This gist supports a question i answered on Stack overflow: http://stackoverflow.com/questions/17573955/confused-about-cloning-in-java

CloneTest.java

public class CloneTest implements Cloneable {
    public static void main(String[] args) {
        CloneTest original = new CloneTest("dummyname", new StringBuffer("Molly"), 1);
        CloneTest clone = (CloneTest)original.clone();
        System.out.println("orignal.name2:" + original.name2.toString());
        System.out.println("clone.name2:" + clone.name2.toString());
        clone.setName2("Dolly");
        System.out.println("orignal.name2 (after clone update):" + original.name2.toString());
        System.out.println("clone.name2: (after clone update):" + clone.name2.toString());
    }

    String name;
    StringBuffer name2;
    int marks;
    public CloneTest(String s, StringBuffer s2, int i) {
        name = s;
        name2 = s2;
        marks = i;
    }

    public void setName(String s) {
        name = s;
    }

    public void setName2(String s) {
        int length = this.name2.length();
        this.name2.delete(0, length);
        this.name2.append(s);
    }

    public void setMarks(int i) {
        marks = i;
    }

    @Override
    public Object clone() {
        return new CloneTest(this.name, this.name2, this.marks);
    }
}

CloneTest.out

orignal.name2:name2
clone.name2:name2
orignal.name2 (after clone update):Dolly
clone.name2: (after clone update):Dolly
[Finished in 0.1s]