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Sea vastavusse liidese Collection meetod ja operatsiooni tulemus.
Mis ilmub ekraanile?
import java.util.LinkedHashMap;import java.util.Map;public class TestLinkedHashMap { public static void main(String[] args) { Map<String, Integer> kujutus = new LinkedHashMap<>(); kujutus.put("B", 2); kujutus.put("A", 1); kujutus.put("C", 3); System.out.println(kujutus.values()); }}
Mis ilmub ekraanile?
import java.util.*;public class MinuComparator implements Comparator<String> { public int compare(String a, String b) { return b.compareTo(a); }}
import java.util.Set;import java.util.TreeSet;public class CompDemo { public static void main(String args[]) { Set<String> ts = new TreeSet<>(new MinuComparator()); ts.add("C"); ts.add("A"); ts.add("E"); ts.add("D"); for (String o : ts) System.out.print(o + " "); }}
Milline väide on tõene?
Kuidas eemaldada korduvad elemendid listist meielist?
Mis on erinevus TreeSet ja SortedSet vahel?
Mis ilmub ekraanile?
import java.util.Set;import java.util.TreeSet;public class TestTreeSet { public static void main(String[] args) { Set<String> hulk = new TreeSet<>(); hulk.add("2"); hulk.add("9"); hulk.add("5"); hulk.add("22"); hulk.add("1"); hulk.add("15"); System.out.println(hulk); }}
Mis ilmub ekraanile?
import java.util.HashMap;import java.util.Map;public class TestHashMap { public static void main(String[] args) { Map<String, Integer> kujutus = new HashMap<>(); kujutus.put("A", 1); kujutus.put("B", 2); kujutus.put("C", 3); System.out.println(kujutus.keySet()); }}
Millised read väljastatakse ekraanile?
int a = 0;try { System.out.println("Üks"); a = 1/1; System.out.println("Kaks");} catch (Exception e) { System.out.println("Kolm"); a = 1/0; System.out.println("Neli");} finally { System.out.println("Viis");}System.out.println("Kuus");
try { System.out.println("Üks"); int a = 1/0; System.out.println("Kaks"); throw new NullPointerException("Kolm");} catch (ArithmeticException e) { System.out.println("Neli");} catch (NullPointerException e) { System.out.println("Viis");} finally { System.out.println("Kuus");}System.out.println("Seitse");
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