Solong Collections Framework: Use custom stack in Java
Solong Collections Framework: Use custom stack in Java
Overview:
Solong Collections is a Java framework that provides a set of custom data structures and algorithms to help developers handle data more conveniently.This article will focus on how to use the custom stack of the Solong Collections framework and provide some Java code examples.
What is a stack:
The stack is a data structure that follows the principle of advanced out.In the stack, only the last inserted element can be accessed, called the top element.The stack supports two basic operations: PUSH inserts the element to the top of the stack, and the POP removes the top element of the stack.In addition, there are other auxiliary operations, such as PEEK (back to the top element of the stack but not removing) and ISEMPTY (judging whether the stack is empty).
Steps to customize stacks with solitary collection:
1. Import Solong Collections framework.
2. Create a custom stack class.
3. Realize the basic operation of the stack: PUSH, POP, Peek, and ISEMPTY.
Example code:
Below is a sample code that uses Solong Collections to implement custom stack:
import com.solong.collections.Stack;
public class MyStack<T> implements Stack<T> {
private T[] stackArray;
private int top;
private int size;
@SuppressWarnings("unchecked")
public MyStack(int capacity) {
stackArray = (T[]) new Object[capacity];
top = -1;
size = 0;
}
@Override
public void push(T element) {
stackArray[++top] = element;
size++;
}
@Override
public T pop() {
if (isEmpty()) {
throw new IllegalStateException("Stack is empty.");
}
T element = stackArray[top--];
size--;
return element;
}
@Override
public T peek() {
if (isEmpty()) {
throw new IllegalStateException("Stack is empty.");
}
return stackArray[top];
}
@Override
public boolean isEmpty() {
return size == 0;
}
}
Use custom stack:
When using a custom stack, you first need to create a stack object.Then, you can use the PUSH method to insert the element into the stack, use the POP method to remove the top element of the stack, use the PEEK method to obtain the top element of the stack, but not remove it. Use the ISEMPTY method to determine whether the stack is empty.
public class Main {
public static void main(String[] args) {
MyStack<Integer> stack = new MyStack<>(5);
stack.push(10);
stack.push(20);
stack.push(30);
System.out.println("Current stack: " + stack.peek()); // 输出：Current stack: 30
stack.pop();
System.out.println("Current stack: " + stack.peek()); // 输出：Current stack: 20
}
}
Summarize:
Through the Solong Collections framework, we can easily implement the custom stack data structure and use the basic operations to perform stack operations.Custom stacks are suitable for scenes that need to process data in accordance with the principle of LIFO, such as calculating expressions and revoking operations.Developers can flexibly use the custom stack function of the Solong Collections framework according to their needs and business scenarios.
