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Objektorienteeritud programmeerimine (LTAT.03.003)

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Sea vastavusse liidese Collection meetod ja operatsiooni tulemus.

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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());

}

}
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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 + " ");

}

}
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Milline väide on tõene?

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Kuidas eemaldada korduvad elemendid listist meielist?

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Mis on erinevus TreeSet ja SortedSet vahel?

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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);

}

}
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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());

}

}
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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");

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Millised read väljastatakse ekraanile?

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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