如何使用两个栈实现队列Java

import java.util.Stack;

public class Solution {
  Stack<Integer> stack1 = new Stack<Integer>();
  Stack<Integer> stack2 = new Stack<Integer>();
  public void push(int node) {
    //直接入stack1栈
    stack1.push(node);
  }
  public int pop() {
    //若stack2为空
    if(stack2.isEmpty()){
     while(!stack1.isEmpty()){
       stack2.push(stack1.pop());
     }
    }
     return stack2.pop();
  }
}