в 17:43, 31 мая 2010

2010-05-31T17:43:48Z

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2010-05-31T14:10:56Z

1 версия

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== HashSet: addAll(Collection<?> c) ==



<source lang="java">

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
public class Main {
public static void main(String[] a) {
String elements[] = { "A", "B", "C", "D", "E" };
Set<String> set = new HashSet<String>(Arrays.asList(elements));
elements = new String[] { "E", "F" };
set.addAll(Arrays.asList(elements));
System.out.println(set);
}
}

</source>



== HashSet: add(E o) ==



<source lang="java">

/**
*Output:
[D, A, F, C, B, E]
*/
import java.util.HashSet;
public class MainClass {
public static void main(String args[]) {
HashSet<String> hs = new HashSet<String>();
hs.add("B");
hs.add("A");
hs.add("D");
hs.add("E");
hs.add("C");
hs.add("F");
System.out.println(hs);
}
}

</source>



== HashSet: clear() ==



<source lang="java">

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
public class Main {
public static void main(String[] a) {
String elements[] = { "A", "B", "C", "D", "E" };
Set<String> set = new HashSet<String>(Arrays.asList(elements));
elements = new String[] { "E", "F" };
set.addAll(Arrays.asList(elements));
System.out.println(set);
set.clear();
System.out.println(set);
}
}

</source>



== HashSet: clone() ==



<source lang="java">

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
public class Main {
public static void main(String[] a) {
String elements[] = { "A", "B", "C", "D", "E" };
Set<String> set = new HashSet<String>(Arrays.asList(elements));
Set set2 = ((Set) ((HashSet) set).clone());
System.out.println(set2);
}
}

</source>



== HashSet: containsAll(Collection<?> c) ==



<source lang="java">

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
public class Main {
public static void main(String[] a) {
String elements[] = { "A", "B", "C", "D", "E" };
Set<String> set = new HashSet<String>(Arrays.asList(elements));
elements = new String[] { "A", "B", "C" };
Set<String> set2 = new HashSet<String>(Arrays.asList(elements));
System.out.println(set.containsAll(set2));
}
}

</source>



== HashSet: contains(Object o) ==



<source lang="java">

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
public class Main {
public static void main(String[] a) {
String elements[] = { "A", "B", "C", "D", "E" };
Set<String> set = new HashSet<String>(Arrays.asList(elements));
System.out.println(set.contains("A"));
}
}

</source>



== HashSet: isEmpty() ==



<source lang="java">

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
public class Main {
public static void main(String[] a) {
String elements[] = { "A", "B", "C", "D", "E" };
Set<String> set = new HashSet<String>(Arrays.asList(elements));
System.out.println(set.isEmpty());
}
}

</source>



== HashSet: iterator() ==



<source lang="java">

import java.util.Arrays;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
public class Main {
public static void main(String[] a) {
String elements[] = { "A", "B", "C", "D", "E" };
Set<String> set = new HashSet<String>(Arrays.asList(elements));
Iterator iter = set.iterator();
while (iter.hasNext()) {
System.out.println(iter.next());
}
}
}

</source>



== HashSet: removeAll(Collection<?> c) ==



<source lang="java">

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
public class Main {
public static void main(String[] a) {
String elements[] = { "A", "B", "C", "D", "E" };
Set<String> set = new HashSet<String>(Arrays.asList(elements));
elements = new String[] { "B", "D", "F", "G", "1", "2", "3", "4" };
Set<String> set2 = new HashSet<String>(Arrays.asList(elements));
set.removeAll(set2);
System.out.println(set);
}
}

</source>



== HashSet: size() ==



<source lang="java">

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
public class Main {
public static void main(String[] a) {
String elements[] = { "A", "B", "C", "D", "E" };
Set<String> set = new HashSet<String>(Arrays.asList(elements));
System.out.println(set.size());
}
}

</source>



== HashSet: toArray() ==



<source lang="java">

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
public class Main {
public static void main(String[] a) {
String elements[] = { "A", "B", "C", "D", "E" };
Set<String> set = new HashSet<String>(Arrays.asList(elements));
Object[] arrObj = set.toArray();
for (int i = 0; i < arrObj.length; i++) {
System.out.println(arrObj[i]);
}
System.out.println(set);
}
}

</source>



== new HashSet(Collection<?> c) ==



<source lang="java">

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
public class Main {
public static void main(String[] args) {
List<String> myList = new ArrayList<String>();
myList.add("Hello");
myList.add("World");
myList.add("World");
Set<String> set = new HashSet<String>(myList);
System.out.println(set);
}
}

</source>



== new HashSet < E > () ==



<source lang="java">

/**
*Output:
[D, A, F, C, B, E]
*/
import java.util.HashSet;
public class MainClass {
public static void main(String args[]) {
HashSet<String> hs = new HashSet<String>();
hs.add("B");
hs.add("A");
hs.add("D");
hs.add("E");
hs.add("C");
hs.add("F");
System.out.println(hs);
}
}

</source>

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в 17:43, 31 мая 2010

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