java - How can I access a control that's in a grid pane? -

i have defined grid pane in java fxml file follows:

<gridpane fx:id="grid" gridlinesvisible="true" prefheight="256" prefwidth="256">    ...    <children>     <label maxheight="1.8" maxwidth="1.8" />     <label maxheight="1.8" maxwidth="1.8" gridpane.columnindex="1" />     <label maxheight="1.8" maxwidth="1.8" gridpane.columnindex="2" />     <label maxheight="1.8" maxwidth="1.8" gridpane.rowindex="1" />     <label maxheight="1.8" maxwidth="1.8" gridpane.columnindex="1" gridpane.rowindex="1" />     <label maxheight="1.8" maxwidth="1.8" gridpane.columnindex="2" gridpane.rowindex="1" />     <label maxheight="1.8" maxwidth="1.8" gridpane.rowindex="2" />     <label maxheight="1.8" maxwidth="1.8" gridpane.columnindex="1" gridpane.rowindex="2" />     <label maxheight="1.8" maxwidth="1.8" gridpane.columnindex="2" gridpane.rowindex="2" />   </children>    ...  </gridpane> 

the grid 3 x 3 , has label in each of cells. possible loop through grid , change text each label shown in pseudo code below:

for (cell : grid) {   cell.label.settext("x"); } 

can be

for ( node node : gridpane.getchildren() ) {     (( label ) node).settext( "x" ); } 

assuming gridpane.setgridlinesvisible( false );

however when gridpane.setgridlinesvisible( true ), additional gridlines (type of group) added gridpane's children list. in case may check class types:

for ( node node : gridpane.getchildren() ) {     if(node instanceof label)         (( label ) node).settext( "x" ); } 

note gridlinesvisible property debugging purposes only. there other options style gridpane.