自适应调整表格列宽代码,Java代码库,德仔网

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【Java】自适应调整表格列宽
作者:jxqlovejava / 发布于2012/6/12/ 554
<div>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++) {</div>
<div>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)</div>
<div>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 
}
}
</div>
<div>测试调整表格列宽的程序</div>
<div></div>
<div>public class TestColumnResizer {
final static Object[][] TABLE_DATA = { 
{new Integer(1), "ONJava", "<a href="http://www.onjava.com/">http://www.onjava.com/</a>"}, 
{new Integer(2), "Joshy's Site", "<a href="http://www.joshy.org/">http://www.joshy.org/</a>"}, 
{new Integer(3), "Anime Weekend Atlanta", "<a href="http://www.awa-con.com/">http://www.awa-con.com/</a>"}, 
{new Integer(4), "QTJ book",
"<a href="http://www.oreilly.com/catalog/quicktimejvaadn/">http://www.oreilly.com/catalog/quicktimejvaadn/</a>"}
};

final static String[] COLUMN_NAMES = {
"Count", "Name", "URL"
};</div>
<div>public static void main (String[] args) {
// 142 mac l&f has a header bug - force metal for today
try {</div>
<div>UIManager.setLookAndFeel ( 
UIManager.getCrossPlatformLookAndFeelClassName()); 
} catch (Exception e) { e.printStackTrace();}
DefaultTableModel mod =
new DefaultTableModel (TABLE_DATA, COLUMN_NAMES);
JTable table = new JTable (mod);
JScrollPane pane =</div>
<div>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);</div>
<div>try {
Thread.sleep (5000);
} catch (Exception e) { e.printStackTrace(); }
<div>// now get smart about col widths
final JTable fTable = table;
SwingUtilities.invokeLater(new Runnable() {</div>
<div>public void run() { 
ColumnResizer.adjustColumnPreferredWidths (fTable); 
fTable.revalidate();
} 
}); 
} 
}
}
试试其它关键字
　调整表格列宽　
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