自适应调整表格列宽，自适应表格列宽,自适应调整表格列宽自适应

自适应调整表格列宽，自适应表格列宽,自适应调整表格列宽自适应

自适应调整表格列宽

自适应调整表格列宽

    public class ColumnResizer {        public static void adjustColumnPreferredWidths(JTable table) {            // strategy - get max width for cells in column and            // make that the preferred width            TableColumnModel columnModel = table.getColumnModel();            for (int col=0; col<table.getColumnCount(); col++) {        int maxwidth = 0;                    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);         } // for row        //TableColumn column = columnModel.getColumn (col);         //column.setPreferredWidth (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);            } // for col         }    }

测试调整表格列宽的程序

    public class TestColumnResizer {        final static Object[][] TABLE_DATA = {             {new Integer(1), "ONJava", "http://www.onjava.com/"},             {new Integer(2), "Joshy's Site", "http://www.joshy.org/"},             {new Integer(3), "Anime Weekend Atlanta", "http://www.awa-con.com/"},             {new Integer(4), "QTJ book",        "http://www.oreilly.com/catalog/quicktimejvaadn/"}        };        final static String[] COLUMN_NAMES = {            "Count", "Name", "URL"        };        public static void main (String[] args) {            // 142 mac l&f has a header bug - force metal for today            try {        UIManager.setLookAndFeel (                              UIManager.getCrossPlatformLookAndFeelClassName());                    } catch (Exception e) { e.printStackTrace();}            DefaultTableModel mod =        new DefaultTableModel (TABLE_DATA, COLUMN_NAMES);            JTable table = new JTable (mod);            JScrollPane pane =        new JScrollPane (table,                  ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS,                  ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);            JFrame frame = new JFrame ("JTable Column Widths");            frame.getContentPane().add (pane);            frame.pack();            frame.setVisible (true);            try {        Thread.sleep (5000);            } catch (Exception e) { e.printStackTrace(); }            // now get smart about col widths            final JTable fTable = table;            SwingUtilities.invokeLater(new Runnable() {            public void run() {                 ColumnResizer.adjustColumnPreferredWidths (fTable);                                    fTable.revalidate();            }         });             }         }    }