39 lines
1.2 KiB
Java
39 lines
1.2 KiB
Java
// collections/SetOperations.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://OnJava8.com for more book information.
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import java.util.*;
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public class SetOperations {
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public static void main(String[] args) {
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Set<String> set1 = new HashSet<>();
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Collections.addAll(set1,
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"A B C D E F G H I J K L".split(" "));
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set1.add("M");
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System.out.println("H: " + set1.contains("H"));
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System.out.println("N: " + set1.contains("N"));
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Set<String> set2 = new HashSet<>();
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Collections.addAll(set2, "H I J K L".split(" "));
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System.out.println(
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"set2 in set1: " + set1.containsAll(set2));
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set1.remove("H");
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System.out.println("set1: " + set1);
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System.out.println(
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"set2 in set1: " + set1.containsAll(set2));
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set1.removeAll(set2);
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System.out.println(
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"set2 removed from set1: " + set1);
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Collections.addAll(set1, "X Y Z".split(" "));
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System.out.println("'X Y Z' added to set1: " + set1);
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}
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}
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/* Output:
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H: true
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N: false
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set2 in set1: true
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set1: [A, B, C, D, E, F, G, I, J, K, L, M]
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set2 in set1: false
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set2 removed from set1: [A, B, C, D, E, F, G, M]
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'X Y Z' added to set1: [A, B, C, D, E, F, G, M, X, Y, Z]
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*/
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