Java Collection Element Get getByIndex(Collection vals, int idx)

Description

Gets collection value by index.

License

Open Source License

Parameter

Parameter	Description
vals	Collection of values.
idx	Index of value in the collection.
T	Type of collection values.

Return

Value at the given index.

Declaration

public static <T> T getByIndex(Collection<T> vals, int idx) 

Method Source Code

//package com.java2s;
/* /*from   w  w  w . j a va2s  .  c om*/
 Copyright (C) GridGain Systems. All Rights Reserved.
     
 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 java.util.*;

public class Main {
    /**
     * Gets collection value by index.
     *
     * @param vals Collection of values.
     * @param idx Index of value in the collection.
     * @param <T> Type of collection values.
     * @return Value at the given index.
     */
    public static <T> T getByIndex(Collection<T> vals, int idx) {
        assert idx < vals.size();

        int i = 0;

        for (T val : vals) {
            if (idx == i)
                return val;

            i++;
        }

        assert false : "Should never be reached.";

        return null;
    }
}

Related

1. getAsString(Collection data, char seperator)
2. getAsString(Collection input)
3. getAt(Collection col, int index)
4. getAuthzNameFromEntityName(String entityName, Collection authzProvidersNames)
5. getByIndex(Collection