How to implement the Python program in java language

Question

Python has the in operator which makes it simple. but how do i implement the below python concept in java since java doesnt have the in operator. This is a Python program

secret_word = "python"
correct_letters = "oy"
count = 0
while count < len(secret_word):
    print(secret_word[count] if secret_word[count] in correct_letters else '_', end=" ")
    count += 1

`someString.contains(someOtherString);` – Rabbit Guy Mar 18 '16 at 18:53 — Rabbit Guy, Mar 18 '16 at 18:53

score 1 · Answer 1 · answered Mar 18 '16 at 18:54

1

You can mimic this with the ternary operator and String.indexOf:

System.out.println(correct_letters.indexOf(secret_word.charAt(count)) > -1 ? secret_word.charAt(count) : '_')

That said, you should follow @Peter's advice and use a regular expression replace:

System.out.println(secret_word.replaceAll("[^" + Pattern.quote(correct_letters) + "]","_"));

answered Mar 18 '16 at 18:54

Darth Android

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19

`contains()` is clearer. – bcsb1001 Mar 18 '16 at 18:58
@bcsb1001 Only a bit, and using indexOf with characters is much more efficient because it avoids a whole bunch of string manipulation. – Darth Android Mar 18 '16 at 19:00

score 0 · Answer 2 · answered Mar 18 '16 at 18:54

You wouldn't do it like this at all. I would use a regex.

String secret_word = "python";
String correct_letters = "oy";
System.out.println(secret_word.replaceAll("[^"+correct_letters+"]", "_"));

This would mask all the letters except the correct one. I suspect you can use regex in python as well.

How to implement the Python program in java language

2 Answers2