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Java Collections - Collections.swap() Examples

Java Collections Java Java API

Class:

java.util.Collections

Method:

public static void swap(List<?> list,
                        int i,
                        int j)

Swaps the elements at the specified positions in the specified list.

Examples

package com.logicbig.example.collections;

import java.util.Arrays;
import java.util.Collections;
import java.util.List;

public class SwapExample {

    public static void main(String... args) {
        List<String> list = Arrays.asList("one", "two", "three", "four");
        System.out.println(list);

        Collections.swap(list, 1, 3);
        System.out.println(list);

    }
}

Output

[one, two, three, four]
[one, four, three, two]

See Also