What are some examples of type inference in Java?

What are some examples of type inference in Java?

Type inference in Java allows the compiler to determine the type of a variable automatically. For example, using the 'var' keyword in Java 10 and later, you can write:

var list = new ArrayList<String>();

Here, the type of 'list' is inferred to be 'ArrayList<String>'.

Can you give me another example?

Sure! Here's another example:

var number = 10;

In this case, the type of 'number' is inferred to be 'Integer'.

What about using type inference with lambda expressions?

Great question! When using lambda expressions, type inference helps determine the parameter types. For instance:

List<String> names = Arrays.asList("Alice", "Bob");
names.forEach(name -> System.out.println(name));

Here, the type of 'name' is inferred as 'String'.

Are there any limitations to type inference?

Yes, there are limitations. For example, type inference cannot be used in all contexts, such as method return types. You still need to specify the return type explicitly in some cases.