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public class Stack<T>{
 
   private ArrayList<T>  list;
   public Stack(){
          list =  new ArrayList<T>();
}
          public T pop(){
              if(list.size != 0 ){
                 T popOut = list.get(list.size - 1);
                 remove(popOut);
                 return popOut;
             }
             else{
               return null;
            }
 }
}
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 Java·ÃÎÊȨÏÞÒ»¹²ÓÐËÄÖÖ£¬ËûÃÇÖ®¼äµÄ·ÃÎÊȨÏޱȽÏͨ¹ýÒÔÏÂÒ»×éÀý×ÓÀ´½âÊÍ
Àý×Ócode£ºModiferDemo.java
package com.glust.blog.j2se;
public class ModiferDemo{
  //ËÄÖÖ·ÃÎÊȨÏ޵ıäÁ¿£¨ÊôÐÔ£©
  private int a;
  int b;//friendly
  protected int c;
  public int d;
  ......

java ÕýÔò±í´ïʽ

  String str  = "[010101]+[010102]";
  String ss = "
  System.out.println(ss); //  \[010101]  
  [  ÊÇÌØÊâ×Ö·û£¬
  ÐèÒªÓ÷´Ð±¸Ü  \[  ¶ÔÆä½øÐÐתÒå
\\[010101]";  
  String ssss = "
\\ ......
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