Module import declarations

Definition

A module import (Java 25) imports every public class that a module exports with one line, import module java.base;. It saves long lists of imports in small programs and scripts.

Example code

One import line instead of five

import module java.base;           // List, Map, Stream, LocalDate... all available

class Demo {
    public static void main(String[] args) {
        List<String> names = List.of("Asha", "Ravi");
        Map<String, Integer> lengths = new HashMap<>();
        for (String name : names) lengths.put(name, name.length());

        System.out.println(lengths);
        System.out.println(names.stream().map(String::toUpperCase).collect(Collectors.joining(", ")));
        System.out.println(LocalDate.of(2026, 1, 1).getDayOfWeek());
    }
}

// Output:
// {Asha=4, Ravi=4}
// ASHA, RAVI
// THURSDAY