Here you can find the source of createImageIcon(String path, Class resourceClass)
public static ImageIcon createImageIcon(String path, Class resourceClass)
//package com.java2s; /******************************************************************************* * Copyright 2017 Veronica Anokhina./* w w w . j a va 2 s . com*/ * * 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 javax.swing.ImageIcon; public class Main { public static ImageIcon createImageIcon(String path, Class resourceClass) { java.net.URL imgURL = resourceClass.getResource(path); if (imgURL != null) { return new ImageIcon(imgURL); } else { System.err.println("Couldn't find file: " + path); return null; } } }