Master the comments and practical skills of the 'DS' framework in the Java library
Master the comments and practical skills of the 'DS' framework in the Java library
Overview:
In Java programming, Libraries are a set of pre -written code to provide modular functions that provide common functions.One of the very popular and commonly used libraries is the DS framework (or data structure framework), which provides a series of data structures and algorithms.When using the DS framework, understanding comments and practical skills can help us better understand and use the functions in the framework.This article will introduce some annotations and practical skills about the 'DS' framework in the Java class library.
1. Notes
1. Add class-level annotation: For each class, it is recommended to add class-level comments to explain the purpose, function, design ideas of the class.For example:
/**
* Implementation of linked data structure.
* This class provides basic operations such as insertion, delete and search elements.
*/
public class LinkedList<T> {
// ...
}
2. Add method-level annotation: For each method, it is recommended to add method-level annotation (Method-Level Comments) to explain the function, parameters, return values, and possible abnormalities of the method.For example:
/**
* Insert an element at the end of the linked list.
*
* @param Element to insert the element
*/
public void append(T element) {
// ...
}
3. Add row annotations: Add line-level comments to the key part of the code to explain and supplement the code.For example:
int size = 0; // The current size of the linked list
2. Practical skills
1. Understand the implementation of common data structures: DS frameworks usually provide common data structures, such as linked lists, stacks, queues, binary trees, etc.Through the implementation code of these data structures in the reading framework, the understanding and operation principle of internal implementation and operating can be deepened.
2. Familiar API document in the framework: The DS framework usually provides detailed API documents, which includes detailed instructions and usage examples of class, interfaces, and methods.Familiar with these API documents can help us better understand the functions provided by the framework and use the class and methods correctly.
3. Debugging and testing: When using the DS framework, it is recommended to perform debugging and testing to ensure the correctness and stability of the code.You can use a breakpoint debugging tool (such as Eclipse or Intellij IDEA) to make a single -step debugging code to observe the change of the data structure and the execution process of the algorithm.
Example code:
Below is an example code implemented in the linked list in the DS framework, which demonstrates the application of annotations and some practical skills:
/**
* Implementation of linked data structure.
* This class provides basic operations such as insertion, delete and search elements.
*/
public class LinkedList<T> {
Private Node <t> Head; // Linked list node
Private int size; // The current size of the linked list
/**
* Insert an element at the end of the linked list.
*
* @param Element to insert the element
*/
public void append(T element) {
Node<T> newNode = new Node<>(element);
if (head == null) {
head = newNode;
} else {
Node<T> current = head;
while (current.next != null) {
current = current.next;
}
current.next = newNode;
}
size++;
}
/**
* Delete the specified element from the linked list.
*
* @param Element to delete the element
* @Return true means that the deletion is successful, and false means that the element does not exist
*/
public boolean remove(T element) {
Node<T> current = head;
Node<T> previous = null;
while (current != null) {
if (current.data.equals(element)) {
if (previous == null) {
head = current.next;
} else {
previous.next = current.next;
}
size--;
return true;
}
previous = current;
current = current.next;
}
return false;
}
// ...
/**
* Links node classes.
*
* @param <t> Node element type
*/
private static class Node<T> {
Private t data; // node data
Private node <t> Next; // Next node
public Node(T data) {
this.data = data;
}
}
}
Summarize:
Mastering the comments and practical techniques of the 'DS' framework in the Java library is very important for developers.Through good annotation habits, the readability and maintenance of code can be increased.At the same time, through the implementation of common data structures and the familiarity of the framework API documentation, we can better use the functions provided by the DS framework.It is hoped that the annotations and practical skills provided in this article will help you when you use the "DS 'framework in the Java class library.
