Java 11 and 12 – New Features

Explicit casting with inferred variables

Imagine that a co-programmer assigned 29 to an inferred local variable (let's say age), assuming that the compiler would infer the type of the variable age as byte:

var age = 29;           // inferred type of age is int 

However, the compiler would infer the type of the variable age as int, since the default type of an integer literal value is int. To fix the preceding assumption, you can either use the explicit data type or override the compiler's default inference mechanism by using explicit casting, as follows:

byte age = 29;                // Option 1 - no type inference var age = (byte)29;           // Option 2 - explicit casting 

By using explicit casting type inference, you can override the compiler's default type inference mechanism. ...