String is immutable whereas StringBuffer and StringBuilder can change their values.
The only difference between StringBuffer and StringBuilder is that StringBuilder is unsynchronized whereas StringBuffer is synchronized.
The only difference between StringBuffer and StringBuilder is that StringBuilder is unsynchronized whereas StringBuffer is synchronized.
字符串类型对比
本文探讨了String、StringBuffer与StringBuilder的区别。String是不可变的,而后两者可以修改内容。StringBuffer同步,适合多线程环境;StringBuilder非同步,性能更优。

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