Java Ternary Operator
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The Java ternary operator
functions like a simplifiedJava if statement.
The ternary operator consists of a condition that evaluates to either true
or false
,
plus a value that is returned if the condition is true
and another value that is returned if
the condition is false
. Here is a simple Java ternary operator example:
String name = case.equals("uppercase") ? "JOHN" : "john";
We will dissect this ternary operator example in the rest of this Java ternary operator tutorial.
Ternary Operator Condition
The ternary operator part of the above statement is this part:
case.equals("uppercase") ? "JOHN" : "john"
The condition part of the above ternary operator expression is this part:
case.equals("uppercase")
The condition is a Java expression that evaluates to either true
or false
.
The above condition will evaluate to true
if the case
variable equals
theJava String value uppercase
, and to false
if not.
The condition can be any Java expression that evaluates to a boolean
value, just like
the expressions you can use inside an if
- statement or while
loop.
Ternary Operator Values
The condition part of a ternary operator is followed by a question mark ( ?
). After the question
mark are the two values the ternary operator can return, separated by a colon ( :
). The values
part of the ternary operator shown earlier is:
"JOHN" : "john";
The values part consists of two values. The first value is returned if the condition parts (see above) evaluates
to true
. The second value is returned if the condition part evaluates to false
.
In the example above, if case.equals("uppercase")
evaluates to true
then
the ternary operator expression as a whole returns the String value JOHN
.
If case.equals("uppercase")
evaluates to false
then the ternary operator expression as
a whole returns the String value john
. That means, that the String variable name
will end up having the value JOHN
or john
depending on whether the expression case.equals("uppercase")
evaluates to true
or false
.
The values returned can be the result of any Java expression that returns a value that can be assigned to the variable at the beginning of the statement. Because the Java variable at the beginning of the ternary operator example at the top of this article is of type String, then the values returned by the values part must be of type String.
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