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If the data format is showing as above , and we want to sort these data by time.

We can use the method as below :

First , we should input these data into a String Array , 

then , 

Arrays.sort(buyList, new Comparator()
{ 

public int compare(Object o1, Object o2)
{ 

try
{ 

String o1Str = (String)o1;
String o2Str = (String)o2;
String[] o1StrSplit = o1Str.split(" ");
String[] o2StrSplit = o2Str.split(" ");
SimpleDateFormat df = new SimpleDateFormat( "yyyy-MM-dd",Locale.ENGLISH);
Date d1 = df.parse(o1StrSplit[o1StrSplit.length-1]);
Date d2 = df.parse(o2StrSplit[o2StrSplit.length-1]);
return d1.compareTo(d2); 

}
catch(Exception e)
{

e.printStackTrace();

}
return -1; 

} 

});