I need decryption this code

public static String caesarCipher$($String text$)\{$

String encryptedText $=$ new String$()$; $//$ encrypted text value

int key $=3$; $//$ fixed Key value

for $($int i $=0$; i $<$ text.length$()$; i$++)\{//$ Loop to check each character in the plaintext

char currentChar $=$ text.charAt$($i$)$;

if $($Character$.$isLetter$($currentChar$))\{//$ Check if the character is a letter

char base $=($char$)(($currentChar $>=\text{'}$a$\text{'})?\text{'}$a$\text{'}$ : $\text{'}$A$\text{'})$;$//$ Encrypt by shifting each letter $3$ times

char encryptedChar $=($char$)(($currentChar $-$ base $+$ key$)\%26+$ base$)$;

encryptedText $+=($encryptedChar$)$;

$\}$ else $\{$

encryptedText $+=($currentChar$)$;$//$ non$-$letter characters unchanged

$\}$

$\}$

return encryptedText;

$\}$