答案 StringBuffer是同步的,StringBuilder不是。 StringBuilder比StringBuffer更快,因为它没有synchronized。 这是一个简单的基准测试: publicclassMain{publicstaticvoidmain(String[] args){intN =77777777;longt; { StringBuffer sb =newStringBuffer(); t = System.currentTimeMillis();for(inti = N; i -->0...
StringBuilder class was introduced in JDK 1.5. StringBuilder API is very much similar to StringBuffer API. In fact, StringBuilder class was actually introduced as a replacement for the StringBuffer class (for single-thread applications). StringBuilder class belongs to the java.lang package and is i...
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由于StringBuilder 相较于 StringBuffer 有速度优势,所以多数情况下建议使用 StringBuilder 类。然而在应用程序要求线程安全的情况下,则必须使用 StringBuffer 类。 public class one { public static void main(String[] args) { StringBuffer sBuffer = new StringBuffer("这里面可添加值:"); ...
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StringBuffer(String string) –This makes a StringBuffer with an argument that specifies the initial string along with 16 memory locations are provided for making changes to the strings. Conclusion It has been observed that the classes String, StringBuffer and StringBuilder have certain benefits that...
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This is anotherdifference between string literal and new stringbecause in case of new, interning doesn't happen automatically until you call theintern()method on that object. Also, don't forget to useStringBufferandStringBuilderfor string concatenation, they will reduce the number ...
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As we have seen,StringBufferandStringBuilderare both useful classes to create mutable sequences of characters in Java. Here are some general recommendations on choosing between them: If you are in a single-threaded environment or can guarantee that the instance will not be accessed by multiple thr...