import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.Enumeration;
import java.util.List;
import java.util.Properties;

public class GetDate 
{
    private String date = "2008-07-18";
    
    private Comparator comp = new Comparator()
    {
        public int compare(Object o1, Object o2) 
        {
            String val1 = o1.toString();
            String val2 = o2.toString();
            if (val1 == null && val2 == null ) 
            {
                return 0;
            } else if (val1 == null && val2 != null ) 
            {
                return -1;
            } else if (val1 != null && val2 == null ) 
            {
                return 1;
            } 
            return val1.trim().compareToIgnoreCase(val2.trim() );
        }
        public boolean equals(Object obj) {
            return true;
        } 
    };
    
    public void getRunDate()
    {
        Properties pro = new Properties();
        
        InputStream in = this.getClass().getResourceAsStream("DateConfig.properites");
        
        
        try
        {
            pro.load(in);
            Enumeration en = pro.propertyNames();
            List list = new ArrayList();
            while(en.hasMoreElements())
            {
                list.add(en.nextElement());
            }
            Collections.sort(list, comp);
            
            int index = list.indexOf(this.date);
            
            if(index == -1)
            {
                System.out.print("你输入的日期有误.");
            }
            else if(index == list.size() - 1)
            {
                System.out.print("你输入的日期是最后的一个日期.");
            }
            else
            {
                String key = list.get(index + 1).toString();
                System.out.print(key + "=" + pro.getProperty(key));
            }
            
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }
    
    public static void main(String[] args) 
    {
        GetDate gd = new GetDate();
        
        gd.getRunDate();
    }

}