Ich muss das horizontale Scrollen von Tabellen synchronisieren. Die Spalten sind identisch. Die einzige Eigenschaft, die für die Spalten geändert werden kann, ist ihre Größe. Der folgende Code zeigt nun 3 Tabellen mit synchronisiertem Bildlauf. Aber wenn ich die Größe einer Spalte in einer der Tabellen ändere und dann versuche zu scrollen, erhalte ich einen Stapelüberlauffehler und die GUI ist verzerrt.

Ich versuche es zu erreichen, indem ich die Viewport-Position der restlichen Tabellen auf die Spalte setze, die links an erster Stelle steht. Wenn die Größe der Spalten unterschiedlich ist, dann rekonstruiere ich die Position der anderen Tabelle von dem für diese Spalte gescrollten Prozentsatz.

import java.awt.Color;
import java.awt.Point;
import java.awt.event.AdjustmentEvent;
import java.awt.event.AdjustmentListener;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.JTableHeader;
import javax.swing.table.TableColumnModel;

public class ScrollableJTable implements AdjustmentListener{ 
  JFrame frame = null;
  JPanel panel =  null;
  JTable table = null;
  JTableHeader header = null;
  JScrollPane pane = null;
  JTable table1 = null;
  JTableHeader header1 = null;
  JScrollPane pane1 = null;  
  JTable table2 = null;
  JTableHeader header2 = null;
  JScrollPane pane2 = null;  

    public static void main(String[] args) { 
        new ScrollableJTable(); 
    } 

    public ScrollableJTable() { 
        frame = new JFrame("Creating a Scrollable JTable!"); 
        panel = new JPanel(); 
        String data[][] = { 
            {"001", "vinod", "Bihar", "India", "Biology", "65", "First","001", "vinod", "Bihar", "India", "Biology", "65", "First"}, 
            {"002", "Raju", "ABC", "Kanada", "Geography", "58", "second","001", "vinod", "Bihar", "India", "Biology", "65", "First"}, 
            {"003", "Aman", "Delhi", "India", "computer", "98", "Dictontion","001", "vinod", "Bihar", "India", "Biology", "65", "First"}, 
            {"004", "Ranjan", "Bangloor", "India", "chemestry", "90", "Dictontion","001", "vinod", "Bihar", "India", "Biology", "65", "First"}           
        }; 
        String col[] = {"Roll", "Name", "State", "country", "Math", "Marks", "Grade","Roll", "Name", "State", "country", "Math", "Marks", "Grade"}; 
        table = new JTable(data, col); 
        table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); 
        header = table.getTableHeader(); 
        header.setBackground(Color.yellow); 
        pane = new JScrollPane(table);
        pane.getHorizontalScrollBar().addAdjustmentListener(this);
        pane.setSize(100, 100);

        table1 = new JTable(data, col); 
        table1.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); 
        header1 = table1.getTableHeader(); 
        header1.setBackground(Color.yellow); 
        pane1 = new JScrollPane(table1);   
        pane1.getHorizontalScrollBar().addAdjustmentListener(this);
        pane1.setSize(100, 100);

        table2 = new JTable(data, col); 
        table2.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); 
        header2 = table2.getTableHeader(); 
        header2.setBackground(Color.yellow); 
        pane2 = new JScrollPane(table2);   
        pane2.getHorizontalScrollBar().addAdjustmentListener(this);
        pane2.setSize(100, 100);

        panel.setSize(500, 500);
        panel.add(pane);         
        panel.add(pane1);
        panel.add(pane2);
        frame.add(panel);
        frame.pack(); 
        frame.setSize(1000, 1000); 
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 
        frame.setVisible(true); 
    }

    public void adjustmentValueChanged(AdjustmentEvent e) {

      JScrollPane scrollPane = null, scroll = null;
      JScrollBar bar = null;
      int position[] = null;


      bar = (JScrollBar) e.getAdjustable();
      scroll = (JScrollPane) bar.getParent();
      position = this.getFirstVisibleColumnIndex(scroll);
      for (int j = 0; j < panel.getComponentCount(); j++) {
        scrollPane = (panel.getComponent(j) instanceof JScrollPane) ? (JScrollPane) panel.getComponent(j) : null;
        if (scrollPane != null && scrollPane != scroll) this.setFirstColumnVisiblePosition(position, scrollPane);
      }

    } 

    private int[] getFirstVisibleColumnIndex(JScrollPane scroll) {
      JTable table = null;
      TableColumnModel model = null;
      Object obj = null;
      int retval[] = null, index = -1, position = -1, relpos = -1;

      if (scroll == null) return null;
      obj = scroll.getViewport().getView();
      table = (obj instanceof JTable ? (JTable)obj : null);
      if (table == null) return null;
      model = table.getColumnModel();
      if (model == null) return null;

      position = scroll.getViewport().getViewPosition().x;
      for (int column = 0; index == -1 && column < model.getColumnCount(); column++) {
        position = position - model.getColumn(column).getWidth();
        if (position < 0) {
          index  = column;
          relpos = ((position + model.getColumn(column).getWidth()) * 100) / model.getColumn(column).getWidth();
        }
      }

      retval = new int[2];
      retval[0] = index;   
      retval[1] = relpos;  
      return retval;
    }


    private boolean setFirstColumnVisiblePosition(int position[], JScrollPane scroll) {
      JTable table = null;
      TableColumnModel model = null;
      Object obj = null;
      int pos = 0, width = 0;

      if (scroll == null || position == null) return false;
      obj = scroll.getViewport().getView();
      table = (obj instanceof JTable ? (JTable)obj : null);
      if (table == null) return false;
      model = table.getColumnModel();
      if (model == null) return false;
      if (position[0] == -1 || position [1] == -1) return false;

      for (int column = 0; column < position[0]; column++) {
        pos = pos + model.getColumn(column).getWidth();
      }
      width = model.getColumn(position[0]).getWidth(); 

      pos   = pos + ((position[1] * width) / 100);

      scroll.getViewport().setViewPosition(new Point(pos, scroll.getViewport().getViewPosition().y));
      return true;
    }
}