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FillingLists.java
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35 lines (33 loc) · 1013 Bytes
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// collectiontopics/FillingLists.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Collections.fill() & Collections.nCopies()
import java.util.*;
class StringAddress {
private String s;
StringAddress(String s) { this.s = s; }
@Override
public String toString() {
return super.toString() + " " + s;
}
}
public class FillingLists {
public static void main(String[] args) {
List<StringAddress> list = new ArrayList<>(
Collections.nCopies(4,
new StringAddress("Hello")));
System.out.println(list);
Collections.fill(list,
new StringAddress("World!"));
System.out.println(list);
}
}
/* Output:
[StringAddress@15db9742 Hello, StringAddress@15db9742
Hello, StringAddress@15db9742 Hello,
StringAddress@15db9742 Hello]
[StringAddress@6d06d69c World!, StringAddress@6d06d69c
World!, StringAddress@6d06d69c World!,
StringAddress@6d06d69c World!]
*/