Throw keyword in Java

Question

In Java, is the keyword (throw) only used for throwing exception that you've created. If not, can someone give an example of how it is used outside of your own made exceptions.

Answer 1

You can throw anything that extends Throwable

void greet(String name) {
    if (name == null) {
        throw new IllegalArgumentException("Cannot greet null");
    }
    System.out.println("Hello, " + name);
}