Java indexOf method for multiple matches in String

Question

I had a question about the indexOf method. I want to find multiple cases of \"X\" in a string.

Suppose my string is \"x is x is x is x\", I want to find x in all of

Answer 1

There is a second variant of the indexOf method, which takes a start-index as a parameter.

i = str.indexOf('x');
while(i >= 0) {
     System.out.println(i);
     i = str.indexOf('x', i+1);
}