How do I auto-expand a JTree when setting a new TreeModel?

Question

I have a custom JTree and a custom JModel; I would for the JTree to \"auto-expand\" when I give it a new model. At the moment, it simply collapse a

Answer 1

public void expandTree(){
    int row = 1;
    while (row++ < tree.getRowCount()){
        tree.expandRow(row);
    }

public void collapseTree(){
    int row = tree.getRowCount() - 1;
    while (row-- > 0){
        tree.collapseRow(row);
    }
}