下列选项中属于字符串常量的是______。

A．java. text包
B．java. awt包
C．java. lang包
D．java. util包

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);