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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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¡¡¡¡$ ./jdk-6u17-linux-i586.bin
¡¡¡¡$ vi /etc/profile
¡¡¡¡#Ìí¼ÓÈçÏÂ
¡¡¡¡export JAVA_HOME=/usr/jdk1.6.0_17
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import java.io.FilenameFilter;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.sql.Timestamp;
import java.util.Arrays;
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