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import java.util.LinkedList;
import java.util.List;
import javax.swing.SwingUtilities;
import javax.swing.table.AbstractTableModel;
/**
*
* @date 17/10/2012
*/
public class SizeFixedStackTableModel<R> extends AbstractTableModel {
public static interface RecordRenderer<R> {
int getColumnCount();
/**
*
* @param record
* @param column
* @return
* @throws IndexOutOfBoundsException when column is not valid
* {@code ( column < 0 || column >= getColumnCount() )}
*/
Object getValueAt(R record, int column);
}
private final RecordRenderer<? super R> recordRenderer;
private volatile int size;
private List<R> records;
public SizeFixedStackTableModel(RecordRenderer<? super R> recordRenderer,
int size) {
if( recordRenderer == null )
throw new NullPointerException();
if( size < 0 )
throw new IllegalArgumentException();
this.recordRenderer = recordRenderer;
this.size = size;
this.records = new LinkedList<R>();
}
@Override
public int getRowCount() {
assert SwingUtilities.isEventDispatchThread();
return Math.min(size, records.size());
}
@Override
public int getColumnCount() {
assert SwingUtilities.isEventDispatchThread();
return recordRenderer.getColumnCount();
}
@Override
public Object getValueAt(int rowIndex, int columnIndex) {
assert SwingUtilities.isEventDispatchThread();
// potentially throws IndexOutOfBoundsException
R record = records.get(rowIndex);
return recordRenderer.getValueAt(record, columnIndex);
}
public void setSize(int size) {
if( size < 0 )
throw new IllegalArgumentException("Invalid table model size: " + size);
if( this.size == size )
return;
this.size = size;
fireTableDataChanged();
}
public void insert(final R record) {
if( SwingUtilities.isEventDispatchThread() ) {
records.add(0, record);
fireTableDataChanged();
}
else {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
insert(record);
}
});
}
}
}
import java.awt.BorderLayout; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.Date; import java.util.concurrent.CountDownLatch; import javax.swing.JFrame; import javax.swing.JTable; import javax.swing.SwingUtilities; /** * * @date 17/10/2012 */ public class TestTable { public static void main(String[] args) throws Exception { final int rows = 30 ; final SizeFixedStackTableModel<Date> model = new SizeFixedStackTableModel<Date>( new SizeFixedStackTableModel.RecordRenderer<Date>() { private final DateFormat format = new SimpleDateFormat( "yyyy-MM-dd hh:mm:ss:SSS" ); @Override public int getColumnCount() { return 2 ; } @Override public Object getValueAt(Date record, int column) { if ( column == 0 ) return format.format(record); else if ( column == 1 ) return record.getTime(); else throw new IndexOutOfBoundsException( "Invalid column : " + column); } }, rows); final CountDownLatch cd = new CountDownLatch( 1 ); SwingUtilities.invokeLater( new Runnable() { @Override public void run() { JFrame f = new JFrame( "Test Table Model" ); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JTable table = new JTable(model); f.getContentPane().add(table, BorderLayout.CENTER); f.setSize( 800 , table.getRowHeight() * rows + 50 ); f.setLocationRelativeTo( null ); f.setVisible( true ); cd.countDown(); } }); cd.await(); while ( true ) { Thread.sleep( 500 ); model.insert( new Date()); } } } 转载地址：http://ymswn.baihongyu.com/