Java total review content

StringBuffer needs when defining the right way

E.g:

StringBuffer xxx = new StringBuffer ( "Wenwen pig");

Receiving a return value to use when using the method for adding and connecting StringBuffer;

 

 

String method:

s.equalslgnorecase () // not case sensitive

s.tolowercase () // converted to lowercase

s.touppercase () // converted to uppercase

s.equals () // Compare 

s.length () // determine the length

s.concat () // connector

s.Indexof () // find and extract subscript

s.LastIndexof () // Find from the back

replace = s.replace(" "," ")   //        替换

s.substring (,) // extract ........... ............ intermediate portion and

s.split () // Split, fill in parentheses characters (spaces can)

s.trim () // removal space portion of the head and tail of the string

StringBuffer sb = new StringBuffer()        

sb.tostring (); // converted to a String

sb.append ( "**") // append characters

sb.insert (1, "**") // insert a character