Interpretazione eccezione, non capisco

[wino_7]

Salve a tutti non riesco a capire perchè la terza chiamata genera un excep di tipo exception2.

class Exception1 extends Exception {}
class Exception2 extends Exception {}

public class Test {

    static int method(String x) throws Exception1, Exception2 {

        try {
            if (x.equals("aabbcc")) {
                return 0;
            }

            if (x.length() < 9) {
                return method("a" + x + "c");
            }

            throw new Exception2();
        }

        catch(Exception1 e) {
            throw new Exception2();
        }

        catch(Exception2 e) {
            throw new Exception1();
        }
    }

    public static void main(String[] args) throws Exception1, Exception2 {
        System.out.println(Test.method("a"));
        System.out.println(Test.method("bb"));
        System.out.println(Test.method("ccc"));
    }

}