public class InterfaceConsumer { public InterfaceConsumer() { } public boolean consumeInterface( Interface interf ) { String s = interf.getString(); Integer i = interf.getInteger(); int i2 = interf.getPrimitiveInt(); boolean b = interf.getPrimitiveBool(); assertTrue( interf.getNull() == null ); return true; } public static void assertTrue( boolean cond ) { if ( !cond ) throw new RuntimeException("assert failed.."); } }