keyword?

Answer 6

Jay Matthews can u create more examples,btw thank you so much

Answer 7

Jay Matthews The tittle is min of 4 numbers mean minimum 4 numbers to do that?
and what is the <<end1 mean in the code