Libraries import in Java 20

To import a library in Java, you use the import keyword followed by the name of the library. Here's an example for importing the java.util library:

import java.util.*;

This imports all the classes in the java.util library, allowing you to use them in your code without having to fully qualify them.

You can also import individual classes from a library, like this:

import java.util.ArrayList;
import java.util.LinkedList;

This imports only the ArrayList and LinkedList classes from the java.util library.

Here's an example code block that demonstrates importing the java.util library and using the ArrayList class:

import java.util.*;
public class Example {

    public static void main(String[] args) {

        ArrayList names = new ArrayList();

        names.add("Alice");

        names.add("Bob");

        names.add("Charlie");

        System.out.println(names);

    }

}

In this example, we first import the java.util library using the wildcard (*) syntax. Then, we create an ArrayList object and add three names to it. Finally, we print out the contents of the ArrayList using the System.out.println() method.