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  1. package Stack.Array;
  2.  
  3. public class Stack{
  4.     private Object[] stack;
  5.     private int size = 10;
  6.     private int stack_pointer = -1;
  7.  
  8.     public Stack(){
  9.         stack = new Object[size];
  10.     }
  11.  
  12.     public void push(Object o) {
  13.         if (stack_pointer >= size - 1) throw new StackOverflowException();
  14.         stack_pointer++;
  15.         stack[stack_pointer] = o;
  16.     }
  17.  
  18.     public Object pop() {
  19.         if (stack_pointer < 0) throw new StackUnderflowException();
  20.         Object o = stack[stack_pointer];
  21.         stack_pointer--;
  22.         return o;
  23.     }
  24.  
  25.     public int size() {
  26.         return stack_pointer + 1;
  27.     }
  28.  
  29.     public static class StackException extends RuntimeException {}
  30.     public static class StackOverflowException extends StackException {}
  31.     public static class StackUnderflowException extends StackException {}
  32. }
  33.  
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https://ideone.com/2uQfYd
language:
Java (12.0.1)
created:
11 years ago
visibility:
public

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