I am trying to match the JTable column width depending on the data inside. My Code:
for(int column = 0; column < gui.testsuiteInfoTable.getColumnCount(); column ++){
int width =0;
for (int row = 0; row < gui.testsuiteInfoTable.getRowCount(); row++) {
TableCellRenderer renderer = gui.testsuiteInfoTable.getCellRenderer(row, column);
Component comp = gui.testsuiteInfoTable.prepareRenderer(renderer, row, column);
width = Math.max (comp.getPreferredSize().width, width);
System.out.println(width);
}
TableColumn col = new TableColumn();
col = gui.testsuiteInfoTable.getColumnModel().getColumn(column);
System.out.println(width);
col.setWidth(width);
gui.testsuiteInfoTable.revalidate();
}
}
The sizes are correct I guess but the table columns still all have the same width! The table is embedded in a ScrollPane in a GridBagLayout is that the problem? Thanks for any suggestions.
If you can use an extra library, try Swingx (https://java.net/projects/swingx)
There you have a JXTable, with a method "packAll()", that does exactly what you are asking for
This is all you need:
JTable table = new JTable(){
@Override
public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
Component component = super.prepareRenderer(renderer, row, column);
int rendererWidth = component.getPreferredSize().width;
TableColumn tableColumn = getColumnModel().getColumn(column);
tableColumn.setPreferredWidth(Math.max(rendererWidth + getIntercellSpacing().width, tableColumn.getPreferredWidth()));
return component;
}
};
table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
The table will adjust each column width automatically to fit the content. There's no need to control when to trigger the resizing.
col.setWidth(width);
Read the JTable API and follow the link on How to Use Tables. In that tutorial they use the setPreferredWidth(...) to suggest a width for a column.
You may also want to check out the Table Column Adjuster which does this for you. This solution can also take into account the width of the column header.
