Collections fill() method in Java with Examples
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]
Last Updated :
07 Jul, 2020
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