Java clone()??????????÷?
???????????? ???????[ 2013/12/6 10:53:25 ] ????????
????????????????Java??????????????????????????????????Java???????????????????????????"???????"???????????????????????"????"?????"????"??????C?????е????????????????????????????????????????????????????????????????????
???????????????????????"???????"?????κ???"??"??????????????????"???????"???磺
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A a1=new A();
A a2=new A();
a1.name="a1";
a2=a1;
a2.name="a2";
System.out.println("a1.name="+a1.name);
System.out.println("a2.name="+a2.name);
|
?????????????????
????a1.name=a2
????a2.name=a2
??????????????a2????a1??????????????????a2??????????????????a1?????clone??????????????????????Ч????Ρ?
?????????????????A??clone????
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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;
}
}
|
????????????Cloneable?????????????clone??????????clone()?????е?????super.clone()???????ζ??????clone????н??????????super.clone()???????????java.lang.Object???clone()??????
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A a1=new A();
A a2=new A();
a1.name="a1";
a2=a1;
a2.name="a2";
System.out.println("a1.name="+a1.name);
System.out.println("a2.name="+a2.name);
|
?????????????????
????a1.name=a1
????a2.name=a2
??????Class A?????????????java???????????????String???????????????????clone???????clone??????????????Class A?????????????????????????????????clone??
|
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;
}
}
|
???????????
|
A a1=new A();
A a2=new A();
a1.name[0]="a";
a1.name[1]="1";
a2=(A)a1.clone();
a2.name[0]="b";
a2.name[1]="1";
System.out.println("a1.name="+a1.name);
System.out.println("a1.name="+a1.name[0]+a1.name[1]);
System.out.println("a2.name="+a2.name);
System.out.println("a2.name="+a2.name[0]+a2.name[1]);
|
????????????
????a1.name=[Ljava.lang.String;@757aef
????a1.name=b1
????a2.name=[Ljava.lang.String;@757aef
????a2.name=b1
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