toolbox

toolbox is a collection of Java libraries.

Java modules

module	package
toolbox.lazy	org.spokbjorn.lazy
toolbox.tuple	org.spokbjorn.tuple

Gradle

notation	java target version	release	snapshot
org.spokbjorn:lazy	9
org.spokbjorn:tuple	17

toolbox.lazy

A lazy value supplier.

What this library provides is a way to make Supplier provide a lazy value which is cached and reused in sequenced calls.

import org.spokbjorn.lazy.Lazy;

class Example {
    public static final lazy = Lazy.of(() -> "Hello, World");
    
    public static void main(String[] main) {
        System.out.println(lazy); // out: Hello, World

        // Doesn't call the supplier again
        System.out.println(lazy); // out: Hello, World
    }
}

toolbox.tuple

A collection of tuples.

What this library tries to solve is the lack of generic data objects. There is Map.Entry<K, V> which is not the prettiest to import but other than this there is no generic data objects to use. To solve this the library contains eight generic data objects that can be mixed with different generic values.

import org.spokbjorn.tuple.Tuple;

class Example {
    public static void main(String[] args) {
        Duad<String, Boolean> duad = Tuple.of("John", true);
        System.out.printf("%s statement is %s%n", duad.first(), duad.second()); // out: John statement is true
    }
}