示例
public
class
ClassA {
Object o;
String s;
public void
methodA() {
s = (String) o;
// ...
}
}
解决方案
确保对象 o 是字符串
示例
public
class
ClassA {
String s;
Object o;
public void
methodA() {
if
(o
instanceof
String){
s = (String) o;
// ...
}
}