U ovom primjeru naučit ćemo implementirati strukturu podataka steka u Javi.
Da biste razumjeli ovaj primjer, trebali biste imati znanje o sljedećim temama programiranja Java:
- Klasa Java stacka
- Java generički
Primjer 1: Java program za implementaciju Stacka
// Stack implementation in Java class Stack ( // store elements of stack private int arr(); // represent top of stack private int top; // total capacity of the stack private int capacity; // Creating a stack Stack(int size) ( // initialize the array // initialize the stack variables arr = new int(size); capacity = size; top = -1; ) // push elements to the top of stack public void push(int x) ( if (isFull()) ( System.out.println("Stack OverFlow"); // terminates the program System.exit(1); ) // insert element on top of stack System.out.println("Inserting " + x); arr(++top) = x; ) // pop elements from top of stack public int pop() ( // if stack is empty // no element to pop if (isEmpty()) ( System.out.println("STACK EMPTY"); // terminates the program System.exit(1); ) // pop element from top of stack return arr(top--); ) // return size of the stack public int getSize() ( return top + 1; ) // check if the stack is empty public Boolean isEmpty() ( return top == -1; ) // check if the stack is full public Boolean isFull() ( return top == capacity - 1; ) // display elements of stack public void printStack() ( for (int i = 0; i <= top; i++) ( System.out.print(arr(i) + ", "); ) ) public static void main(String() args) ( Stack stack = new Stack(5); stack.push(1); stack.push(2); stack.push(3); System.out.print("Stack: "); stack.printStack(); // remove element from stack stack.pop(); System.out.println("After popping out"); stack.printStack(); ) )
Izlaz
Umetanje 1 Umetanje 2 Umetanje 3 Slaganje: 1, 2, 3, nakon iskakanja 1, 2,
U gornjem primjeru implementirali smo strukturu podataka steka u Javi.
Da biste saznali više, posjetite strukturu podataka steka.
Primjer 2: Implementirajte stog pomoću klase Stack
Java nudi izgrađenu Stack
klasu koja se može koristiti za implementaciju stoga.
import java.util.Stack; class Main ( public static void main(String() args) ( // create an object of Stack class Stack animals= new Stack(); // push elements to top of stack animals.push("Dog"); animals.push("Horse"); animals.push("Cat"); System.out.println("Stack: " + animals); // pop element from top of stack animals.pop(); System.out.println("Stack after pop: " + animals); ) )
Izlaz
Stog: (pas, konj, mačka) stog nakon pop-a: (pas, konj)
U gornjem primjeru koristili smo Stack
klasu za implementaciju stoga u Javi. Ovdje,
- životinje.push () - umetnite elemente na vrh stoga
- animals.pop () - uklonite element s vrha stoga
Primijetite, koristili smo kutne zagrade tijekom stvaranja stoga. Predstavlja da je stog generičkog tipa.