Dynamic vs static

Question

Can someone help me to understand better when we use a dynamic class or a static class in Java?

Answer 1

class SomeClass {
private int a;

static int pow2(int n) {
return n*n;
}
void seta(int a) {
this.a = a;
}
}

if a method use variable that has different values in each instantiation of this class, the method can't be static. ( here seta() )

A static method can be used eg to create a new object.
Integer oi = Integer.valueOf(100)

Answer 2

I found this on the internet

https://stackoverflow.com/questions/19519787/when-do-we-use-static-and-dynamic-class-loading