
Big Java, Binder Ready Version: Early Objects
6th Edition
ISBN: 9781119056447
Author: Cay S. Horstmann
Publisher: WILEY
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Question
Chapter 16, Problem 16PP
Program Plan Intro
To implement a hash table with double hashing
Program plan:
- In a file “HashSet.java”, import necessary package, and create a class “HashSet”,
- Declare the array of “Object” type.
- Declare the necessary variable.
- Define the constructor to create a hash table.
- Create an array and set the current size to “0”.
- Define the method “toString()” that returns the string representation of array.
- Define the method “hash2()” that returns the hard-coded queue for the problem.
- Define the method “contains()”,
- Assign the hash code.
- Check the condition,
- If it is true, returns true.
- Create a loop,
-
- Compute the probe.
- Check the condition,
- If it is true, returns true.
- Check whether the bucket value contains null,
- If it is true, returns false.
- Returns false.
- If it is true, returns true.
- Define the method “getHashCode()”,
- Assign the hash code.
- Check whether the value is less than “0”,
- If it is true, assign the negative value.
- Update the hash value.
- Return the hash code.
- If it is true, assign the negative value.
- Define the method “add()”
- Check whether there is a room before probing,
- If it is true, call the method “resizeTable()()”.
- Assign the hash code returned from the method “getHashCode()”.
- Check whether the has value is a null,
-
- If it is true, assign the object properties.
- Otherwise, execute a loop,
-
- Compute the quadratic probe.
- Check whether the bucket contains null value,
- If it is true, assign the object properties.
- Use break statement.
- Otherwise, Check the condition,
- Returns false.
- Increment the current size.
- Returns true.
- If it is true, call the method “resizeTable()()”.
- Check whether there is a room before probing,
- Define the method “remove()” to remove the object from the set,
- Get the hash code.
- Set the position to “-1”.
- Check the condition,
- If it is true, assign the hash code to position.
- Create a loop,
-
- Compute the probe.
- Check the condition, set the new position.
- Check whether the position value is “-1”,
-
- If it is true, returns false.
- If the item found, find the last item in the rest of the probing sequence.
- Create a loop,
-
- Compute the probe.
- Check whether the current bucket value contains null,
- If it is true, use break.
- Otherwise, check the condition,
- If it is true, assign the current value to as last index.
- Check whether the last index is “-1”,
-
- If it is true, assign the null value and decrement the size.
- Otherwise, assign the last index value to the current position.
- Assign null value to last index.
- Create a loop to rehash the table,
-
- Compute the probe.
- Check the condition,
- If it is true, break the loop.
- Assign the current bucket value to object.
- Assign null value to bucket.
- Decrement current size.
- Call the method “add()”.
- Returns true.
- If it is true, assign the hash code to position.
- Define the method “iterator()” that returns an iterator that traverses the elements of the set.
- Define the method “size()” to return the size.
- Define the method “resizeTable()”,
- Create an object.
- Copy the bucket to the object array.
- Assign the value to the bucket.
- Set the current size to “0”.
- Create a loop,
- Check the condition,
- If it is true, call the method “add()”.
- Check the condition,
- Create a class “HashSetIterator”,
- Declare the variable to denote bucket index.
- Define the constructor that creates a hash set iterator that points to the first element of the hash set.
- Define the method “hasNext ()”,
- Create a loop,
- Check the condition,
-
- Returns true.
- Returns false.
- Create a loop,
- Define the method “next ()”,
- Execute the statement without checking the condition,
- Increment the index.
- Check the condition,
-
- If it is true, create an object for “NoSuchElementException”.
- Check whether the current bucket value contains null,
- Return the value.
- Execute the statement without checking the condition,
- Define the method “remove()”,
- Throw an exception “UnsupportedOperationException”.
- In a file “HashSetTest.java”, create a class “HashSetTest”,
- Define the method “main()”,
- Create an object for “HashSet”.
- Add the name “Harry” into the set.
- Add the name “Romeo” into the set.
- Add the name “Susannah” into the set.
- Add the name “Sarah” into the set.
- Add the name “Adam” into the set.
- Add the name “Larry” into the set.
- Print the set.
- Print the expected output.
- Remove “Susannah” from the set.
- Print the set and expected result.
- Check whether “Adam” is in the set and print the result.
- Print the expected result.
- Define the method “main()”,
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Chapter 16 Solutions
Big Java, Binder Ready Version: Early Objects
Ch. 16.1 - Prob. 1SCCh. 16.1 - Prob. 2SCCh. 16.1 - Prob. 3SCCh. 16.1 - Prob. 4SCCh. 16.1 - Prob. 5SCCh. 16.1 - Prob. 6SCCh. 16.1 - Prob. 7SCCh. 16.2 - Prob. 8SCCh. 16.2 - Prob. 9SCCh. 16.2 - Prob. 10SC
Ch. 16.2 - Prob. 11SCCh. 16.2 - Prob. 12SCCh. 16.3 - Prob. 13SCCh. 16.3 - Prob. 14SCCh. 16.3 - Prob. 15SCCh. 16.3 - Prob. 16SCCh. 16.3 - Prob. 17SCCh. 16.3 - Prob. 18SCCh. 16.4 - Prob. 19SCCh. 16.4 - Prob. 20SCCh. 16.4 - Prob. 21SCCh. 16.4 - Prob. 22SCCh. 16.4 - Prob. 23SCCh. 16.4 - Prob. 24SCCh. 16 - Prob. 1RECh. 16 - Prob. 2RECh. 16 - Prob. 3RECh. 16 - Prob. 4RECh. 16 - Prob. 5RECh. 16 - Prob. 6RECh. 16 - Prob. 7RECh. 16 - Prob. 8RECh. 16 - Prob. 9RECh. 16 - Prob. 10RECh. 16 - Prob. 11RECh. 16 - Prob. 12RECh. 16 - Prob. 13RECh. 16 - Prob. 14RECh. 16 - Prob. 15RECh. 16 - Prob. 16RECh. 16 - Prob. 17RECh. 16 - Prob. 18RECh. 16 - Prob. 19RECh. 16 - Prob. 20RECh. 16 - Prob. 21RECh. 16 - Prob. 22RECh. 16 - Prob. 23RECh. 16 - Prob. 24RECh. 16 - Prob. 25RECh. 16 - Prob. 26RECh. 16 - Prob. 1PECh. 16 - Prob. 2PECh. 16 - Prob. 3PECh. 16 - Prob. 4PECh. 16 - Prob. 5PECh. 16 - Prob. 6PECh. 16 - Prob. 7PECh. 16 - Prob. 8PECh. 16 - Prob. 9PECh. 16 - Prob. 10PECh. 16 - Prob. 11PECh. 16 - Prob. 12PECh. 16 - Prob. 13PECh. 16 - Prob. 14PECh. 16 - Prob. 15PECh. 16 - Prob. 16PECh. 16 - Prob. 17PECh. 16 - Prob. 18PECh. 16 - Prob. 19PECh. 16 - Prob. 20PECh. 16 - Prob. 21PECh. 16 - Prob. 1PPCh. 16 - Prob. 2PPCh. 16 - Prob. 3PPCh. 16 - Prob. 4PPCh. 16 - Prob. 5PPCh. 16 - Prob. 6PPCh. 16 - Prob. 7PPCh. 16 - Prob. 8PPCh. 16 - Prob. 9PPCh. 16 - Prob. 10PPCh. 16 - Prob. 11PPCh. 16 - Prob. 12PPCh. 16 - Prob. 13PPCh. 16 - Prob. 14PPCh. 16 - Prob. 15PPCh. 16 - Prob. 16PPCh. 16 - Prob. 17PP
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