java - Java - 覆盖从外部类继承泛型的内部类时出现“名称冲突”和“构造函数未定义”错误

Question

我最近在一个项目中升级了eclipse和java版本，出现了一些错误。我尝试重现并发现以下设置导致使用 Java 1.8 的 Eclipse Oxigen.3a (4.7.3a) 中的错误，而同样适用于 eclipse 3.7.2 和 Java 1.7

TestSomeObject.java：

package a;
public class TestSomeObject
{
}

TestGeneric.java：

package a;
public class TestGeneric<T>
{
  T element;

  protected class InnerGeneric
  {
     T innerElement;

     public InnerGeneric() { }
  }
}

测试A.java：

package a;

public class TestA extends TestGeneric<TestSomeObject>
{
  public TestA(String a, String b) {}

  public InnerA someMethod(String some, InnerGeneric inner)
  {
     return new InnerA(some, inner);
  }

  protected class InnerA
  {
     public InnerA(String a, InnerGeneric b) {  }
  }
}

TestB.java

package a;
import a.TestA;

public class TestB extends TestA
{
  public TestB(String a, String b){
     super(a,b);
  }

  public InnerA someMethod(String some, InnerGeneric inner)
  {
     return new InnerB(some, inner);
  }

  protected class InnerB extends InnerA
  {
     public InnerB(String a, InnerGeneric b)
     {
        super(a, b);
     }
  }
}

在测试 B 类中，我收到以下编译错误：

1. 一些方法：Description Resource Path Location Type Name clash: The method someMethod(String, TestGeneric<TestSomeObject>.InnerGeneric) of type TestB has the same erasure as someMethod(String, TestGeneric<TestSomeObject>.InnerGeneric) of type TestA but does not override it TestB.java line 13 Java Problem
2. 调用 super(a,b) 时：Description Resource Path Location Type The constructor TestA.InnerA(String, TestGeneric<TestSomeObject>.InnerGeneric) is undefined TestB.java line 22在此处输入代码Java Problem

在 eclipse 版本：3.7.2 和 Java 1.7 中，这是可行的。

这是为什么？我该怎么做才能清除错误？

Answer 1

答案是，在方法签名中更精确地定义 InnerGeneric 类：

测试B.java：

package a;

public class TestB extends TestA
{
  public TestB(String a, String b){
     super(a,b);
  }

  public InnerA someMethod(String some, TestGeneric<TestSomeObject>.InnerGeneric inner)
  {
     return new InnerB(some, inner);
  }

  protected class InnerB extends InnerA
  {
     public InnerB(String a, TestGeneric<TestSomeObject>.InnerGeneric b)
     {
        super(a, b);
     }
  }
}