Java程序默认引用的包是______。

A．for(int i=0; i＜100; i++)
System. Out. println(i);
B．int i=0;
do
System. out. println(i);
i++;
while(i＜100);
C．int i=0;
while(i＜100)
System. Out. println(i);
i++;D．int i=0;
while(i＜100)
i++;
if(i＜100) continue;
System. out. println(i);

A．windowClosing()
B．windowClosed()
C．windowMinimized()
D．windowOpened()