自己實現了一遍：

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]);

}

結果：

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 claB;

public A(){

name=new String[2];

claB=new Vector();

}

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();//將clone進行到底

for(int i=0;i

B temp=(B)claB.get(i).clone();//當然Class B也要實現相應clone方法

o.claB.add(temp);

}

return o;

}

}

總結

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