下列程序的输出结果是（ ）。class Demo {void test( ){ Systeme.out.pnnt( NO )；}void test(int i){ System.out.print(a)；}void test(int a，int b){ System.out.print(a+b)；} }class Test {public static void main(String args[ ] ) {Demo de=new Demo( )；de.test( )；de.test(5)；de.test(6，8)；}}
A． File stream
B． Pipe stream
C． Randam stream
D． Filter stream