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translation: Add Python and Java code for EN version (#1345)
* Add the intial translation of code of all the languages * test * revert * Remove * Add Python and Java code for EN version
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/**
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* File: array_stack.java
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* Created Time: 2022-11-25
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* Author: krahets (krahets@163.com)
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*/
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package chapter_stack_and_queue;
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import java.util.*;
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/* Stack class based on array */
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class ArrayStack {
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private ArrayList<Integer> stack;
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public ArrayStack() {
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// Initialize the list (dynamic array)
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stack = new ArrayList<>();
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}
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/* Get the length of the stack */
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public int size() {
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return stack.size();
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}
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/* Determine if the stack is empty */
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public boolean isEmpty() {
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return size() == 0;
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}
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/* Push */
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public void push(int num) {
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stack.add(num);
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}
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/* Pop */
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public int pop() {
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if (isEmpty())
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throw new IndexOutOfBoundsException();
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return stack.remove(size() - 1);
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}
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/* Access stack top element */
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public int peek() {
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if (isEmpty())
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throw new IndexOutOfBoundsException();
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return stack.get(size() - 1);
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}
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/* Convert the List to Array and return */
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public Object[] toArray() {
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return stack.toArray();
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}
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}
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public class array_stack {
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public static void main(String[] args) {
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/* Initialize stack */
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ArrayStack stack = new ArrayStack();
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/* Element push */
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stack.push(1);
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stack.push(3);
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stack.push(2);
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stack.push(5);
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stack.push(4);
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System.out.println("Stack stack = " + Arrays.toString(stack.toArray()));
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/* Access stack top element */
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int peek = stack.peek();
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System.out.println("Top element peek = " + peek);
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/* Element pop */
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int pop = stack.pop();
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System.out.println("Popped element = " + pop + ", after popping" + Arrays.toString(stack.toArray()));
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/* Get the length of the stack */
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int size = stack.size();
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System.out.println("Length of the stack size = " + size);
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/* Determine if it's empty */
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boolean isEmpty = stack.isEmpty();
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System.out.println("Is the stack empty = " + isEmpty);
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}
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}
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