class Ins implements java.lang.Cloneable { 

    public Ins() {

        System.out.println("Construct called");

    }  

    @Override

    public Ins clone() throws CloneNotSupportedException {

        return (Ins) super.clone();

    }

}

public class ConstructTest {

 @Test

    public void test() throws InstantiationException, IllegalAccessException, CloneNotSupportedException {

        System.out.println("\n---new Ins() begin---");

        Ins ins1 = new Ins(); 

        System.out.println("---new Ins() end---");

        System.out.println("\n---Ins.class.newInstance() begin---");

        Ins ins2 = Ins.class.newInstance(); 

        System.out.println("---Ins.class.newInstance() end---");

        System.out.println("\n---ins1.clone() begin---");

        Ins ins3 = ins1.clone(); 

        System.out.println("---ins1.clone() end---");

    }

}

输出：

---new Ins() begin---

Construct called

---new Ins() end---

---Ins.class.newInstance() begin---

Construct called

---Ins.class.newInstance() end---

---ins1.clone() begin---

---ins1.clone() end---