Here you can find the source of imageWithBackground(ImageIcon icon, Color colorBg)
public static ImageIcon imageWithBackground(ImageIcon icon, Color colorBg)
//package com.java2s; /******************************************************************************* * Copyright 2017 Veronica Anokhina.//from www. j a v a2 s .c o m * * 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.Color; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import javax.swing.ImageIcon; public class Main { public static ImageIcon imageWithBackground(ImageIcon icon, Color colorBg) { if (icon != null) { BufferedImage bi = new BufferedImage(icon.getIconWidth(), icon.getIconHeight(), BufferedImage.TYPE_INT_ARGB); Graphics2D ig2 = bi.createGraphics(); if (colorBg != null) { ig2.setColor(colorBg); ig2.fillRect(0, 0, icon.getIconWidth(), icon.getIconHeight()); } ig2.drawImage(icon.getImage(), 0, 0, icon.getIconWidth(), icon.getIconHeight(), null); return new ImageIcon(bi); } return icon; } }