util/Collections/Frequency.java

/*
 * Copyright (c) 2003, 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     4193200
 * @summary Basic test for Collections.frequency
 * @author  Josh Bloch
 */

import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;

public class Frequency {
    static final int N = 100;
    public static void main(String[] args) {
        test(new ArrayList<Integer>());
        test(new LinkedList<Integer>());
    }

    static void test(List<Integer> list) {
        for (int i = 0; i < N; i++)
            for (int j = 0; j < i; j++)
                list.add(i);
        Collections.shuffle(list);

        for (int i = 0; i < N; i++)
            if (Collections.frequency(list, i) != i)
                throw new RuntimeException(list.getClass() + ": " + i);
    }
}
Revision:	1.7
Committed:	Mon Jan 8 03:12:03 2018 UTC (6 years, 4 months ago) by jsr166
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.6:	+4 -1 lines
Log Message:	organize imports
#	User	Rev	Content
1	jsr166	1.1	/*
2	jsr166	1.2	* Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved.
3	jsr166	1.1	* 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	jsr166	1.2	* 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	jsr166	1.1	*/
23
24			/*
25			* @test
26			* @bug 4193200
27			* @summary Basic test for Collections.frequency
28			* @author Josh Bloch
29			*/
30
31	jsr166	1.7	import java.util.ArrayList;
32			import java.util.Collections;
33			import java.util.LinkedList;
34			import java.util.List;
35	jsr166	1.1
36			public class Frequency {
37	jsr166	1.3	static final int N = 100;
38	jsr166	1.6	public static void main(String[] args) {
39	jsr166	1.1	test(new ArrayList<Integer>());
40			test(new LinkedList<Integer>());
41			}
42
43			static void test(List<Integer> list) {
44			for (int i = 0; i < N; i++)
45			for (int j = 0; j < i; j++)
46			list.add(i);
47			Collections.shuffle(list);
48
49			for (int i = 0; i < N; i++)
50			if (Collections.frequency(list, i) != i)
51			throw new RuntimeException(list.getClass() + ": " + i);
52			}
53			}