Old Object Take Variable From New

I have a problem with my code. When, on strausParser class, i create the new object Beam i give him an array of Node object called "nodiestremi".

The problem is that when a Beam is created, the Beam created before take the Node of new Beam. Why it appends?

public class Main { 
public static void main(String[] args) throws NumberFormatException, IOException{
SetFile.setupWindows();
Structure structure = new Structure();
}
public class SetFile {
}

I get an output like this:

Import node complete
0 0 0 1
0 1 1 2
0 1 1 0
0 2 2 4
Import beam complete

and not like this:

Import node complete
0 0 0 1
0 0 1 2
0 0 1 0
0 0 2 4
Import beam complete