public class TestClass {
    static class TestClassInt {
        int value;

        public TestClassInt(int i) {
            value = i;
        }

        public void printMe() {
            System.out.println(String.valueOf(value));
        }
    }

    TestClassInt var1;
    Runnable     r1;
    Runnable     r2;

    public TestClass() {
        var1 = new TestClassInt(1);

        r1 = () -> var1.printMe();
        r2 = var1::printMe;

        var1 = new TestClassInt(2);
    }

    private void print() {
        r1.run();
        r2.run();
    }

    public static void main(String[] args) {
        new TestClass().print();
    }

}