Here you can find the source of getBufferedImage(ImageIcon icon)
public static BufferedImage getBufferedImage(ImageIcon icon)
//package com.java2s; /******************************************************************************* * Copyright 2017 Veronica Anokhina.//from ww w .j a va 2 s.c om * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *******************************************************************************/ import java.awt.Graphics2D; import java.awt.image.BufferedImage; import javax.swing.ImageIcon; public class Main { public static BufferedImage getBufferedImage(ImageIcon icon) { BufferedImage bi = new BufferedImage(icon.getIconWidth(), icon.getIconHeight(), BufferedImage.TYPE_INT_ARGB); Graphics2D ig2 = bi.createGraphics(); ig2.drawImage(icon.getImage(), 0, 0, icon.getIconWidth(), icon.getIconHeight(), null); return bi; } }