Java – why are variables allowed to be declared in a for loop?

I'm a student. I'm learning java at school. I'm confused about it

That's what I mean:

for (int i = 0; i < 3; i ++) {
    int x = 5;
}

Isn't that the same thing? (this is incorrect)

int x = 5;
int x = 5;

If not, why? They all declare the same variables / twice, although I know that variables are local in the loop and cannot be used outside the loop (I don't think this is a problem) I also know that you can't declare the same variable twice, so I don't understand how the first example is legal

Thank you very much: D

This problem has been solved. Thank all those who have helped: D

Solution

for (int i = 0; i < 3; i ++) {

for (int i = 0; i < 3; i ++) {
    int x = 5;
}

In fact, it is equivalent to:

{
    int x = 5;
}
{
    int x = 5;
}
{
    int x = 5;
}

Each x variable is declared in a separate scope