小编pyt*_*Foo的帖子

我有这个代码:

>>> for i in xrange(20):
...     print 'a',
... 
a a a a a a a a a a a a a a a a a a a a

我想输出'a',' '不像这样:

aaaaaaaaaaaaaaaaaaaa

可能吗？

我有这个代码:

url = new URL("http://anurl");
urlConn = url.openConnection();
dis = new DataInputStream(urlConn.getInputStream()); 
num = dis.readLine();
System.out.println(num); //prints "NO"
if(num != "NO") {
   //this code is executed
}

我做错了什么？