The instance method reference refers to the toUpperCase() method that is called on instances of String. Next, consider the expected signature . The map() function in Java’s Stream API expects a ...

Method references: A primer. My previous Java 101 tutorial introduced lambda expressions, which are used to define anonymous methods that can then be treated as instances of a functional interface.

According to the Java Enhancement Proposal 445: …these changes allow us to write Hello, World! with no access modifiers, no static modifiers, and no String[] parameter, so the introduction of these ...

Java 8 introduced a new list() method in java.nio.file.Files. The list method returns a lazily populated Stream of entries in the directory. As such, it is more efficient for processing large folders.

To build your first Java AWS Lambda function, just create a simple class with an instance method that performs the following functions: Takes a String as an argument. Returns a String. Writes to the ...