以下實例示範了使用者如何透過建立用於插入元素的自訂函數push() 方法和用於彈出元素的pop() 方法來實作堆疊:
/* author by w3cschool.cc MyStack.java */public class MyStack { private int maxSize; private long[] stackArray; private int top; public MyStack(int s) { maxSize = s; stackArray = new long[maxSize]; top = -1; } public void push(long j) { stackArray[++top] = j; } public long pop() { return stackArray[top--]; } public long peek() { return stackArray[top]; } public boolean isEmpty() { return (top == -1); } public boolean isFull() { return (top == maxSize - 1); } public static void main(String[] args) { MyStack theStack = new MyStack(10); theStack.push(10); theStack.push(20); theStack.push(30); theStack.push(40); theStack.push(50); while (!theStack.isEmpty()) { long value = theStack.pop(); System.out.print(value); System.out.print(" "); } System.out.println(""); }}
以上程式碼運行輸出結果為:
50 40 30 20 10
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