Check if the array contains an object. - Java Collection Framework

Java examples for Collection Framework:Array Contain

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Description

Check if the array contains an object.

Demo Code

/*/*w w w  . j  av a 2s  .com*/
    Copyright 1996-2008 Ariba, Inc.

    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.

    $Id: //ariba/platform/util/core/ariba/util/core/ArrayUtil.java#9 $
 */
import java.io.PrintStream;
import java.util.List;

public class Main{
    public static void main(String[] argv) throws Exception{
        Object[] array = new String[]{"1","abc","level",null,"java2s.com","asdf 123"};
        Object x = "java2s.com";
        System.out.println(contains(array,x));
    }
    /**
        Check if the array contains an object.
        Object.equals() is used to compare objects.
        @param array the array to check
        @param x the object to check for
        @return true if the object is in the array

        @aribaapi public
     */
    public static boolean contains(Object[] array, Object x) {
        return -1 != indexOf(array, x);
    }
    /**
        Find the location of an object in the array
        Object.equals() is used to compare objects.
        @param array the array to check
        @param x The object to look for
        @return the index of the object, or -1 if it is not found

        @aribaapi public
     */
    public static int indexOf(Object[] array, Object x) {
        for (int i = 0; i < array.length; i++) {
            if (SystemUtil.equal(x, array[i])) {
                return i;
            }
        }
        return -1;
    }
}

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