indexOf() question

[limys]

Hello everyone, i'm juz started learning java programming and i'm having a problem with my code for my project.

i cannot understand y my indexOf() returns me 2 result..

here is a example:

String ys = "</book><book></book>";

if(ys.indexOf("<book>", 0) != -1){
System.out.println("Valid");
} else {
System.out.println("Invalid");
}

the result i get is:

Valid
Valid



How come it print out twice?

[BandC]

First, it'd be better if you posted this in the programming forum. I tested your code and it prints Valid only once. Maybe you have this code in a loop or something so it gets executed twice.

[limys]

okies.. i got it.. thks