public void METHOD_1 ( TYPE_1 item ) { if ( item == null ) throw new java.lang.NullPointerException ( ) ; TYPE_2 < TYPE_1 > . TYPE_3 temp = new TYPE_3 ( ) ; temp . item = item ; if ( isEmpty ( ) ) { VAR_1 = temp ; } else { VAR_2 = first ; VAR_3 = null ; } first = temp ; ( size ) ++ ; }

public void METHOD_1 ( TYPE_1 item ) { if ( item == null ) throw new java.lang.NullPointerException ( ) ; TYPE_2 < TYPE_1 > . TYPE_3 temp = new TYPE_3 ( ) ; temp . item = item ; if ( isEmpty ( ) ) { VAR_1 = temp ; } else { VAR_2 = first ; VAR_3 = temp ; } first = temp ; ( size ) ++ ; }
