编译报错：
have the same erasure, yet neither overrides the other
首先，这个问题貌似出现在JDK1.7 中，1.6时应该可以的。
public class PortfolioDataValidator implements IRecordValidator{
public int validate(List<BusinessObjectViolation> violations, Object obj, int index, Object validateHelper) {
if (obj == null) {
return 0;
} else {
return doValidate(violations, obj, index, validateHelper);
}
}
}
提示在这个类的这个方法上出错。
public interface IRecordValidator<T> {
int validate(List<BusinessObjectViolation> violations, T obj, int index, Object validateHelper);
}
这是接口。
一个简单的实现，应该没什么问题的。
Sun那边有个ticket
http://bugs.java.com/bugdatabase/view_bug.do?bug_id=7078419
The interim support for "jsr14" class files was never a documented supported option. And, since generic signature attributes are not defined for v48 (JDK 1.4) and earlier class files, it is inappropriate for javac to behave otherwise.
最后这么解决的：
public class PortfolioDataValidator implements IRecordValidator<Object> {
public int validate(List<BusinessObjectViolation> violations, Object obj, int index, Object validateHelper) {
if (obj == null) {
return 0;
} else {
return doValidate(violations, obj, index, validateHelper);
}
}
}
添加了一个
IRecordValidator<Object>
编译“have the same erasure, yet neither overrides“
原文：http://my.oschina.net/u/921876/blog/348076