The best way to get the index of a number in an array in java?

Question

My program finds the length sub-string in that goes in ascending order that does not have to be contiguous.

So if I were to enter: 5;3;4;8;6;7

The output would be: 4

I would like my program to output the largest sub-sequence as well. And to do this, I would need the index of certain parts of the array: 5;3;4;8;6;7 , as illustrated in a question I previously asked: Looking for a hint (not the answer) on how to return the longest acsending non contiguous substring when I already have the length

So if the input was: 5;3;4;8;6;7

Index:        0  1  2  3  4  5
Value:        5  3  4  8  6  7
------------  ----------------
Length:       1  1  2  3  3  4
Predecessor: -1 -1  1  2  2  4

I would need the index of each time the Length value, is one smaller than the previous value.So I would need the index of: 6,,8,4,3 and 5 However I am not sure how to get the indexes of these values in Java. Is there a method that would allow me to do this easily?

Answer 1

虽然不是数组，但我将使用List和indexOf（Object）