Welcome to the java util MCQs Page
Dive deep into the fascinating world of java util with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of java util, a crucial aspect of Java Programming. In this section, you will encounter a diverse range of MCQs that cover various aspects of java util, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Java Programming.
Check out the MCQs below to embark on an enriching journey through java util. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Java Programming.
Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of java util. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!
java util MCQs | Page 16 of 18
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import java.util.*;
class Collection_Algos
{
public static void main(String args[])
{
LinkedList list = new LinkedList();
list.add(new Integer(2));
list.add(new Integer(8));
list.add(new Integer(5));
list.add(new Integer(1));
Iterator i = list.iterator();
while(i.hasNext())
System.out.print(i.next() + " ");
}
} import java.util.*;
class Collection_Algos
{
public static void main(String args[])
{
LinkedList list = new LinkedList();
list.add(new Integer(2));
list.add(new Integer(8));
list.add(new Integer(5));
list.add(new Integer(1));
Iterator i = list.iterator();
Collections.reverse(list);
while(i.hasNext())
System.out.print(i.next() + " ");
}
} import java.util.*;
class Output
{
public static void main(String args[])
{
ArrayList obj = new ArrayList();
obj.add("A");
obj.ensureCapacity(3);
System.out.println(obj.size());
}
} class Output
{
public static void main(String args[])
{
ArrayList obj = new ArrayList();
obj.add("A");
obj.add("D");
obj.ensureCapacity(3);
obj.trimToSize();
System.out.println(obj.size());
}
} import java.util.*;
class Output
{
public static void main(String args[])
{
HashSet obj = new HashSet();
obj.add("A");
obj.add("B");
obj.add("C");
System.out.println(obj + " " + obj.size());
}
} import java.util.*;
class Output
{
public static void main(String args[])
{
TreeSet t = new TreeSet();
t.add("3");
t.add("9");
t.add("1");
t.add("4");
t.add("8");
System.out.println(t);
}
} import java.util.*;
class Maps
{
public static void main(String args[])
{
HashMap obj = new HashMap();
obj.put("A", new Integer(1));
obj.put("B", new Integer(2));
obj.put("C", new Integer(3));
System.out.println(obj.get("B"));
}
} import java.util.*;
class Maps
{
public static void main(String args[])
{
TreeMap obj = new TreeMap();
obj.put("A", new Integer(1));
obj.put("B", new Integer(2));
obj.put("C", new Integer(3));
System.out.println(obj.entrySet());
}
}Suggested Topics
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