1 /* 2 * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* @test 25 @key headful 26 @bug 6709913 27 @summary Verifies BasicComboBoxUI.isPopupVisible does not return NPE 28 @run main BasicComboNPE 29 */ 30 import javax.swing.SwingUtilities; 31 import javax.swing.JComboBox; 32 import javax.swing.UIManager; 33 import javax.swing.UnsupportedLookAndFeelException; 34 import javax.swing.ComboBoxModel; 35 import java.awt.IllegalComponentStateException; 36 37 public class BasicComboNPE extends JComboBox 38 { main(String[] args)39 public static void main(String[] args) { 40 for (UIManager.LookAndFeelInfo laf : UIManager.getInstalledLookAndFeels()) { 41 try { 42 System.out.println("Test for LookAndFeel " + laf.getClassName()); 43 UIManager.setLookAndFeel(laf.getClassName()); 44 new BasicComboNPE().getModel(); 45 } catch (IllegalComponentStateException | ClassNotFoundException | InstantiationException | 46 IllegalAccessException | UnsupportedLookAndFeelException e ) { 47 //System.out.println(e); 48 } 49 } 50 51 } 52 53 @Override getModel()54 public ComboBoxModel getModel() 55 { 56 setPopupVisible(false); 57 isPopupVisible(); 58 return super.getModel(); 59 } 60 } 61