1944this.items = items;

1957if (items != null) 1959Object item = items[a]; 1960items[a] = items[b]; 1961items[b] = item; 1973if (items != null) 1975Object item = items[i]; 1976items[i] = items[j]; 1977items[j] = item; 2070if (items != null) 2072Object item = items[i]; 2073items[i] = items[j]; 2074items[j] = item; 2206Object dt = (items != null) ? items[lo + i - 1] : null; 2218if(items != null) 2219items[lo + i - 1] = items[lo + child - 1]; 2223if (items != null) 2224items[lo + i - 1] = dt; 2235ti = (items != null) ? items[i + 1] : null; 2239if(items != null) 2240items[j + 1] = items[j]; 2244if(items != null) 2245items[j + 1] = ti;