There is a string
https://site.com/order/external/main.action? I add one more line to it.
shop=123456&transaction=123456&successUrl=http://site.ru/pay/success&failUrl=http://site.ru/pay/error&user=380999999999 As a result, I get
https://site.com/order/external/main.action?shop=123456&transaction=123456&…ttp://site.ru/pay/error&failUrl=http://site.ru/pay/error&user=380999999999 Concatenated no matter how
str1.concat(str2); or
str1+str2; I thought it cuts along the length, made a new variable 2 times longer - print it out entirely.
What is the problem?