String Buffer

StringBuffer is a variable string object, we can use:

String name = "zs";

StringBuffer sb = new StringBuffer (name); // string to StringBuffer object

String newStr = sb.toString (); // StringBuffer objects into String.

 

commonly used ways:

StringBuffer commonly used method is: append ().

比如： sb.append("asf").append("234");

StringBuffer flashback can sort strings, reverse () methods.

 

StringBuilder and StringBuffer difference:

1. Their function is basically the same, the only difference is that StringBuilder is not thread-safe. StringBuffer thread safe.