Android if statement - if a string contains any of the strings from an array

Question

Can you give me a hand please.

I need to do a check, to check if the userCode matches any code in my string array or if the oldUser code also matches any code from the array

String[] code = {"1111", "2222", "3333", "4444", "5555"};

String userCode;
String oldUser;

if (userCode.equals(code) || oldUser.equals(code)) {

RUN 

} else { die }

thanks

Arrays.binarySearch(code, userCode) == 0 if you want speed in searching the array. — Rod_Algonquin
– Rod_Algonquin, Commented Aug 25, 2014 at 3:36
@Rod_Algonquin You also must ensure the array is sorted before you can use Arrays.binarySearch — Smith_61
– Smith_61, Commented Aug 25, 2014 at 3:42

113408 · Accepted Answer · 2014-08-25 03:52:57Z

4

To achieve a simple verification you can loop through your array OR Easy way to do it

List< String > code = Arrays.asList( new String[] { "1111", "2222", "3333", "4444", "5555" } );

String userCode;
String oldUser;

if (code.contains(userCode) || code.contains(oldUser)) {

 //doStuff() 

} else { 
    return; 
}

edited Aug 25, 2014 at 3:52

answered Aug 25, 2014 at 3:33

113408

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2 Comments

Smith_61 Over a year ago

I would suggest changing String[] code to List< String > code = Arrays.asList( new String[] { ... } ); To avoid recreating a new List object twice in the if statement.

113408 Over a year ago

Yes that could be a nice optimization

Evgeniy Dorofeev · Accepted Answer · 2014-08-25 03:29:45Z

1

try this

boolean contains = Arrays.asList(arr).contains(str);

answered Aug 25, 2014 at 3:29

Evgeniy Dorofeev

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Comments

Wundwin Born · Accepted Answer · 2014-08-25 03:31:17Z

0

Loop the array and check each entry with your user values

 String[] code = {"1111", "2222", "3333", "4444", "5555"};

 for (int i = 0; i < code.length; i++) {
     if (userCode.equals(code[i]) || oldUser.equals(code[i])) {
          //do
     }
 }

Or using Arrays.asList(),

List<String> codes = Arrays.asList("1111", "2222", "3333", "4444", "5555");

if (codes.contains(userCode) || codes.contains(oldUser)) {
          //do
}

answered Aug 25, 2014 at 3:31

Wundwin Born

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Comments

Renato Probst · Accepted Answer · 2014-08-25 03:44:25Z

-1

Use a foreach with a boolean var

boolean isTheSame;
For(String myArrayCodes; code;) {
  if (userCode.equals(myArrayCodes) || oldUser.equals(myArrayCodes))
    isTheSame = true;
  break;
  }
}

if (isTheSame) { // usercode or oldUser is on array
 doSomething();
}
else {
}

edited Aug 25, 2014 at 3:44

answered Aug 25, 2014 at 3:34

Renato Probst

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