clone()失败__testSon_clone_public_java_aSon_

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clone()失败

来源: 互联网发布时间：2015-05-12

本文导语: testSon.java public class testSon extends testFather implements Cloneable { public int intSon = 2; } test.java public class test { public static void main(String[] args) { testSon aSon = new testSon(); ...

testSon.java

public class testSon extends testFather implements Cloneable
{
    public int intSon = 2;
}

test.java

public class test
{
    public static void main(String[] args)
    {
         testSon aSon = new testSon();
         testSon bSon = aSon.clone();
    }
}

编译test.java

D:JavaTesttest.java:6: clone() has protected access in java.lang.Object
testSon bSon = aSon.clone();
                                   ^
D:JavaTesttest.java:6: incompatible types
found   : java.lang.Object
required: testSon
testSon bSon = aSon.clone();
                                         ^
2 errors

是咋回事儿？？？

clone()是protected函数,不能这样调用

class testSon implements Cloneable
{
    public int intSon = 2;

    public Object clone() throws CloneNotSupportedException
    {
     return super.clone();
    }
}

public class test
{
    public static void main(String[] args)
    {
         try
         {
         testSon aSon = new testSon();
         testSon bSon = (testSon)aSon.clone();
         System.out.println(bSon.intSon);
        }
        catch(Exception e)
        {
        }
    }
}

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