public void pushValue(ValueType value){
  if (VERIFY_INTEGRITY && value == null) {
    throw new IllegalArgumentException();
  }
  if (!isValid()) {
    throw new IllegalStateException("accessing top or bottom frame");
  }
  slotList.add(value);
}

public void pushValue ( ValueType value ) { if ( VERIFY_INTEGRITY && value == null ) { throw new IllegalArgumentException ( ) ; } if ( ! isValid ( ) ) { throw new IllegalStateException ( "accessing top or bottom frame" ) ; } slotList . add ( value ) ; }
push a value onto the java operand stack .
