An example of operations on jtable rows and columns

/**
Example of jtable row and column operations
Add rows and columns in the jtable, delete rows and columns, and select rows and columns...
*/
Package test;
Import java. util. arraylist;
Import java. AWT. event. actionlistener;
Import java. AWT. event. actionevent;
Import java. AWT. eventqueue;
Import javax. Swing. jtable;
Import javax. Swing. Table. defaulttablemodel;
Import javax. Swing. Table. tablecolumnmodel;
Import javax. Swing. Table. tablecolumn;
Import javax. Swing. jframe;
Import javax. Swing. jscrollpane;
Import javax. Swing. jmenu;
Import javax. Swing. jmenubar;
Import javax. Swing. jcheckboxmenuitem;
Import javax. Swing. jmenuitem;
Public class tableselectiontest {
Public static void main (string [] ARGs ){
Eventqueue. invokelater (New runnable (){
Public void run (){
Jframe frame = new tableselectionframe ();
Frame. setdefaclocloseoperation (jframe. exit_on_close );
Frame. setvisible (true );
}
});
}
}
Class tableselectionframe extends jframe {
Public tableselectionframe (){
Settitle ("tableselectiontest ");
Setsize (default_width, default_height );

// Set up multiplication table
Model = new defaulttablemodel (10, 10 );
For (INT I = 0; I <model. getrowcount (); I ++ ){
For (Int J = 0; j <model. getcolumncount (); j ++ ){
Model. setvalueat (I + 1) * (J + 1), I, j );
}
}
Table = new jtable (model );
Add (New jscrollpane (table), "center ");
Removedcolumns = new arraylist <tablecolumn> ();

Jmenubar menubar = new jmenubar ();
Setjmenubar (menubar );

Jmenu selectionmenu = new jmenu ("selection ");
Menubar. Add (selectionmenu );

Final jcheckboxmenuitem rowsitem = new jcheckboxmenuitem ("rows ");
Final jcheckboxmenuitem columnsitem = new jcheckboxmenuitem ("columns ");
Final jcheckboxmenuitem cellsitem = new jcheckboxmenuitem ("cells ");

Rowsitem. setselected (table. getrowselectionallowed ());
Columnsitem. setselected (table. getcolumnselectionallowed ());
Cellsitem. setselected (table. getcellselectionenabled ());

Rowsitem. addactionlistener (New actionlistener (){
Public void actionreceivmed (actionevent event ){
Table. clearselection ();
Table. setrowselectionallowed (rowsitem. isselected ());
Cellsitem. setselected (table. getcellselectionenabled ());
}
});
Selectionmenu. Add (rowsitem );

Columnsitem. addactionlistener (New actionlistener (){
Public void actionreceivmed (actionevent event ){
Table. clearselection ();
Table. setcolumnselectionallowed (columnsitem. isselected ());
Cellsitem. setselected (table. getcellselectionenabled ());
}
});
Selectionmenu. Add (columnsitem );

Cellsitem. addactionlistener (New actionlistener (){
Public void actionreceivmed (actionevent event ){
Table. clearselection ();
Table. setcellselectionenabled (cellsitem. isselected ());
Rowsitem. setselected (table. getrowselectionallowed ());
Columnsitem. setselected (table. getcolumnselectionallowed ());
}
});
Selectionmenu. Add (cellsitem );

Jmenu tablemenu = new jmenu ("edit ");
Menubar. Add (tablemenu );

Jmenuitem hidecolumnsitem = new jmenuitem ("Hide columns ");
Hidecolumnsitem. addactionlistener (New actionlistener (){
Public void actionreceivmed (actionevent event ){
Int [] selected = table. getselectedcolumns ();
Tablecolumnmodel columnmodel = table. getcolumnmodel ();
For (INT I = selected. length; I> = 0; I --){
Tablecolumn column = columnmodel. getcolumn (selected [I]);
Table. removecolumn (column );
Removedcolumns. Add (column );
}
}
});
Tablemenu. Add (hidecolumnsitem );

Jmenuitem showcolumnsitem = new jmenuitem ("show columns ");
Showcolumnsitem. addactionlistener (New actionlistener (){
Public void actionreceivmed (actionevent event ){
For (tablecolumn TC: removedcolumns ){
Table. AddColumn (TC );
}
Removedcolumns. Clear ();
}
});
Tablemenu. Add (showcolumnsitem );

Jmenuitem addrowitem = new jmenuitem ("add row ");
Addrowitem. addactionlistener (New actionlistener (){
Public void actionreceivmed (actionevent e ){
Integer [] newcells = new integer [model. getcolumncount ()];
For (INT I = 0; I <newcells. length; I ++ ){
Newcells [I] = (I + 1) * (model. getrowcount () + 1 );
}
Model. addrow (newcells );
}
});
Tablemenu. Add (addrowitem );

Jmenuitem removerowsitem = new jmenuitem ("Remove rows ");
Removerowsitem. addactionlistener (New actionlistener (){
Public void actionreceivmed (actionevent event ){
Int [] selected = table. getselectedrows ();
For (INT I = selected. Length-1; I> = 0; I --){
Model. removerow (selected [I]);
}
}
});
Tablemenu. Add (removerowsitem );

Jmenuitem maid = new jmenuitem ("clear cells ");
Clearcellsitem. addactionlistener (New actionlistener (){
Public void actionreceivmed (actionevent event ){
For (INT I = 0; I <Table. getrowcount (); I ++ ){
For (Int J = 0; j <Table. getcolumncount (); j ++ ){
If (table. iscellselected (I, j )){
Table. setvalueat (0, I, j );
}
}
}
}
});
Tablemenu. Add (clearcellsitem );

}

Private defaulttablemodel model;
Private jtable table;
Private arraylist <tablecolumn> removedcolumns;

Private Static final int default_width = 400;
Private Static finals int default_height = 300;
}