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teena grover
problem scrolling jtable
1 Answer(s)      3 years and 8 months ago
Posted in : Swing AWT


hi, i've to query the table thousand of times...m table display is not getting stable/proper,especially after getting the empty table...

for removing the table i'm doing this::

numrows = tableModel.getRowCount();
if(numrows>0)
{

for(int i = numrows - 1;i>=0; i--) { tableModel.removeRow(i); }

pane.remove(table); panel.remove(pane);

for getting the table:: String[] head={"VISITOR NO","VISITOR NAME","VISIT TO PERSON","PURPOSE","IN TIME","DATE"}; colname=new Vector(Arrays.asList(head)); tableModel =new DefaultTableModel(rowdata, colname){public boolean isCellEditable(int row, int column) { return false;}}; table = new JTable(tableModel); table.setPreferredScrollableViewportSize(new Dimension(500, 70)); table.setFillsViewportHeight(true);

              settabWidth(table, head.length);
    table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
     header = table.getTableHeader();

     pane = new JScrollPane(table);
            pane.setAutoscrolls(true);
            pane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED);
            pane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
            pane.getVerticalScrollBar().setUnitIncrement(10);
            pane.setSize(600,300);
            pane.setVisible(true);

MAIN PROBLEM HERE'S M TABLE IS NOT PROPERLY SETTING IN SCROLLPANE...REPLY SOON


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April 1, 2011 at 1:32 PM


change the size of pane so that both the bars will get visible.

import java.sql.*;
import java.util.*;
import javax.swing.*; 

class JTableExample extends JFrame { 
    private static int offset = 50; 

    public JTableExample(int horizPolicy, int vertPolicy, String title) { 
    final Vector columnNames = new Vector();
    final Vector data = new Vector();
    JPanel panel=new JPanel();
    try{
    Class.forName("com.mysql.jdbc.Driver");
    Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/test", "root", "root");
    Statement st = con.createStatement();
    ResultSet rs= st.executeQuery("Select * from employee");
    ResultSetMetaData md = rs.getMetaData();
    int columns = md.getColumnCount();
    for (int i = 1; i <= columns; i++){
    columnNames.addElement(md.getColumnName(i));
    }
    while(rs.next()){
    Vector row = new Vector(columns);
    for (int i = 1; i <= columns; i++){
    row.addElement(rs.getObject(i));
    }
    data.addElement(row);
    }
   }
catch(Exception e){}
JTable table = new JTable(data, columnNames);

        setTitle(title); 
        offset += 50; 
        setLocation(offset,offset); 
        setSize(300,150); 
        table.setAutoResizeMode(JTable.AUTO_RESIZE_OFF); 
        JScrollPane scroll = new JScrollPane(table); 
        scroll.setHorizontalScrollBarPolicy(horizPolicy); 
        scroll.setVerticalScrollBarPolicy(vertPolicy); 
        getContentPane().add(scroll); 
    } 
    public static void main(String[] args) { 
     JTableExample f=new JTableExample(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED,JScrollPane. 
VERTICAL_SCROLLBAR_AS_NEEDED,"HORIZONTAL_SCROLLBAR_AS_NEEDED");
     f.setVisible(true);

    } 
}


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