Question

Is there a similar function to indexof() that will search a string array (preferably unsorted) for a string and return it’s index? (or maybe ordinate value?)

for example i am trying:

String[] colours= {"Red", "Orange", "Yellow"};

System.out.println("indexOf(Red) = " +
        colours.indexOf("Red"));

…but having no success.

thanks.

AV

p.s. this will eventually need to work in a 2d array (in case that matters)

Answer 1

String[] colours= {"Red", "Orange", "Yellow", "Green", "Blue", "Violet", "Orange", "Blue"};

Arrays.asList(colours).indexOf("Red"); // 0

OR
if order doesn’t matter then

Arrays.sort(colours);   
Arrays.binarySearch(colours,"Red");//binary search takes sorted[natural order] array as input

• List
• Arrays