Java: create a table that a cell can contains multilines.

By default, the container in a JTable cell for a string is a JTextField object that only show all the content in one line. Sometimes, we need to present multi-lines in one cell, so we have to overwrite the cell handle object. Here is a sample for it.

The sequence is that overwrite the abstractTableModel, then overwrite the DefaultTableCellRender.

private DefaultTableModel getLogModel(){

if(logTblModel == null){

logTblModel = new DefaultTableModel() {

public boolean isCellEditable(int row, int colum) {

return false;

}

};

for(TITLE t : TITLE.values()){

logTblModel.addColumn(t.getName());

}

}
return logTblModel;

}


private JTable getTblLogRec() {

if (tblLogRec == null) {

tblLogRec = new JTable(getLogModel());
tblLogRec.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
tblLogRec.getColumn(TITLE.TIME.getName()).setPreferredWidth(100);
tblLogRec.getColumn(TITLE.LEVEL.getName()).setPreferredWidth(50);
tblLogRec.getColumn(TITLE.MESSAGE.getName()).setPreferredWidth(375);
tblLogRec.getColumnModel().getColumn(TITLE.MESSAGE.ordinal()).setCellRenderer(new DefaultTableCellRenderer() {

private JTextPane _sumaryTxtPane;
public Component getTableCellRendererComponent(

JTable table, Object value, boolean isSelected,
boolean hasFocus, int row, int column) {

getSumaryTxtPane().setText((String) value);
TableColumnModel columnModel = table
.getColumnModel();
getSumaryTxtPane().setSize(
columnModel.getColumn(column).getWidth(),
100000);
int heightWanted = (int) getSumaryTxtPane()
.getPreferredSize().getHeight();
if (heightWanted != table.getRowHeight(row)) {

table.setRowHeight(row, heightWanted);

}
if(isSelected){

getSumaryTxtPane().setBackground(getTblLogRec().getSelectionBackground());

}else{

getSumaryTxtPane().setBackground(getTblLogRec().getBackground());

}
return getSumaryTxtPane();

}

private JTextPane getSumaryTxtPane() {

if (null == _sumaryTxtPane) {

_sumaryTxtPane = new JTextPane();

}
return _sumaryTxtPane;

}

});

}
return tblLogRec;

}

}