import java.util.Arrays;
import java.util.Comparator;

public class DatumsVergleich {

	public static void main(String[] args) {
		String[] daten = { "16.05.1703", "08.12.1925", "08.06.1925",
				"12.02.1031" };
		System.out.println("Vorher:");
		for (String s : daten) {
			System.out.println(s);
		}
		System.out.println("\nNachher:");
		Arrays.sort(daten, new DateComparator(false));
		for (String s : daten) {
			System.out.println(s);
		}
		
		DateComparator dc = new DateComparator();
		System.out.println("Vergleich von " + daten[0] + " und " + daten[1]
				+ ": " + dc.compare(daten[0], daten[1]));
		System.out.println("Vergleich von " + daten[1] + " und " + daten[2]
				+ ": " + dc.compare(daten[1], daten[2]));
		System.out.println("Vergleich von " + daten[2] + " und " + daten[3]
				+ ": " + dc.compare(daten[2], daten[3]));
		System.out.println("Vergleich von " + daten[3] + " und " + daten[0]
				+ ": " + dc.compare(daten[3], daten[0]));
	}
}

class DateComparator implements Comparator<String> {
	
	boolean sortType = true;

	public DateComparator(){
		this(true);
	}

	public DateComparator(boolean sortType){
		this.sortType = sortType;
	}

	public int compare(String arg0, String arg1) {
		String[] date0 = arg0.split("\\.");
		String[] date1 = arg1.split("\\.");
		if (date0.length != date1.length)
			throw new ClassCastException();
		String compStr0 = date0[2] + date0[1] + date0[0];
		String compStr1 = date1[2] + date1[1] + date1[0];
		if(!sortType)
			return compStr0.compareTo(compStr1) * -1;
		return compStr0.compareTo(compStr1);
	}
}