This video shows you an example of String Builder in Java. It then proceeds to use String Builder methods such as insert(), delete(), append(), replace(), deleteCharAt() and some string methods in the process. The second part of this video shows how to convert Strings to primitive types and primitive types to Strings using String.valueOf(), Integer.parseInt(),Byte.parseByte(), Float.parseFloat(), Short.parseShort(), Long.parseLong() and Boolean.parseBoolean().