Java (known as Java the Caveman in a full name) is a character, a worker at Torrington Academy, a paranormal investigator for The Center, Martin's best friend, an aide-de-camp to Diana and Martin and the deuteragonist from the animated series, Martin Mystery. He is voiced by Dale Wilson.
Java, the 200,000-year-old caveman, is friends with both Martin and Diana. He works at Torrington as a cook and a janitor. However, Java assists Martin and Diana in their investigations, serving as the team's tracker. His brute strength proves useful when battling monstrous foes or breaking through barriers.
Even though he is a lover of lizards and spiders, Java fears cats, heights, and technology (his fear of technology being a running gag in the show). As the member in the trio who speaks the least, his English is on a fairly simplistic level (e.g. "What that?", "Diana bald", and "Java no like this place"). Besides that, Java has a knack for thinking "outside the box", which greatly helps in the team's investigations.
Java is a significant source of comedy in the show due to his reactions to various scenarios and his poor hygiene as a caveman (e.g. his offensive foot odor, stinky armpits, and filthy breath). Java is sometimes the victim of the paranormal, including being transformed into a monster, such as when he inhales the Chaos Beast in its gas form, or brainwashed by a pirate-controlled Martin. Also, Diana once had to give Java a foot massage after losing a bet to Martin.
Java's appearance was tall and muscular with black hair, tan-brown skin, dark-brown eyes and hairy arms. His main outfit (in most episodes) which he wears is an orange collared shirt and dark navy blue pants with black shoes. Also, he wears a necklace with a silver-shark tooth.