Here you can find the source of imageOf(Action action)
public static Image imageOf(Action action)
//package com.java2s; /*//from w w w.jav a 2 s . c om * SleepArchiver - cross-platform data manager for Sleeptracker-series watches. * Copyright (C) 2009-2011 Pavel Fatin <http://pavelfatin.com> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import javax.swing.*; import java.awt.*; public class Main { public static Image imageOf(Action action) { ImageIcon icon = (ImageIcon) action.getValue(AbstractAction.SMALL_ICON); return icon == null ? null : icon.getImage(); } }