Important methods and fields of the String class

1. Length (): Gets the string length the space is also the length of his

Get the implementation of the length of a string:zichuan.length ()

1. CharAt (): Gets the character at the specified position

Implementation method:Zichuan.charat ()

1. GetChars (): Gets the substring from the specified position copied into the character array (it has four parameters, as described in the example)

Implementation method:Zichuan.getchars ( a number, a number , a character, a number )

1. Replace (): substring substitution
2. toUpperCase (), toLowerCase (): Uppercase and lowercase conversions
3. Trim (): Remove the Kinsoku space:
4. ToCharArray (): Converts a String object to a character array

Important methods and fields of the String class