To run jBudget you will need Java Runtime Environment installed on your computer.
Download it from the following sites:
If you are using Windows or Linux/Solaris, use Sun Microsystem's site .
If you are a Mac user, try this page .

To run jBudget in Windows just click on the jar file that you have downloaded. In Linux/Unix type java -jar jBudget.vx.x.x.jar in a terminal window.