jodd-core/src/main/java/jodd/util/StringUtil.java
public static String compressChars(final String s, final char c) {
		int len = s.length();
		StringBuilder sb = new StringBuilder(len);
		boolean wasChar = false;
		for (int i = 0; i < len; i++) {
			char c1 = s.charAt(i);
			if (c1 == c) {
				if (wasChar) {
					continue;
				}
				wasChar = true;
			} else {
				wasChar = false;
			}
			sb.append(c1);
		}
		if (sb.length() == len) {
			return s;
		}
		return sb.toString();
	}
public static String compressChars(final String s, final char c) {
		int len = s.length();
		StringBuilder sb = new StringBuilder(len);
		boolean wasChar = false;
		for (int i = 0; i < len; i++) {
			char c1 = s.charAt(i);
			if (c1 == c) {
				if (wasChar) {
					continue;
				}
				wasChar = true;
			} else {
				wasChar = false;
			}
			sb.append(c1);
		}
		if (sb.length() == len) {
			return s;
		}
		return sb.toString();
	}
public static String compressChars ( final String s , final char c ) { int len = s . length ( ) ; StringBuilder sb = new StringBuilder ( len ) ; boolean wasChar = false ; for ( int i = 0 ; i < len ; i ++ ) { char c1 = s . charAt ( i ) ; if ( c1 == c ) { if ( wasChar ) { continue ; } wasChar = true ; } else { wasChar = false ; } sb . append ( c1 ) ; } if ( sb . length ( ) == len ) { return s ; } return sb . toString ( ) ; }
Compress multiple occurrences of given char into one appearance.
Compress multiple occurrences of given char into one appearance .