33 lines
1.0 KiB
Java
33 lines
1.0 KiB
Java
// understandingcollections/FillingLists.java
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// (c)2016 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
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// The Collections.fill() + Collections.nCopies() methods
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import java.util.*;
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class StringAddress {
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private String s;
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public StringAddress(String s) { this.s = s; }
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@Override
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public String toString() {
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return super.toString() + " " + s;
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}
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}
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public class FillingLists {
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public static void main(String[] args) {
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List<StringAddress> list = new ArrayList<>(
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Collections.nCopies(4, new StringAddress("Hello")));
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System.out.println(list);
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Collections.fill(list, new StringAddress("World!"));
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System.out.println(list);
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}
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}
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/* Output:
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[StringAddress@1db9742 Hello, StringAddress@1db9742 Hello,
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StringAddress@1db9742 Hello, StringAddress@1db9742 Hello]
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[StringAddress@106d69c World!, StringAddress@106d69c
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World!, StringAddress@106d69c World!, StringAddress@106d69c
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World!]
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*/
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