jodd-core/src/main/java/jodd/util/StringUtil.java
public static boolean isSubstringAt(final String string, final String substring, final int offset) {
		int len = substring.length();

		int max = offset + len;

		if (max > string.length()) {
			return false;
		}

		int ndx = 0;
		for (int i = offset; i < max; i++, ndx++) {
			if (string.charAt(i) != substring.charAt(ndx)) {
				return false;
			}
		}

		return true;
	}
public static boolean isSubstringAt(final String string, final String substring, final int offset) {
		int len = substring.length();

		int max = offset + len;

		if (max > string.length()) {
			return false;
		}

		int ndx = 0;
		for (int i = offset; i < max; i++, ndx++) {
			if (string.charAt(i) != substring.charAt(ndx)) {
				return false;
			}
		}

		return true;
	}
public static boolean isSubstringAt ( final String string , final String substring , final int offset ) { int len = substring . length ( ) ; int max = offset + len ; if ( max > string . length ( ) ) { return false ; } int ndx = 0 ; for ( int i = offset ; i < max ; i ++ , ndx ++ ) { if ( string . charAt ( i ) != substring . charAt ( ndx ) ) { return false ; } } return true ; }
Returns <code>true</code> if substring exist at given offset in a string.
Returns <code > true< / code > if substring exist at given offset in a string .