??????????
package testclone;
public class ShallowClone implements Cloneable {
public String name;
public String[] name2;
public ShallowClone() {
name2 = new String[2];
}
public Object clone() {
ShallowClone o = null;
try {
o = (ShallowClone) super.clone();
} catch (CloneNotSupportedException e) {
e.printStackTrace();
}
return o;
}
}
package testclone;
public class TestShallowClone {
public void changeA(ShallowClone a) {
a.name = "b";
}
public void changInt(int i) {
i = i * 2 + 100;
}
public static void main(String[] args) {
TestShallowClone test = new TestShallowClone();
ShallowClone a = new ShallowClone();
a.name = "a";
System.out.println("before change : a.name=" + a.name);
test.changeA(a);
System.out.println("after  change : a.name=" + a.name);
int i = 1;
System.out.println("before change : i=" + i);
test.changInt(i);
System.out.println("after  change : i=" + i);
ShallowClone a1 = new ShallowClone();
ShallowClone a2 = (ShallowClone) a1.clone();
a1.name2[0] = "a";
a1.name2[1] = "1";
a2.name2[0] = "b";
a2.name2[1] = "1";
System.out.println("a1.name2=" + a1.name2);
System.out.println("a1.name2=" + a1.name2[0] + a1.name2[1]);
System.out.println("a2.name2=" + a2.name2);
System.out.println("a2.name2=" + a2.name2[0] + a2.name2[1]);
}
}
?????????
before change : a.name=a
after  change : a.name=b
before change : i=1
after  change : i=1
a1.name2=[Ljava.lang.String;@61de33
a1.name2=b1
a2.name2=[Ljava.lang.String;@61de33
a2.name2=b1