Reexecutar Renderer JTable

ublic class TestCellRenderer extends JLabel implements TableCellRenderer {	
	List<Student> list=null;
	public TestCellRenderer(List<Student> l){
		super();
		   this.list=l;		
	}
	
	@Override
	public Component getTableCellRendererComponent(JTable table, Object object,boolean isSelected, boolean hasFocus, int row, int column) {	
		     Student s=list.get(row);
			if(s.getPoints()>=90)
		        	setIcon(new ImageIcon(getClass().getResource(okay_path)));
			if(s.getPoints()<90)
				setIcon(new ImageIcon(getClass().getResource(error_path)));    	    	
			    	     
		} 		
			setHorizontalAlignment(JLabel.CENTER);			
		return this;
	}

}

public JLabel setJLabel(int value){
		  JLabel l=new JLabel();
		       if(value>=90)
			 l.setIcon(new ImageIcon(getClass().getResource("...successpath")));
		       else if(value<90)
			 l.setIcon(new ImageIcon(getClass().getResource("...failedpath")));
		   return l;
}