CODEWITHSUNDEEP
java
Gearsdf Gearsdfas
Gearsdf Gearsdfas

Reputation: 99

Using String.endswith() method on Java

I have an array I want to check the the last digits if it is in the array.

Example:

String[] types = {".png",".jpg",".gif"}

String image = "beauty.jpg";
// Note that this is wrong. The parameter required is a string not an array.
Boolean true = image.endswith(types);

Please note: I know I can check each individual item using a for loop.

I want to know if there is a more efficient way of doing this. Reason being is that image string is already on a loop on a constant change.

Upvotes: 5

Views: 5789

Answers (3)

kjp
kjp

Reputation: 3116

Use Arrays.asList to convert to a List. Then you can check for membership.

String[] types = {".png",".jpg",".gif"};
String image = "beauty.jpg";
if (image.contains(".")) 
    System.out.println(Arrays.asList(types).contains(
        image.substring(image.lastIndexOf('.'), image.length())));

Upvotes: 0

Nathan Hughes
Nathan Hughes

Reputation: 96385

Arrays.asList(types).contains(image.substring(image.lastIndexOf('.') + 1))

Upvotes: 14

David B
David B

Reputation: 2698

You can substring the last 4 characters:

String ext = image.substring(image.length - 4, image.length);

and then use a HashMap or some other search implementation to see if it is in your list of approved file extensions.

if(fileExtensionMap.containsKey(ext)) {

Upvotes: 5

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