Runtime ConcurrentModificationException in java

Question

private static void deleteContact() {
    System.out.println("Please enter the name:");
    String name = scanner.next();
    if (name.equals("")) {
        System.out.println("!Please enter the name");
        deleteContact();
    } else {
        boolean doesExist = false;

        // line 182
        for (Contact c: contacts) {
            if (c.getName().equals(name)) {
                doesExist = true;
                contacts.remove(c);
            }
        }

        if (!doesExist) {
            System.out.println("There is no such contact");
        }
    }

    showInitialOptions();
}

Exception in thread "main" java.util.ConcurrentModificationException
    at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:909)
    at java.util.ArrayList$Itr.next(ArrayList.java:859)
    at org.neutral_networks.javaChallange.Main.deleteContact(Main.java:182)

line 182 in my code mean, this for loop:

        for (Contact c: contacts) {
            if (c.getName().equals(name)) {
                doesExist = true;
                contacts.remove(c);
            }
        }

Please help me out to solve this exception.

i just build this deleteContact() method for remove contact from the contact list.

i am getting the input from the user and this is actually name of the contact which one users would like to remove from the contact list.

so, generally when i call the function and and give input it will causes the exit my program and say,, Exception in thread "main" java.util.ConcurrentModificationException