Java Clone(类的复制)
http://blog.csdn.net/ilibaba/article/details/3773545
自己实现了一遍:
public class A implements Cloneable {
public String str[];
A() {
str = new String[2];
}
public Object clone() {
A o = null;
try {
o = (A) super.clone();
} catch (CloneNotSupportedException e) {
e.printStackTrace();
}
o.str = new String[2];
return o;
}
}
void run() throws Exception {
A a1 = new A(), a2 = new A();
a1.str[0] = "a"; a1.str[1] = "b";
a2 = (A) a1.clone();
a2.str[0] = "c"; a2.str[1] = "d";
System.out.println(a1.str[0] + " " + a2.str[0]);
}
结果:
a c
1.
- public class A implements Cloneable {
- public String name;
- public Object clone() {
- A o = null;
- try {
- o = (A) super.clone();
- } catch (CloneNotSupportedException e) {
- e.printStackTrace();
- }
- return o;
- }
- }
2.
- public class A implements Cloneable {
- public String name[];
- public A(){
- name=new String[2];
- }
- public Object clone() {
- A o = null;
- try {
- o = (A) super.clone();
- } catch (CloneNotSupportedException e) {
- e.printStackTrace();
- }
- return o;
- }
- }
3.
- public class A implements Cloneable {
- public String name[];
- public Vector<B> claB;
- public A(){
- name=new String[2];
- claB=new Vector<B>();
- }
- public Object clone() {
- A o = null;
- try {
- o = (A) super.clone();
- } catch (CloneNotSupportedException e) {
- e.printStackTrace();
- }
- o.name=new String[2];//深度clone
- o.claB=new Vector<B>();//将clone进行到底
- for(int i=0;i<claB.size();i++){
- B temp=(B)claB.get(i).clone();//当然Class B也要实现相应clone方法
- o.claB.add(temp);
- }
- return o;
- }
- }