Java - 找到异常的第一个原因

public class ExceptionExample {
    public static void main(String[] args) {
        try {
            int[] arr = {1, 2, 3};
            int num = arr[3]; // 这里会抛出 ArrayIndexOutOfBoundsException
        } catch (ArrayIndexOutOfBoundsException e) {
            System.out.println("捕获到异常：" + e.getMessage());
            e.printStackTrace();
        }
    }
}

捕获到异常：Index 3 out of bounds for length 3
java.lang.ArrayIndexOutOfBoundsException: Index 3 out of bounds for length 3
	at ExceptionExample.main(ExceptionExample.java:6)