I have a html page and it sends a form with method POST type, I get the data like this:
String email = request.getParameter("user");
When I compare the email string with another string containing the same text it makes me false. Why does this happen? how can I solve it?
I'm doing the normal comparison
if(email == "[email protected]"){
out.println("executou aqui");
}
In the case "[email protected]" would be the same value as the String I got in the post method.
When you use ==, you test whether two objects are identical, look at the example:
String texto1 = "Mundo genial";
String texto2 = "Mundo genial";
In the above case if you compare with == you will get the desired value, but since you are bringing this information, it is the same as doing this:
String s1 = new String("Mundo genial");
String s2 = new String("Mundo genial");
In this case you are comparing content and the comparison has to be done with equals,
boolean comparar = s1.equals(s2); // resultado = true
boolean comparar = s1 == s2; // resultado = false
If you want to continue with == you would have to somehow point to the same object, something like this:
String s1 = new String("Mundo genial");
String s2 = s1;
In the above case if you make the comparison s1 == s2, the value would be true because they are pointing to the same object.