When to use interfaces in Java. Interfaces are very useful for decoupling code and implementing polymorphism.We can see an example in the JDK, with the List interface: ...

Java 8 also lets you define static methods in interfaces. An example from Java’s standard class library is java.lang.invoke.MethodHandleInfo‘s static String referenceKindToString(int ...

Java Supplier interface tutorial. As you can see, the code for the class that implements Java’s Supplier interface is fairly simple. The only requirements are the class declaration and the ...

Sample Consumer interface use cases. The functional Consumer interface is used extensively across the Java API, with a number of classes in the java.util.function package, such as ObjIntConsumer, ...