Java ignited a revolution when Sun transitioned it to the Web in 1994, and although Java has been reasonably successful on the client (the user's machine), Java on the server became very popular. When a Java program is launched from a Web page, the program is called a Java applet..
It means that the breed has been over-breed. The female is breed over and over, too often and without proper testing. I have heard of lots of Cocker Spaniels with genetic eye problems from over/improper breeding. Overbred is when a dog has litters back to back, usually every 6 months.
For many people, that's the biggest advantage of purebred dogs. Purebred dogs have some temperament/behavior traits that are predictable. SOME aspects of temperament and behavior are also carried on genes. If you want an energetic dog, you can choose a breed who typically inherits genes for high energy.