'Excalibur Collections' framework interpretation of technical principles in the Java library
Excalibur Collections is a Java -type library -based framework that provides some efficient data structures and algorithms to enhance the function of enhancing the Java set framework.This article will interpret the technical principles of the Excalibur Collection frame in the Java class library and provide some Java code examples.
The technical principles of the Excalibur Collections framework mainly include the following aspects:
1. Red Black Tree data structure: Excalibur Collection's framework uses red and black tree data structures to achieve some collection classes, such as TreeSet and TreeMap.Red and black trees are a self -balanced binary search tree, which maintains the characteristics of searching, inserting and deleting operations in the worst case that can still complete the search, inserting and deleting operations in the worst case.
The following is an example code for creating TreeSet and TreeMap using Excalibur Collections framework:
import org.eclipse.collections.impl.set.sorted.mutable.TreeSortedSet;
import org.eclipse.collections.impl.map.mutable.TreeSortedMap;
public class Main {
public static void main(String[] args) {
// Create TreeSet
TreeSortedSet<Integer> treeSet = TreeSortedSet.newSetWith(3, 1, 2);
System.out.println (TreeSet); // Output: [1, 2, 3]
// Create TreeMap
TreeSortedMap<String, Integer> treeMap = TreeSortedMap.newMapWith(
"first", 1,
"second", 2,
"third", 3
);
System.out.println (TreeMap); // Output: {first = 1, second = 2, third = 3}
}
}
2. Loltary data structure: Excalibur Collection's framework also provides some distribution -based sets, such as HashSet and HashMap.These collection classes use high -efficiency scattered algorithms for fast searching and storage elements.
The following is an example code for creating HashSet and HashMap using Excalibur Collections framework:
import org.eclipse.collections.impl.set.mutable.UnifiedSet;
import org.eclipse.collections.impl.map.mutable.UnifiedMap;
public class Main {
public static void main(String[] args) {
// Create HashSet
UnifiedSet<Integer> hashSet = UnifiedSet.newSetWith(3, 1, 2);
System.out.println (hashset); // Output: [1, 2, 3]
// Create hashmap
UnifiedMap<String, Integer> hashMap = UnifiedMap.newWithKeysValues(
"first", 1,
"second", 2,
"third", 3
);
System.out.println(hashMap); // 输出: {third=3, second=2, first=1}
}
}
3. Functional programming: EXCALIBUR Collections framework supports functional programming methods. You can use Lambda expressions or methods to reference the setting of the set to perform efficient traversal, filtering, and mapping.
The following is a sample code for functional programming using Excalibur Collections to perform functional programming:
import org.eclipse.collections.api.LazyIterable;
import org.eclipse.collections.api.list.MutableList;
import org.eclipse.collections.impl.list.mutable.FastList;
public class Main {
public static void main(String[] args) {
MutableList<Integer> numbers = FastList.newListWith(1, 2, 3, 4, 5);
// Traversing collection
numbers.each(number -> System.out.println(number)); // 输出: 1 2 3 4 5
// Filter collection
LazyIterable<Integer> filteredNumbers = numbers.select(number -> number % 2 == 0);
filteredNumbers.each(number -> System.out.println(number)); // 输出: 2 4
// Map collection
LazyIterable<Integer> doubledNumbers = numbers.collect(number -> number * 2);
doubledNumbers.each(number -> System.out.println(number)); // 输出: 2 4 6 8 10
}
}
In summary, the technical principles of the Excalibur Collections framework in the JAVA library include the use of red and black trees and latency data structures to achieve efficient set classes, as well as the collection of sets to support functional programming.Through these technical principles, developers can process and manage collection data more flexible and efficiently in the Java applications.
For more detailed information and usage about the Excalibur Collections framework, see the official documentation and example code.
