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:
// Java program to demonstrate // fill() method // for String value import java.util.*;
public class GFG1 {
public static void main(String[] argv) throws Exception
{
// creating object of List<Integer>
List<String> arrlist = new ArrayList<String>();
// Adding element to srclst
arrlist.add( "A" );
arrlist.add( "B" );
arrlist.add( "C" );
// print the elements
System.out.println( "List elements before fill: "
+ arrlist);
// fill the list
Collections.fill(arrlist, "TAJMAHAL" );
// print the elements
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:
// Java program to demonstrate // fill() method // for Integer value import java.util.*;
public class GFG1 {
public static void main(String[] argv) throws Exception
{
// creating object of List<Integer>
List<Integer> arrlist = new ArrayList<Integer>();
// Adding element to srclst
arrlist.add( 20 );
arrlist.add( 30 );
arrlist.add( 40 );
// print the elements
System.out.println( "List elements before fill: "
+ arrlist);
// fill the list
Collections.fill(arrlist, 500 );
// print the elements
System.out.println( "\nList elements after fill: "
+ arrlist);
}
} |
Output:
List elements before fill: [20, 30, 40] List elements after fill: [500, 500, 500]