String manipulation breadcrumb

convert String breadcrumb to index

public static void main(String[] args) {
	List<String> list = new ArrayList<>();
	list.add("Kennisbank &#187; Overig &#187; Waterkwaliteit (relevante emissies) &#187; Synthese");
	list.add("Kennisbank &#187; Overig &#187; Waterkwaliteit (relevante emissies) &#187; Synthese &#187; Onderzoeksvraag 1: welke waterkwaliteitsproblemen worden ervaren?");
	list.add("Kennisbank &#187; Overig &#187; Waterkwaliteit (relevante emissies) &#187; Synthese &#187; Onderzoeksvraag 2: wat is de relatieve bijdrage aan deze waterkwaliteitsproblemen");
	list.add("Kennisbank &#187; Overig &#187; Waterkwaliteit (relevante emissies) &#187; Synthese &#187; Onderzoeksvraag 3: in hoeverre is de relatieve bijdrage te beinvloeden door maatregelen in het afvalwatersysteem?");
	list.add("Kennisbank &#187; Overig &#187; Waterkwaliteit (relevante emissies) &#187; Synthese &#187; Effect toegepaste methodiek op bepalen waterkwaliteitseffecten");
	list.add("Kennisbank &#187; Overig &#187; Waterkwaliteit (relevante emissies) &#187; Wegwijs in niet-chemische bestrijding");
	list.add("Kennisbank &#187; Overig &#187; Waterkwaliteit (relevante emissies) &#187; test print");
	list.add("Kennisbank &#187; Overig &#187; Waterkwaliteit (relevante emissies) &#187; test print &#187; test print2");
	list.add("Kennisbank &#187; Overig &#187; Waterkwaliteit (relevante emissies) &#187; test print &#187; test print2 &#187; test print print 2222");
	list.add("Kennisbank &#187; Overig &#187; Waterkwaliteit (relevante emissies) &#187; test print &#187; test print 33");
	list.add("Kennisbank &#187; Overig &#187; Waterkwaliteit (relevante emissies) &#187; test print &#187; test print 34 &#187; test print 334");
	list.add("Kennisbank &#187; Overig &#187; Waterkwaliteit (relevante emissies) &#187; test print &#187; test print 35 &#187; test print 334 &#187; test print 334");
	list.add("Kennisbank &#187; Overig &#187; Waterkwaliteit (relevante emissies) &#187; test123");

	String prevValue = "";
	for(int i=0;i<list.size();i++){
		int currentLength = list.get(i).split(" &#187; ").length;	
		int previousLength = 0;
		if(i==0){
			prevValue = "0";
			previousLength = currentLength;
		} else {
			previousLength = list.get(i-1).split(" &#187; ").length;

		}
		System.out.println(previousLength+"??"+currentLength+" >>> "+ getIndex(previousLength, currentLength, prevValue));
		prevValue = getIndex(previousLength, currentLength, prevValue);

	}
}


private static String getIndex(int prevLength, int currLength, String prevValue){
	String result = "";
	if(currLength==prevLength){
		int lastCharPrevValue = Integer.valueOf(prevValue.substring(prevValue.length()-1)) + 1;
		String newValue = prevValue.substring(0, prevValue.length()-1) + String.valueOf(lastCharPrevValue);
		result = newValue ;
	} else if (currLength - prevLength == 1) {
		result = prevValue+"."+1;

	} else if(prevLength - currLength >= 1){
		int sumReplaceChar = (prevLength - currLength)*2+1;
		int lastCharPrevValue = Character.getNumericValue(prevValue.charAt(prevValue.length()-sumReplaceChar)) +1;
		String newValue = prevValue.substring(0, prevValue.length()-sumReplaceChar) + String.valueOf(lastCharPrevValue);
		result = newValue;
	}

	return result;
}