Evaluating substring does not work (now with better formatted code)

Hypersim

Hey everyone,

I have recently started using Processing and I love it! I do not have so much programming background, so I would be happy if you could help me from time to time :)

Right now, I have this code, which does not work as expected:

String varText = "012345";
String varSubstring = varText.substring(2, 3);
println(varSubstring); // This prints 2. So far, so good, but
// ... this does never evaluate to TRUE:
if (varSubstring == "2") {
  println("It is 2!");
} else {
  println("Oh no, it did not work!");
}

Does anyone have an idea how I could make this work?

Thank you very much!

Sebastian

GoToLoop

https://forum.Processing.org/two/discussion/15473/readme-how-to-format-code-and-text

Use equals() in order to compare strings: https://Processing.org/reference/String_equals_.html

final String DIGITS = "012345";
println(DIGITS);

String digit = DIGITS.substring(2, 3);

if ("2".equals(digit))  println("It is 2!");
else                    println("Oh no, it did not work!");

exit();

fuzzySi

can't test this for you at present but look here: https://processing.org/reference/String_equals_.html

try

if (varSubstring.equals("2") == true) {

GoToLoop

Alternatively, go w/ switch () / case: / break / default: : *-:)

https://Processing.org/reference/switch.html
https://Processing.org/reference/case.html
https://Processing.org/reference/break.html
https://Processing.org/reference/default.html

final String DIGITS = "012345";
println(DIGITS);

String digit = DIGITS.substring(2, 3);

switch(digit) {
case "2":
  println("It is 2!"); 
  break;

default:
  println("Oh no, it did not work!");
}

exit();

Hypersim

Thanks a lot, guys, for the really helpful answers!