Java 11 and 12 – New Features

Issues with resolving overloaded methods – passing lambdas 

Let's cover the existing issues with resolving overloaded methods when lambdas are passed as method parameters. Let's define two interfaces, Swimmer and Diver, as follows:

interface Swimmer {    boolean test(String lap);}interface Diver {    String dive(int height);}

In the following code, the overloaded evaluate method accepts the interfaces Swimmer and Diver as method parameters:

class SwimmingMeet {    static void evaluate(Swimmer swimmer) {   // code compiles                                                             System.out.println("evaluate swimmer");    }    static void evaluate(Diver diver) {      // code compiles                                                                 System.out.println("evaluate diver");    }}

Let's call the overloaded evaluate() method in the following code:

class FunctionalDisambiguation ...