Hi, i am new to the list and new to netbeans. Right now i am making a gui to handle the status of a scale, but i am having some issues.

First of all, the jFrame doesnt let me set the minimum or maximum size through the propierties, so i wrote this code right in the constructor
public void ScaleViewer ( ) {
            this.setSize(260,300);
...

but even so, when i test the form, it starts at minimum size (0,0) and have to resize it manually.

The second issue is that the program has to be able to put up several ScaleViewer forms at the same time. How should i handle this issue?. Any tips and help would be appreciated

Greetings, noobprogrammer Conan