Java example source code file (Test6860438.java)

This example Java source code file (Test6860438.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

entry, gui, key, object, runtimeexception, set, string, swing, test6860438, util, value

The Test6860438.java Java example source code

/*
 * Copyright (c) 2009, 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 6860438
   @summary Tests various MultiUIDefaults methods
   @author Peter Zhelezniakov
   @run main Test6860438
*/

import java.util.Enumeration;
import java.util.Map.Entry;
import java.util.Set;
import javax.swing.UIManager;

public class Test6860438
{
    static final String KEY = "Test6860438.key";
    static final String VALUE = "Test6860438.value";

    void check(Object key, Object value, boolean present, int size) {
        check(UIManager.get(key) == value, "UIManager.get()");
        check(UIManager.getDefaults().size() == size, "MultiUIDefaults.size()");

        checkEnumeration(UIManager.getDefaults().keys(),
                key, present, "MultiUIDefaults.keys()");
        checkEnumeration(UIManager.getDefaults().elements(),
                value, present, "MultiUIDefaults.elements()");

        // check MultiUIDefaults.entrySet()
        boolean found = false;
        Set<Entry entries = UIManager.getDefaults().entrySet();
        for (Entry<Object, Object> e: entries) {
            if (e.getKey() == key) {
                check(e.getValue() == value, "MultiUIDefaults.entrySet()");
                found = true;
            }
        }
        check(found == present, "MultiUIDefaults.entrySet()");
    }

    void checkEnumeration(Enumeration<Object> e, Object elem,
            boolean present, String error) {
        boolean found = false;
        while (e.hasMoreElements()) {
            if (e.nextElement() == elem) {
                found = true;
            }
        }
        check(found == present, error);
    }

    void check(boolean condition, String methodName) {
        if (! condition) {
            throw new RuntimeException(methodName + " failed");
        }
    }

    void test() {
        int size = UIManager.getDefaults().size();

        // create a new value, size increases
        UIManager.getLookAndFeelDefaults().put(KEY, VALUE);
        check(KEY, VALUE, true, size + 1);

        // override the value, size remains the same
        UIManager.put(KEY, VALUE);
        check(KEY, VALUE, true, size + 1);

        // remove the value, size decreases
        UIManager.getDefaults().remove(KEY);
        check(KEY, null, false, size);
    }

    public static void main(String[] args) {
        new Test6860438().test();
    }
}