Code

class Class1 {
    Class4 field1;
    
    
    Class1() {}

    void method1() {
        try {
            method2(new Class1());
        } catch(Class2 exception) {
            exception.method1();
            Class4 local = method7(exception);
            if(local != null) {
                local.method1();
            }
            field1 = new Class4();
            if(exception instanceof Class3) {
                ((Class3) exception).method3(field1);
                
            }
            throw exception;
        }
    }
    
    static void method2(Class1 arg) {
        arg.method3();
    }

    void method3()  {
        method4(null);
    }

    void method4(Class3 arg) {
        method5(arg);
    }

    Class3 method5(Class3 arg) {
        Class3 local = method6();
        Class3.method2(this);
        throw local;
    }

    Class3 method6() {
        Class3 local = new Class3();
        local.field4.method1();
        return local;
    }


    Class4 method7(Class2 arg) {
        return null;
    }
}


class Class2 extends java.lang.RuntimeException {
    boolean field2;
    Class2 field3;

    Class2() {}

    Class4 method1() {
        field2 = true;
        return null;
    }
  
}

class Class3 extends Class2 {
    Class4 field4;
    static Class4 field5;
    
    Class3() {
        field4 = new Class4();
    }

    /**
     * overrides method7 in parent class
     */
    Class4 method1() {
        return null;
    }

    static void method2(Class1 arg) {
        field5 = null;
    }

    final void method3(Class4 arg) {
        field5 = arg;
    }
}


class Class4 {
    char[] field5;

    Class4() {}

    void method1() {}
}