package com.lightdev.app.shtm; import java.util.Locale; class Remover { final private String searchedText; private String searchedSubstring; private int begin; private int end; private int removedCharacterNumber; private String processedText; public String getProcessedText() { return processedText; } public Remover(String text) { super(); this.processedText = text; this.searchedText = text.toLowerCase(Locale.ENGLISH); begin = end = removedCharacterNumber = 0; } public int getBegin() { return begin; } public int getEnd() { return end; } private String createSearchedSubstring(final String substring) { return "<" + substring.toLowerCase(Locale.ENGLISH); } public boolean findFirst(){ begin = removedCharacterNumber; return findNext(); } public boolean findNext(){ begin = searchedText.indexOf(searchedSubstring, begin); return findEndOfElement(); } public boolean findLast(){ begin = searchedText.lastIndexOf(searchedSubstring); return findEndOfElement(); } private boolean findEndOfElement() { if(begin == -1) { end = -1; return false; } end = searchedText.indexOf('>', begin + searchedSubstring.length()); if(end == -1){ begin = -1; return false; } end++; return true; } public int getWhiteSpaceBefore(){ if(begin <= 0) return begin; for(int i = begin - 1; i > 0; i--){ if(! Character.isWhitespace(searchedText.charAt(i))) return i + 1; } return 0; } public int getWhiteSpaceAfter(){ if(end == -1) return -1; for(int i = end + 1; i < searchedText.length(); i++){ if(! Character.isWhitespace(searchedText.charAt(i))) return i; } return searchedText.length(); } public Remover removeFirstAndBefore(String element){ searchedSubstring = createSearchedSubstring(element); if(findFirst()){ final int lastIndex = getWhiteSpaceAfter() - removedCharacterNumber; processedText = processedText.substring(lastIndex); removedCharacterNumber += lastIndex; } return this; } public Remover removeLastAndAfter(String element){ searchedSubstring = createSearchedSubstring(element); if(findLast()){ final int firstIndex = getWhiteSpaceBefore() - removedCharacterNumber; processedText = processedText.substring(0, firstIndex); } return this; } static public void main(String[] argv){ String text = "\n\t 1 "; final Remover removeFirstAndBefore = new Remover(text).removeFirstAndBefore("body"); String removeLastAndAfter = removeFirstAndBefore.removeLastAndAfter("/body").getProcessedText(); System.out.println ('"' + removeLastAndAfter + '"'); // assert removeLastAndAfter.equals("1"); } }