...
    table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
    table.getSelectionModel().addListSelectionListener(
            new ListSelectionListener() {
                public void valueChanged(ListSelectionEvent event) {
                    int rowIndex = table.getSelectedRow();
                    if (rowIndex < 0) {
                    } else {
                    	JFreeChart chart = chartRenderer.
                    	createChart(hashMapData.get(new Integer(rowIndex)), 
                    			........);
                  	  
                    	if(chartContainer.getComponents() != null) 
                    		chartContainer.removeAll();    		  

                    	chartPanel = new ChartPanel(chart);    
                    	chartContainer.add(chartPanel);
                    	chartContainer.getParent().repaint();
                    	System.gc();
                    }
                }
            }
    );

...