Java JTable Column Size Calculate autoSizeCols(JTable table)

Description

auto Size Cols

License

Apache License

Declaration

public static void autoSizeCols(JTable table) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.awt.Component;
import javax.swing.JTable;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;
import javax.swing.table.TableColumnModel;

public class Main {
    public static void autoSizeCols(JTable table) {
        if (table == null || table.getColumnCount() == 0) {
            return;
        }//w  ww  .  ja  v  a  2  s .  c om

        // strategy - get max width for cells in column and
        // make that the preferred width
        TableColumnModel columnModel = table.getColumnModel();

        // For each col
        for (int col = 0; col < table.getColumnCount(); col++) {
            int maxwidth = 0;

            // For each row
            for (int row = 0; row < table.getRowCount(); row++) {
                TableCellRenderer rend = table.getCellRenderer(row, col);
                Object value = table.getValueAt(row, col);
                Component comp = rend.getTableCellRendererComponent(table, value, false, false, row, col);
                maxwidth = Math.max(comp.getPreferredSize().width, maxwidth);
            }

            TableColumn column = columnModel.getColumn(col);
            TableCellRenderer headerRenderer = column.getHeaderRenderer();
            if (headerRenderer == null) {
                headerRenderer = table.getTableHeader().getDefaultRenderer();
            }
            Object headerValue = column.getHeaderValue();
            Component headerComp = headerRenderer.getTableCellRendererComponent(table, headerValue, false, false, 0,
                    col);
            maxwidth = Math.max(maxwidth, headerComp.getPreferredSize().width);

            column.setPreferredWidth(maxwidth);
        }
    }
}

Related

1. adjustColumnSizes(JTable table, int column, int margin)
2. autoSizeTableColumns(JTable table)
3. calcColumnWidth(JTable table, int col)
4. calcColumnWidths(final JTable table)
5. calcColumnWidths(final JTable table)