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Java中操作字符串都有哪些类？它们之间有什么区别？ #233

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zhonghuasheng opened this issue Apr 1, 2020 · 0 comments
Open

Java中操作字符串都有哪些类？它们之间有什么区别？ #233

zhonghuasheng opened this issue Apr 1, 2020 · 0 comments
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@zhonghuasheng
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主要有三种：String, StringBuffer, StringBuilder
String是不可变的对象，每次对String类型的改变都可能会生成一个新的对象
StringBuffer和StringBuilder是可以改变的对象。
对于操作效率：StringBuilder > StringBuffer > String
对于线程安全：StringBuffer是线程安全的，可用于多线程（关键方法基本都使用synchronized关键字修饰）；StringBuilder是非线程安全的，用于单线程
不频繁的字符串操作使用String
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