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Operators and Assignments 

/* Missing statements ? */ 

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Practice Operators and Assignments – 

/* Missing statements ? */ 

public class NewTreeSet extends java.util.TreeSet {   

  public static void main(String [] args) {   

    java.util.TreeSet t = new java.util.TreeSet();        

    t.clear();   

  }    

  public void clear() {     

    TreeMap m = new TreeMap();   

    m.clear();   

  } 

}

which two statements, added independently at beginning of the program, allow the code to compile?

  1. No statement is required
  2. import java.util.*;

     

  3. import.java.util.Tree*;

     

  4. import java.util.TreeSet;

     

  5. import java.util.TreeMap;

     

/* Missing statements ? */ 

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Practice Operators and Assignments – 

/* Missing statements ? */ 

public class NewTreeSet extends java.util.TreeSet {   

  public static void main(String [] args) {   

    java.util.TreeSet t = new java.util.TreeSet();        

    t.clear();   

  }    

  public void clear() {     

    TreeMap m = new TreeMap();   

    m.clear();   

  } 

}

which two statements, added independently at beginning of the program, allow the code to compile?

  1. No statement is required
  2. import java.util.*;

     

  3. import.java.util.Tree*;

     

  4. import java.util.TreeSet;

     

  5. import java.util.TreeMap;

     

import java.awt.*; 

class Ticke

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Practice Operators and Assignments – 

import java.awt.*; 

class Ticker extends Component {     

  public static void main (String [] args) {         

    Ticker t = new Ticker();        

     /* Missing Statements ? */    

  } 

}

which two of the following statements, inserted independently, could legally be inserted into missing section of this code?

  1. boolean test = (Component instanceof t);
  2. boolean test = (t instanceof Ticker);
  3. boolean test = t.instanceof(Ticker);
  4. boolean test = (t instanceof Component);

Which of the following are true statements?

  1. The 

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Practice Operators and Assignments –

Which of the following are true statements?

  1. The Iterator interface declares only three methods: hasNext, next and remove.
  2. The ListIterator interface extends both the List and Iterator interfaces.
  3. The ListIterator interface provides forward and backward iteration capabilities.
  4. The ListIterator interface provides the ability to modify the List during iteration.
  5. The ListIterator interface provides the ability to determine its position in the List.
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