How to use the DSH BitSet framework and example
How to use the DSH BitSet framework and example
Overview:
BitSet is a data structure used in Java for the storage position vector, which can represent a set of a fixed size, each of which corresponds to a unique index bit.DSH (DAI-SHANGHAI HASH, referred to as DSH) is a data structure based on Bloom Filter, which is used to quickly detect whether an element belongs to a collection.The DSH BitSet framework is a combination of BitSet and DSH, which provides the function of conducting efficient set operations and data to heavy data.
Instructions:
1. Introduce the DSH BitSet framework:
First, you need to add the dependency item of the DSH BitSet framework to the Java code.You can use maven and other construction tools to add the following dependencies to the pom.xml file:
<dependency>
<groupId>com.dai.shanghai</groupId>
<artifactId>dsh-bitset</artifactId>
<version>1.0.0</version>
</dependency>
2. Create a DSH BitSet object:
In the code, the DSH BitSet object can be created by using a constructor, and the size of the collection can be positioned.
import com.dai.shanghai.DshBitSet;
public class DshBitSetExample {
public static void main(String[] args) {
int Size = 100; // Set the size of the set position set
DshBitSet dshBitSet = new DshBitSet(size);
// Next, you can perform a bit set operation
}
}
3. Perform the operation of the bit set:
The DSH BitSet framework provides a series of methods for operating bit sets, including inserting elements, detecting elements, deleting elements, and so on.
-Stch -in element: Use the `ADD` method to set the element into the position.
DSHBITSET.ADD (3); // Insert element 3
-The test element exists: Using the `Contains` method can detect whether the specified element exists in the bit set.
Boolean exists = dshbitset.contains (3); // Whether there are elements 3 in the detection position collection, return True or False
-State the element: Use the `Remove` method to delete the specified element from the place.
DSHBITSET.RMove (3); // Delete element from the bit set 3
4. Data dependencies:
A common application of the DSH BitSet framework is to make data heavy.The following is a simple example based on DSH BitSet.
import com.dai.shanghai.DshBitSet;
public class DataDeduplicationExample {
public static void main(String[] args) {
String [] data = {"a", "b", "c", "a", "b", "d"}; // with repeated data
int size = data.Length; // Set the size of the set position
DshBitSet dshBitSet = new DshBitSet(size);
StringBuilder deduplicatedData = new StringBuilder();
for (String element : data) {
int Hash = Element.hashcode (); // Calculate the hash value of the element
if (!dshBitSet.contains(hash)) {
DSHBITSET.ADD (Hash); // Inserthhhhhhhhhhhhhhhhhhhhhhhhhh
defuplicateddata.append (Element) .appnd (""); // Add the element to
}
}
System.out.println ("" Data after removing weight: " + deduplicateddata.tostring ());
}
}
operation result:
Data after weighing: A B C D
In summary, the DSH BitSet framework provides high -efficiency operations and data derivatives of the square set.By using DSH BitSet, you can quickly collect operations, and can efficiently process data to avoid the existence of repeated items.For a large amount of data and data, the DSH BitSet framework is a tool worth considering and use.
