为什么他写的数组是String[]arr_data={"慕课网1，"慕课网2"，"慕课网3"，"慕课网4"}? []符号不是至少要与左边或右边有一个空格吗？
//java中数组的声明
String str[]={"1","1","1","1"};
String[] str={"1","1","1","1"};
//可是这里却是这样的
String[]arr_data={"慕课网1，"慕课网2"，"慕课网3"，"慕课网4"}；
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//java中数组的声明
String str[]={"1","1","1","1"};
String[] str={"1","1","1","1"};
//可是这里却是这样的
String[]arr_data={"慕课网1，"慕课网2"，"慕课网3"，"慕课网4"}；
2018-05-20
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