How to check string with array of strings in java?

Question

HI I want to check one string value with an array of strings. I am using the contains() method, but it is case sensitive. For example:

String str="one";
String [] items= {"ONE","TWO","THREE"};

str.contains(items); // it is returning false.

Now the question is how to check that string ?

can anyone help me?

thanks in advance

Answer 1

You probably want to know if items contain str? And be case-insensitive. So loop through the array:

boolean contains = false;
for (String item : items) {
    if (str.equalsIgnoreCase(item)) {
        contains = true;
        break; // No need to look further.
    } 
}

Answer 2

you could sort the string first using stringArray=Arrays.sort(stringArray); you can then use the Binary Search algorithm int pos = Arrays.binarySearch(stringArray, stringItem);. if (pos > -1) then you found the element else the stringItem doesnot exist in the stringArray.

Answer 3

If you will only check once:

    String str="one"; String [] items= {"ONE","TWO","THREE"};

    for(String s : items){
        if(s.compareToIgnoreCase(str) == 0){
            System.out.println("match");
        }
    }

If you will do many checks:

    String str="one"; String [] items= {"ONE","TWO","THREE"};

    List<String> lowerItems = new ArrayList<String>();
    for(String s : items)
        lowerItems.add(s.toLowerCase());

    if(lowerItems.contains(str))
        System.out.println("match");