Foo2

This is an example of a java-class. There are two constructors. And -> to call the method x, you can't make it with an nstance-variable because x is static. static means it is only one-time in the whole program. For example, in a game the variable level is only one-time, it is static. so to call the static method x, you must bring a Foo2-Object, then the program knows which i-variable is meant