JComboBox是一种原始类型。泛型类型JComboBox的引用< E>应该参数化 [英] JComboBox is a raw type. References to generic type JComboBox<E> should be parameterized

问题描述

  String [] boxOptions = {1，2，4，8，16，20，40，100， 400}; 
 JComboBox box = new JComboBox（boxOptions）; 
  

之前我的程序中有这些确切的代码行，并且没有收到此错误。我做了一些搜索，我发现的结果有点过头了。任何想法？

错误是：

  JComboBox是生类型。泛型类型JComboBox的引用< E>应该参数化
  

解决方案

您可以使用：

  JComboBox< String> box = new JComboBox<>（boxOptions）; 
  

发生这种情况是因为 JComboBox 现在是通用的class。

String[] boxOptions = {"1","2","4","8","16","20","40","100","400"};
JComboBox box = new JComboBox(boxOptions);

I had these exact lines of code in my program before, and wasn't getting this error. I did a bit of searching and the results I found are going a bit over my head. Any ideas?

The error is:

JComboBox is a raw type. References to generic type JComboBox<E> should be parameterized

解决方案

You can use:

JComboBox<String> box = new JComboBox<>(boxOptions);

This happens because JComboBox is now a generic class.

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