Java Collections - Collections.fill() Examples

[Last Updated: Nov 8, 2025]

Class:

java.util.Collections

Method:

public static <T> void fill(List<? super T> list,
                            T obj)

Replaces all of the elements of the specified list with the specified element.

Examples

package com.logicbig.example.collections;

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

public class FillExample {

    public static void main(String... args) {
        List<Integer> list = new ArrayList<>();
        list.add(1);
        list.add(2);
        list.add(3);
        System.out.println(list);

        Collections.fill(list, 100);
        System.out.println(list);
    }
}

Output

[1, 2, 3]
[100, 100, 100]

Java Collections - Collections.fill() Examples

Class:

Method:

Examples

Output

See Also