Java StringBuffer and StringBuilder class

When the string to be modified when the need to use StringBuffer and StringBuilder classes.

And the String class is different, StringBuffer and StringBuilder classes of objects can be modified many times, and does not create new unused objects.

StringBuilder class is made in Java 5, the biggest difference between it and the StringBuffer StringBuilder is not thread-safe method (can not synchronize access).

Because compared to StringBuffer StringBuilder has the speed advantage, so in most cases recommend using the StringBuilder class. However, in applications that require thread safe, you must use the StringBuffer class.

Examples

public class Test{

    public static void main(String args[]){
       StringBuffer sBuffer = new StringBuffer(" test");
       sBuffer.append(" String Buffer");
       System.out.println(sBuffer);  
   }
}

The above examples compiled results are as follows:

test String Buffer

StringBuffer Methods

Here are the main method of StringBuffer class supports:

The following list of methods and method of the String class like this: