Collections fill() method in Java with Examples
Last Updated :
07 Jul, 2020
The fill() method of java.util.Collections class is used to replace all of the elements of the specified list with the specified element.
This method runs in linear time.
Syntax:
public static void fill(List list, T obj)
Parameters: This method takes following argument as parameter
- list – the list to be filled with the specified element.
- obj – The element with which to fill the specified list.
Below are the examples to illustrate the fill() method
Example 1:
import java.util.*;
public class GFG1 {
public static void main(String[] argv) throws Exception
{
List<String> arrlist = new ArrayList<String>();
arrlist.add( "A" );
arrlist.add( "B" );
arrlist.add( "C" );
System.out.println( "List elements before fill: "
+ arrlist);
Collections.fill(arrlist, "TAJMAHAL" );
System.out.println( "\nList elements after fill: "
+ arrlist);
}
}
|
Output:
List elements before fill: [A, B, C]
List elements after fill: [TAJMAHAL, TAJMAHAL, TAJMAHAL]
Example 2:
import java.util.*;
public class GFG1 {
public static void main(String[] argv) throws Exception
{
List<Integer> arrlist = new ArrayList<Integer>();
arrlist.add( 20 );
arrlist.add( 30 );
arrlist.add( 40 );
System.out.println( "List elements before fill: "
+ arrlist);
Collections.fill(arrlist, 500 );
System.out.println( "\nList elements after fill: "
+ arrlist);
}
}
|
Output:
List elements before fill: [20, 30, 40]
List elements after fill: [500, 500, 500]
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