In this chapter, you will learn
What type inference is
What local variable type inference is
What the restricted type name var is
The rules to use var to declare local variables, indexes of for-each loop and for loop, and formal parameters for implicitly typed lambda expressions
What Is Type Inference?
Suppose you want to store a person ID, say, 10, in a variable. You would declare the variable like
int personId = 10;
To store a list of person IDs, you would declare a variable like
ArrayList<Integer> personIdList = new ArrayList<Integer>();
How about rewriting these variable declarations as follows? ...
