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(base) MAC:Tue Apr 20:09:37:~> jshell
|  Welcome to JShell -- Version 15.0.1
|  For an introduction type: /help intro

jshell> Double d = 1.5;
d ==> 1.5

jshell> d.toString()
$2 ==> "1.5"

jshell> Double.toString(d)
$3 ==> "1.5"

jshell> Double.toString(3.14159)
$4 ==> "3.14159"

jshell> Character.isAlpabetic('a')
|  Error:
|  cannot find symbol
|    symbol:   method isAlpabetic(char)
|  Character.isAlpabetic('a')
|  ^-------------------^

jshell> Character.isAlpabetic((int)'a')
|  Error:
|  cannot find symbol
|    symbol:   method isAlpabetic(int)
|  Character.isAlpabetic((int)'a')
|  ^-------------------^

jshell> Character.isAlphabetic('a')
$5 ==> true

jshell> Character.isAlphabetic('5')
$6 ==> false

jshell> Character.isDigit('5')
$7 ==> true

jshell> Character.isDigit('a')
$8 ==> false

jshell> Character.isISOControlCharacter('\n
|  Error:
|  unclosed character literal
|  Character.isISOControlCharacter('\n
|                                  ^

jshell> Character.isISOControlCharacter('\n')
|  Error:
|  cannot find symbol
|    symbol:   method isISOControlCharacter(char)
|  Character.isISOControlCharacter('\n')
|  ^-----------------------------^

jshell> Character.isISOControl('\n')
$9 ==> true

jshell> Character.isISOControl('\t')
$10 ==> true

jshell> Character.isISOControl('\a')
|  Error:
|  illegal escape character
|  Character.isISOControl('\a')
|                           ^
|  Error:
|  unclosed character literal
|  Character.isISOControl('\a')
|                         ^

jshell> Character.isISOControl('\a')
|  Error:
|  illegal escape character
|  Character.isISOControl('\a')
|                           ^
|  Error:
|  unclosed character literal
|  Character.isISOControl('\a')
|                         ^

jshell> Character.isISOControl('p')
$11 ==> false

jshell> Character.isWhitespace(' ')
$12 ==> true

jshell> Character.isWhitespace('\n')
$13 ==> true

jshell> Character.isWhitespace('\t')
$14 ==> true

jshell> Character.isWhitespace('q')
$15 ==> false

jshell> Character.toLowerCase('a')
$16 ==> 'a'

jshell> Character.toLowerCase('A')
$17 ==> 'a'

jshell> Character.toLowerCase('6')
$18 ==> '6'

jshell> Character.toString('a')
$19 ==> "a"

jshell> Characte.toString('\n')
|  Error:
|  cannot find symbol
|    symbol:   variable Characte
|  Characte.toString('\n')
|  ^------^

jshell> Character.toString('\n')
$20 ==> "\n"

jshell> Character.toTitleCase('a')
$21 ==> 'A'

jshell> Character.compare('a', 'z')
$22 ==> -25

jshell>