stringbuilder in java

1StringBuilder stringBuilder = new StringBuilder();
2
3stringBuilder.append("string");
4
5System.out.println("String = " + stringBuilder.toString());

1Java StringBuilder class is used to create
2  mutable (modifiable) string. The Java
3  StringBuilder class is same as StringBuffer
4  class except that it is non-synchronized.
5    
6StringBuilder()
7    creates an empty string Builder with the initial capacity of 16.
8StringBuilder(String str)
9    creates a string Builder with the specified string.
10StringBuilder(int length)
11    creates an empty string Builder with the specified capacity as length.  
12
13StringBuilder builder = new StringBuilder("Harvard"); 
14// mutable you modify object new keyword ile olusturuoyrsun StringBuilder
15        builder.append(" School"); 
16// append method we are calling from Builder 
17//** it is not synchronized means fast
18        System.out.println(builder); // Harvard School

1StringBuilder objects are like String objects, except that they can be modified

1Java StringBuilder class is used to create
2  mutable (modifiable) string. The Java
3  StringBuilder class is same as StringBuffer
4  class except that it is non-synchronized.
5    
6StringBuilder()
7    creates an empty string Builder with the initial capacity of 16.
8StringBuilder(String str)
9    creates a string Builder with the specified string.
10StringBuilder(int length)
11    creates an empty string Builder with the specified capacity as length.    

1It is mutable char sequence and it is not
2thread safe.

1public StringBuilder reverse()