Java’s main function Java’s main function. Java’s main method is composed of six terms — three reserved words, the main method name, a reference type and a variable name: public – Java’s main function ...

public static int parseInt(String s) throws NumberFormatException { … } Instance method of a particular object instance. Sometimes we need a way to refer to a method of an existing object instance.

So a more concise lambda expression that implements this Java Function interface would look like this: Function<Integer, String> conciseLambda = (Integer x)-> { return Integer.toString(x*x); }; System ...