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package it.cast.stack;

import javax.management.RuntimeErrorException;

public class shareStack {

/** * @param args */private int top1;private int top2;private Object[] element;private int stackSize;public shareStack(int size){    element = new Object[size];    top1 = -1;    top2 = size;    stackSize = size;}public boolean push(int i, E e){    if(top2 == top1+1){        throw new RuntimeException("栈满"); //相当于抛出了    }    if(i==1){        top1++;        element[top1] = e;        return true;    }    if(i==2)    {        top2--;        element[top2] = e;        return true;    }    else{        throw new RuntimeException("输入错误");    }}public E pop(int i){    if(i ==1){        if(top1==-1){            throw new RuntimeException("栈1为空");        }        E e = (E)element[top1];        element[top1] = null;        top1--;        return e;    }    else if(i==2){        if(top2==stackSize){            throw new RuntimeException("2kong");        }        E e = (E)element[top1];        element[top2] = null;        top2++;        return e;    }    else{        throw new RuntimeException("输入错误");    }}public static void main(String[] args) {    // TODO Auto-generated method stub}

}