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‎HashSetDemo15a.java

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import java.util.HashSet;
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public class HashSetDemo15a {
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public static void main(String[] args) {
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HashSet<String> set1 = new HashSet<>();
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HashSet<Integer> set2 = new HashSet<>();
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set1.add("A");
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set1.add("a");
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set1.add("B");
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set1.add("b");
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set1.add("C");
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set1.add("c");
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set2.add(1);
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set2.add(2);
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set2.add(3);
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set2.add(4);
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set2.add(5);
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set2.add(6);
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set1.stream().flatMapToDouble(s -> s.chars().mapToDouble(c -> c)).forEach(c -> System.out.println(c));
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set1.stream().flatMapToInt(s -> s.chars()).forEach(c -> System.out.println(c));
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set2.stream().flatMapToInt(s -> s.toString().chars()).forEach(c -> System.out.println(c));
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set1.stream().flatMapToLong(s -> s.chars().mapToLong(c->c)).forEach(c -> System.out.println(c));
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set2.stream().flatMapToLong(s -> s.toString().chars().mapToLong(c -> c)).forEach(c -> System.out.println(c));
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}
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}

‎HashSetDemo15aa.java

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import java.util.HashSet;
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public class HashSetDemo15aa {
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public static void main(String[] args) {
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HashSet<String> set1 = new HashSet<>();
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HashSet<Integer> set2 = new HashSet<>();
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set1.add("A");
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set1.add("a");
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set1.add("B");
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set1.add("b");
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set1.add("C");
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set1.add("c");
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set2.add(1);
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set2.add(2);
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set2.add(3);
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set2.add(4);
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set2.add(5);
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set2.add(6);
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set1.stream().mapToDouble(s -> s.chars().mapToDouble(c -> c).sum()).forEach(c -> System.out.println(c));
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set1.stream().mapToInt(s -> s.chars().sum()).forEach(c -> System.out.println(c));
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set2.stream().mapToInt(s -> s.toString().chars().sum()).forEach(c -> System.out.println(c));
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set1.stream().mapToLong(s -> s.chars().mapToLong(c -> c).sum()).forEach(c -> System.out.println(c));
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set2.stream().mapToLong(s -> s.toString().chars().mapToLong(c -> c).sum()).forEach(c -> System.out.println(c));
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}
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}

‎HashSetDemo15b.java

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import java.util.HashSet;
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import java.util.stream.Collectors;
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public class HashSetDemo15b {
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public static void main(String[] args) {
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HashSet<String> set1 = new HashSet<>();
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HashSet<Integer> set2 = new HashSet<>();
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set2.add(1);
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set2.add(2);
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set2.add(3);
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set2.add(4);
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set1.add("A");
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set1.add("a");
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set1.add("B");
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set1.add("b");
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set1.add("C");
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set1.add("c");
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set1.stream().collect(Collectors.toMap(s -> s, s -> s.chars().mapToDouble(c -> c).sum())).forEach((k, v) -> System.out.println(k + ":" + v));
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set2.stream().collect(Collectors.toMap(s -> s, s -> s)).forEach((k, v) -> System.out.println(k + ":" + v));
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}
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}

‎HashSetDemo15c.java

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import java.util.HashSet;
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public class HashSetDemo15c {
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public static void main(String[] args) {
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HashSet<Integer> set1 = new HashSet<>();
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HashSet<String> set2 = new HashSet<>();
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set1.add(1);
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set1.add(2);
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set1.add(3);
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set1.add(4);
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set2.add("A");
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set2.add("a");
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set2.add("B");
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set2.add("b");
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set2.add("C");
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set2.add("c");
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boolean b = set1.stream().allMatch(s -> s > 3);
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boolean c = set2.stream().allMatch(s -> s.equals("A"));
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boolean d = set2.stream().allMatch(s -> s.charAt(0) == 'A');
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System.out.println(b);
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System.out.println(c);
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System.out.println(d);
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}
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}

‎HashSetDemo15d.java

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import java.util.HashSet;
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public class HashSetDemo15d {
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public static void main(String[] args) {
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HashSet<Integer> set1 = new HashSet<>();
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HashSet<String> set2 = new HashSet<>();
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set1.add(1);
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set1.add(2);
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set1.add(3);
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set1.add(4);
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set2.add("A");
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set2.add("a");
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set2.add("B");
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set2.add("b");
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set2.add("C");
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set2.add("c");
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boolean b = set2.stream().anyMatch(s -> s.equals("A"));
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boolean c = set1.stream().anyMatch(s -> s > 3);
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boolean d = set2.stream().anyMatch(s -> s.charAt(0) == 'A');
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System.out.println(b);
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System.out.println(c);
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System.out.println(d);
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}
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}

‎HashSetDemo15e.java

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import java.util.HashSet;
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public class HashSetDemo15e {
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public static void main(String[] args) {
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HashSet<Integer> set1 = new HashSet<>();
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HashSet<String> set2 = new HashSet<>();
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set1.add(1);
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set1.add(2);
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set1.add(3);
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set1.add(4);
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set2.add("A");
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set2.add("a");
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set2.add("B");
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set2.add("b");
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set2.add("C");
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set2.add("c");
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boolean b = set2.stream().noneMatch(s -> s=="D");
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boolean c = set2.stream().noneMatch(s -> s == "A");
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System.out.println(b);
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System.out.println(c);
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}
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}

‎HashSetDemo15f.java

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import java.util.HashSet;
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public class HashSetDemo15f {
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public static void main(String[] args) {
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HashSet<Integer> set1 = new HashSet<>();
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HashSet<String> set2 = new HashSet<>();
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set1.add(1);
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set1.add(2);
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set1.add(3);
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set1.add(4);
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set2.add("A");
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set2.add("a");
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set2.add("B");
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set2.add("b");
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set2.add("C");
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set2.add("c");
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boolean b = set2.stream().noneMatch(s -> s == "D");
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boolean c = set2.stream().noneMatch(s -> s == "A");
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System.out.println(b);
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System.out.println(c);
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}
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}

‎HashSetDemo15g.java

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import java.util.HashSet;
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public class HashSetDemo15g {
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public static void main(String[] args) {
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HashSet<Integer> set1 = new HashSet<>();
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HashSet<String> set2 = new HashSet<>();
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set1.add(1);
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set1.add(2);
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set1.add(3);
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set1.add(4);
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set2.add("A");
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set2.add("a");
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set2.add("B");
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set2.add("b");
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set2.add("C");
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set2.add("c");
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boolean b = set2.stream().dropWhile(s -> s.length() == 1).allMatch(s -> s.length() == 1);
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boolean c = set2.stream().dropWhile(s -> s.length() == 1).noneMatch(s -> s.length() == 1);
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boolean d = set2.stream().dropWhile(s -> s == "A").anyMatch(s -> s== "A");
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System.out.println(b);
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System.out.println(c);
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System.out.println(d);
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}
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}

‎HashSetDemo15h.java

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import java.util.HashSet;
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public class HashSetDemo15h {
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public static void main(String[] args) {
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HashSet<Integer> set1 = new HashSet<>();
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HashSet<String> set2 = new HashSet<>();
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set1.add(1);
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set1.add(2);
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set1.add(3);
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set1.add(4);
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set2.add("A");
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set2.add("a");
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set2.add("B");
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set2.add("b");
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set2.add("C");
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set2.add("c");
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boolean b = set2.stream().distinct().anyMatch(s -> s.equals("A"));
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boolean c = set2.stream().distinct().allMatch(s -> s.length() == 1);
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boolean d = set2.stream().distinct().noneMatch(s -> s.length() == 1);
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System.out.println(b);
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System.out.println(c);
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System.out.println(d);
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}
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}

‎HashSetDemo15i.java

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import java.util.HashSet;
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import java.util.Spliterator;
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public class HashSetDemo15i {
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public static void main(String[] args) {
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HashSet<Integer> set1 = new HashSet<>();
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HashSet<String> set2 = new HashSet<>();
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set1.add(1);
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set1.add(2);
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set1.add(3);
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set1.add(4);
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set2.add("A");
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set2.add("a");
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set2.add("B");
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set2.add("b");
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set2.add("C");
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set2.add("c");
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boolean b = set2.spliterator().hasCharacteristics(Spliterator.ORDERED);
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boolean c = set2.stream().spliterator().hasCharacteristics(Spliterator.DISTINCT);
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boolean d = set2.stream().spliterator().hasCharacteristics(Spliterator.SORTED);
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boolean e = set2.stream().spliterator().hasCharacteristics(Spliterator.SIZED);
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boolean f = set2.stream().spliterator().hasCharacteristics(Spliterator.SUBSIZED);
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boolean g = set2.stream().spliterator().hasCharacteristics(Spliterator.NONNULL);
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boolean h = set2.stream().spliterator().hasCharacteristics(Spliterator.IMMUTABLE);
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boolean i = set2.stream().spliterator().hasCharacteristics(Spliterator.CONCURRENT);
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System.out.println(b);
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System.out.println(c);
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System.out.println(d);
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System.out.println(e);
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System.out.println(f);
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System.out.println(g);
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System.out.println(h);
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System.out.println(i);
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set1.stream().spliterator().tryAdvance(s -> System.out.println(s));
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set2.stream().spliterator().tryAdvance(s -> System.out.println(s));
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}
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}

‎HashSetDemo15j.java

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import java.util.HashSet;
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public class HashSetDemo15j {
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public static void main(String[] args) {
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HashSet<Integer> set1 = new HashSet<>();
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HashSet<String> set2 = new HashSet<>();
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set1.add(1);
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set1.add(2);
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set1.add(3);
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set1.add(4);
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set2.add("A");
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set2.add("a");
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set2.add("B");
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set2.add("b");
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set2.add("C");
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set2.add("c");
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set1.stream().iterator().forEachRemaining(System.out::println);
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set2.stream().iterator().forEachRemaining(System.out::println);
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set1.stream().iterator().forEachRemaining(s -> System.out.println(s));
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set2.stream().iterator().forEachRemaining(s -> System.out.println(s));
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}
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}

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