For example, suppose package physics contains a Math class that’s identical to java.lang‘s Math class in that it implements the same PI constant and trigonometric methods.

java.lang: A collection of language-related classes, such as Object and String, organized in the java package’s lang subpackage; java.lang.ref: A collection of reference-related language classes ...

The Scanner class is found in the java.util package, not java.lang. Since the Scanner class is found outside of java.lang, you must either directly reference the java.util package every time you use ...

How to use Java’s Function interface. For this Java Function interface example, we will provide a single method named “apply” that takes an Integer as an argument, squares it and returns the result as ...

Java Code examples As with most programming languages, you should begin with Hello World, and that is exactly what we’re going to do right now. The following code example is how to get it done: ...