??????????
package testclone;
public class DeepClone implements Cloneable {
public String name;
public String[] name2;
public DeepClone() {
name2 = new String[2];
}
public Object clone() {
DeepClone deepClone = null;
try {
deepClone = (DeepClone) super.clone();
if (name != null) {
deepClone.name = new String(name);
}
if (name2 != null) {
deepClone.name2 = new String[name2.length];
for (int i = 0; i < name2.length; i++) {
deepClone.name2[i] = this.name2[i];
}
}
} catch (CloneNotSupportedException e) {
e.printStackTrace();
}
return deepClone;
}
}
package testclone;
public class TestDeepClone {
public void changeDeepClone(DeepClone a) {
a.name = "b";
}
public void changInt(int i) {
i = i * 2 + 100;
}
public static void main(String[] args) {
TestDeepClone test = new TestDeepClone();
DeepClone a = new DeepClone();
a.name = "a";
System.out.println("before change : a.name=" + a.name);
test.changeDeepClone(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);
DeepClone a1 = new DeepClone();
DeepClone a2 = (DeepClone) 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=a1
a2.name2=[Ljava.lang.String;@14318bb
a2.name2=b1