yes! options 3 and 4 are wrong. You can change the value of a String object. The qn does'nt mean changing the individual characters in the value of the string. If a String object is immutable, then from the question, the option 3 is also correct哪个译一下
You can change the value of a String object. The qn does'nt mean changing the individual characters in the value of the string.
If a String object is immutable, then from the question, the option 3 is also correct哪个译一下
像substring等都是给出一个新的String的