Once you start exploring the city, you’ll find a coffee shop named Triple J’s Java Joint. You could buy 3 different kinds of Javas through the Vending Depot in that shop for different prices. I also found 2 Java’s that constantly spawned in the same spot day after day so you could save money. One of them is located in Toe’s Room. Once you have unlocked using the Keycode Hacker you will find one in the pantry next the fridge. Their is also one located behind the apartment building that you live in. It’s sitting on a patio with Happy Humble Bar Xl as well if you’re trying to get some progress towards that achievement as well.