Java SE (Java Platform, Standard Edition)

ok here is the problem, this code was working without probs at my friends home, but when i tried it this thing it copied data of one jtable to another but only single row means every new entry replace previous data so what you get is just the selected row data in another table whether i want the entry of each row going to other tables.

HERE is the SSCE

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;

/*
 * TableDataMover.java
 * This class can be used to move one row of data from one JTable to another JTable
 * The movement can also cek for uniqeness
 *
 * Created on May 8, 2007, 12:03 PM
 * @author Nur Agus Suryoko
 */

public class TableDataMover {
    /**
     * Using DefaultTableModel to create the model for destination JTable
     */
    private DefaultTableModel model;
    
    /**
     * Both JTable below is the origin and destination table. Data is moved from table_origin to table_destination
     */
    private JTable table_origin;
    private JTable table_destination;
    
    /**
     * This is the data that will be inserted in the table_destination
     */
    Object data_move[];
    
    /**
     * This object is needed to create the column for table_destination as the table is empty at first
     */
    Object column[];
    
    /**
     * Unusual empty row, used with column to create a tablemodel
     */
    Object empty_row[][];
    
    /** Creates a new instance of TableDataMover */
    public TableDataMover() {
    }
    
    /**
     * Creates a new instance of TableDataMover with table_origin and table_destination directly initialized
     */
    public TableDataMover(JTable table_origin, JTable table_destination) {
        this.setTable_origin(table_origin);
        this.setTable_destination(table_destination);
        
        /**
         * Creating column
         */
        column = new Object[table_origin.getColumnCount()];
        for (int i=0;i<table_origin.getColumnCount();i++) {
            column[i] = table_origin.getColumnName(i);
        }
        
        /**
         * Set the empty table_destination
         */
        model = new DefaultTableModel(empty_row,column);
        table_destination.setModel(model);
    }
    
    /**
     * Copy one row without uniqueness check
     */
    public void copy_row() {
        /**
         * Count the number of column
         */
        int column_count = getTable_origin().getColumnCount();
        
        /**
         * Initialize the row
         */
        data_move = new Object[column_count];
        
        /**
         * Copy values from table_origin to the data_move
         */
        for (int i=0;i<column_count;i++) {
            data_move[i] = getTable_origin().getValueAt(getTable_origin().getSelectedRow(),i);
        }
        
        /**
         * Add it to the DefaultTableModel
         */
        model.addRow(data_move);
        
        /**
         * Show it! and Done!
         */
        getTable_destination().setModel(model);
    }
    
    /**
     * Creates a new instance of TableDataMover with table_origin and table_destination directly initialized
     */
    public void copy_row_unique() {
        if (cek_unique()) {
            copy_row();
        }
    }
    
    public void remove_row() {
        model.removeRow(getTable_destination().getSelectedRow());
    }
    
    /**
     * This method check the uniqueness
     */
    private boolean cek_unique() {
        /**
         * Creates a new instance of TableDataMover with table_origin and table_destination directly initialized
         */
        boolean is_unique = true;
        
        int table_destination_length = model.getRowCount();
        
        /**
         * This is the string that will be checked for uniqueness
         */
        String key = getTable_origin().getValueAt(getTable_origin().getSelectedRow(),getTable_origin().getSelectedColumn()).toString();
        
        /**
         * Checking....
         */
        for (int i=0;i<table_destination_length;i++) {
            String key2 = getTable_destination().getValueAt(i,getTable_origin().getSelectedColumn()).toString();
            if (key2.equals(key)) {
                is_unique = false;
                break;
            }
        }
        return is_unique;
    }
    
    public JTable getTable_origin() {
        return table_origin;
    }
    
    public void setTable_origin(JTable table_origin) {
        this.table_origin = table_origin;
    }
    
    public JTable getTable_destination() {
        return table_destination;
    }
    
    public void setTable_destination(JTable table_destination) {
        this.table_destination = table_destination;
    }
}

and by this method i am copying the rows

    private void jTable1MouseClicked(java.awt.event.MouseEvent evt) {                                     
       TableDataMover mover = new TableDataMover(jTable1, jTable2);
        mover.copy_row(); //the selected row will be copied from jTable1 to jTable2
         // TODO add your handling code here:
    }   

please give any hints

Thanks