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import  java.util.*;
public class stack
{
         private List list=new ArrayList();
         private int index=0;
        public void push(Object obj)
       {
                 list.add(index,obj);
                 index++;
       }
        public Object pop()
       {
                 index--;
                 return list.get(index);
       }
}
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JavaÕýÔò±í´ïʽ

package com.sy.grasp;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegularExpression {
 /**
  * @param args
  * @throws IOException
  */
 public static void main(String[] args) throws IOException {
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import java.io.File;
import java.io.FilenameFilter;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.sql.Timestamp;
import java.util.Arrays;
public class SmallToBig {
 private String newFileName;// ÐÂÎļþÃû×Ö
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