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Java example source code file (bug7031551.java)

This example Java source code file (bug7031551.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

defaultcomboboxmodel, defaultlistcellrenderer, expected, gui, jcombobox, listcellrenderer, object, runtimeexception, string, suppresswarnings, swing, test3, test_element1, test_element2, test_element3, util, vector

The bug7031551.java Java example source code

/*
 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/* @test
 * @bug 7031551
 * @summary Generics: JComboBox
 * @author Pavel Porvatov
 */

import javax.swing.*;
import java.util.Vector;

public class bug7031551 {

    private static final String TEST_ELEMENT1 = "Test1";
    private static final String TEST_ELEMENT2 = "Test2";
    private static final String TEST_ELEMENT3 = "Test3";

    /**
     * @param args the command line arguments
     */
    @SuppressWarnings("unchecked")
    public static void main(String[] args) {
        testRawSignatures();
        testGenericSignatures();
    }

    @SuppressWarnings("unchecked")
    private static void testRawSignatures() {
        // Test JComboBox
        ComboBoxModel rawTestModel = new DefaultComboBoxModel();

        JComboBox rawTestComboBox = new JComboBox();
        rawTestComboBox = new JComboBox(rawTestModel);
        rawTestComboBox = new JComboBox(new Object[]{TEST_ELEMENT1});
        rawTestComboBox = new JComboBox(new Vector());

        Object unused1 = rawTestComboBox.getPrototypeDisplayValue();
        rawTestComboBox.setPrototypeDisplayValue(TEST_ELEMENT1);

        ListCellRenderer unused2 = rawTestComboBox.getRenderer();
        rawTestComboBox.setRenderer(new DefaultListCellRenderer());

        ComboBoxModel unused3 = rawTestComboBox.getModel();
        rawTestComboBox.setModel(rawTestModel);

        rawTestComboBox.addItem(TEST_ELEMENT2);
        rawTestComboBox.insertItemAt(TEST_ELEMENT3, 1);
        rawTestComboBox.removeItem(TEST_ELEMENT2);
        assertEquals(rawTestComboBox.getItemAt(0), TEST_ELEMENT3);
        rawTestComboBox.removeAllItems();

        // Test DefaultComboBoxModel
        DefaultComboBoxModel testModel = new DefaultComboBoxModel();
        testModel = new DefaultComboBoxModel(new Vector());
        testModel = new DefaultComboBoxModel(new Object[]{TEST_ELEMENT1});

        testModel.addElement(TEST_ELEMENT2);
        testModel.insertElementAt(TEST_ELEMENT3, 1);
        assertEquals(testModel.getElementAt(2), TEST_ELEMENT2);
    }

    private static void testGenericSignatures() {
        // Test JComboBox
        ComboBoxModel<String> stringTestModel = new DefaultComboBoxModel();

        JComboBox<String> stringTestComboBox = new JComboBox();
        stringTestComboBox = new JComboBox<String>(stringTestModel);
        stringTestComboBox = new JComboBox<String>(new String[]{TEST_ELEMENT1});
        stringTestComboBox = new JComboBox<String>(new Vector());

        String unused1 = stringTestComboBox.getPrototypeDisplayValue();
        stringTestComboBox.setPrototypeDisplayValue(TEST_ELEMENT1);

        ListCellRenderer<? super String> unused2 = stringTestComboBox.getRenderer();
        stringTestComboBox.setRenderer(new DefaultListCellRenderer());

        ComboBoxModel unused3 = stringTestComboBox.getModel();
        stringTestComboBox.setModel(stringTestModel);

        stringTestComboBox.addItem(TEST_ELEMENT2);
        stringTestComboBox.insertItemAt(TEST_ELEMENT3, 1);
        stringTestComboBox.removeItem(TEST_ELEMENT2);
        assertEquals(stringTestComboBox.getItemAt(0), TEST_ELEMENT3);
        stringTestComboBox.removeAllItems();

        // Test DefaultComboBoxModel
        DefaultComboBoxModel<String> testModel = new DefaultComboBoxModel();
        testModel = new DefaultComboBoxModel<String>(new Vector());
        testModel = new DefaultComboBoxModel<String>(new String[]{TEST_ELEMENT1});

        testModel.addElement(TEST_ELEMENT2);
        testModel.insertElementAt(TEST_ELEMENT3, 1);
        assertEquals(testModel.getElementAt(2), TEST_ELEMENT2);
    }

    private static void assertEquals(Object expectedObject, Object actualObject) {
        if (!expectedObject.equals(actualObject)) {
            throw new RuntimeException("Expected: " + expectedObject + " but was: " + actualObject);
        }
    }
}

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