public class Something {
    private Block block1 = new Block(1);
    private Block block2 = new Block(2);
    private Block block3 = new Block(3);

    public Block getBlock1() {
        return block1;
    }

    public Block getBlock2() {
        return block2;
    }

    public Block getBlock3() {
        return block3;
    }

    public static void main(String ...args) {
        try {
            Class cls = Class.forName("Something");
            for (Method m: cls.getDeclaredMethods()) {
                if (m.getName().startsWith("getBlock")) {
                    Block block = (Block) m.invoke(cls.newInstance());
                    System.out.println(block.getTags().getSize());
                }
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
        } catch (InvocationTargetException e) {
            e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
        } catch (InstantiationException e) {
            e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
        } catch (IllegalAccessException e) {
            e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
        }


    }
}