container.addContainerProperty(COLUMN1_PROPERTY_ID, String.class, "");
container.addContainerProperty(COLUMN2_PROPERTY_ID, String.class, "");
container.addContainerProperty(COLUMN3_PROPERTY_ID, String.class, "");
for (int i = 0; i < 100; i++) {
Item item = container.addItem("item " + i);
item.getItemProperty(COLUMN1_PROPERTY_ID).setValue("first" + i);
item.getItemProperty(COLUMN2_PROPERTY_ID).setValue("middle" + i);
item.getItemProperty(COLUMN3_PROPERTY_ID).setValue("last" + i);
}