The Java three-object operator is very simple but not commonly used, so I always forget to write an example for ease of viewing.

Understanding and simple application of the Three-object operator in Java. Glossary
Three-object Operator:
<Expression 1>? <Expression 2>: <expression 3> ;"? "Operator meaning: evaluate the value of expression 1 first. If it is true, execute expression 2 and return the result of expression 2. If the value of expression 1 is false, execute expression 3, returns the result of expression 3.

Example:
JavaCode

1. IntA =2;
2. IntB = (a =2?2:5);

Int A = 2; int B = (a = 2? 2: 5 );

Output B;
The result is that B is 2.