How to get component located in a specific gridx,

问题:

I have a jpanel with gridbaglayout layout, in it i have several jtextfields, several jlabels, several jbuttons which get added dynamically. Therefore I cannot know their specific orders, hence cannot use panel.getComponent(count). I looked in the api if there is something like getGridx(int x) or getGridy(int y). Didn't find. Is there anything similar to those methods?

回答1:

The simplest solution might be to use GridBagLayout#getConstraints(Component) and simply loop through all the components until you find one that matches the required grid position...

Component match = null;
GridBagLayout layout = ...
for (Component comp : getComponents()) {
    GridBagConstraints gbc = layout.getConstraints(comp);
    if (gbc.gridx = x && gbc.gridy = y) {
        match = comp;
        break;
    }
}