How do I copy an object in Java?

Question

Consider the code below:

DummyBean dum = new DummyBean();
dum.setDummy(\"foo\");
System.out.println(dum.getDummy()); // prints \'foo\'

DummyBean dumtwo = du         


        

Answer 1

Other than explicitly copying, another approach is to make the object immutable (no set or other mutator methods). In this way the question never arises. Immutability becomes more difficult with larger objects, but that other side of that is that it pushes you in the direction of splitting into coherent small objects and composites.