Converts a sub-range of the given array to an ArrayList of the appropriate type. - Android java.lang

Android examples for java.lang:array convert

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Description

Converts a sub-range of the given array to an ArrayList of the appropriate type.

Demo Code

/*/*from   w  ww.j  a  va2s.c om*/
 * Copyright (C) 2012 The Android Open Source Project
 *
 * 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.
 */
import com.android.inputmethod.annotations.UsedForTesting;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Map;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;

public class Main{
    /**
     * Converts a sub-range of the given array to an ArrayList of the appropriate type.
     * @param array Array to be converted.
     * @param start First index inclusive to be converted.
     * @param end Last index exclusive to be converted.
     * @throws IllegalArgumentException if start or end are out of range or start > end.
     */
    @Nonnull
    public static <E> ArrayList<E> arrayAsList(@Nonnull final E[] array,
            final int start, final int end) {
        if (start < 0 || start > end || end > array.length) {
            throw new IllegalArgumentException("Invalid start: " + start
                    + " end: " + end + " with array.length: "
                    + array.length);
        }

        final ArrayList<E> list = new ArrayList<>(end - start);
        for (int i = start; i < end; i++) {
            list.add(array[i]);
        }
        return list;
    }
}

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