java_lang_ClassCastException怎么修改？

问题分析：
在进行强制类型转换时，转换的对象不是转换的类型的实例而抛出此类异常。
解决方案：
在进行强制类型转换时，转换的对象不是转换的类型的实例而抛出此类异常。可以通过if(object instanceof 类型)的语句来判断object的类型是否可强制类型转换来进行。
代码示例

1. [backcolor=transparent]   [backcolor=transparent]public[backcolor=transparent] [backcolor=transparent]Son[backcolor=transparent] getSon[backcolor=transparent]([backcolor=transparent]Father[backcolor=transparent] reference[backcolor=transparent]){
2. [backcolor=transparent]      [backcolor=transparent]if[backcolor=transparent]([backcolor=transparent]reference [backcolor=transparent]instanceof[backcolor=transparent] [backcolor=transparent]Son[backcolor=transparent]){
3. [backcolor=transparent]        [backcolor=transparent]Son[backcolor=transparent] son[backcolor=transparent]=([backcolor=transparent]Son[backcolor=transparent])[backcolor=transparent]reference[backcolor=transparent];
4. [backcolor=transparent]        [backcolor=transparent]return[backcolor=transparent] son[backcolor=transparent];
5. [backcolor=transparent]      [backcolor=transparent]}
6. [backcolor=transparent]      [backcolor=transparent]return[backcolor=transparent] [backcolor=transparent]null[backcolor=transparent];
7. [backcolor=transparent]    [backcolor=transparent]}

1. https://docs.oracle.com/javase/7/docs/api/java/lang/ClassCastException.html