和String类不同的是，StringBuffer和StringBuilder类的对象能够被多次的修改，并且不产生新的未使用对象。 StringBuilder类在Java 5中被提出，它和StringBuffer之间的最大不同在于StringBuilder的方法不是线程安全的（不能同步访问）。

I think that most experienced Java developers are aware of many of the many characteristics of the Java String that make it a little different than other objects. One particular nuance of the Java ...