IntelliJ拒绝添加自定义组件 [英] IntelliJ refusing to add custom component

问题描述

我的问题如下：假设我们有以下文件：

my problem is as follows: Assume that we have the following file:

package p;
import javax.swing.*;
public class test extends JPanel {
  test(){
    super(true);
  }
}

我保存文件并进行编译。现在，在IntelliJ中，我打开一个表单并尝试向其添加 test 。它不会起作用！我点击'非调色板组件'，点击我的表格，然后在打开的对话框中输入 p.test 作为我的班级名称（IntelliJ甚至在这里提供名称完成） ）并检查'自动创建绑定'。点击确定后，没有任何反应。但是 - 如果我把'javax.swing.JButton'作为类名，它就可以了。这太荒谬了。我不明白我做错了什么？测试是否必须实现或覆盖某个功能？我必须修改路径吗？或者我应该将我的PC从我的窗口中拉出来？

I save the file and compile it. Now, in IntelliJ, I open a form and try to add test to it. It won't work! I click 'Non-Palette Component', click on my form and in the dialog that open up, I type p.test as my class name (IntelliJ even offers name completion here) and check 'create binding automatically'. After I click ok, nothing happens. But - if I take 'javax.swing.JButton' for the class name, it works. It's ridiculous. I don't see what I am doing wrong? Does test have to implement or override a certain function? Do I have to modify a path? Or should I just kick my PC out of my window?

推荐答案

java.lang.UnsupportedClassVersionError：测试：不支持的major.minor版本51.0

java.lang.UnsupportedClassVersionError: Test : Unsupported major.minor version 51.0

问题是您将项目语言级别设置为1.7并使用JDK 1.7构建它。 IntelliJ IDEA在您的系统上运行在JDK 1.6下，无法加载使用1.7语言级别编译的自定义组件类。

The problem is that you have the project language level set to 1.7 and using JDK 1.7 to build it. IntelliJ IDEA is running under JDK 1.6 on your system and cannot load the custom component class that was compiled with the 1.7 language level.

此问题的可能解决方案：

Possible solutions to this problem:

• 在IDEA 12中将项目/模块JDK更改为1.6


• 可以为每个模块配置字节码版本，在其他命令行参数中将其设置为1.6


• 字段指定以下选项： -source 1.6 -target 1.6


• 在JDK 1.7下运行IDEA （适用于Windows和Linux，不建议在Mac上使用）

• change project/module JDK to 1.6
• in IDEA 12 it's possible to configure bytecode version per module, set it to 1.6
• in Additional command line parameters field specify the following options: -source 1.6 -target 1.6
• run IDEA under JDK 1.7 (applies to Windows and Linux, not recommended on Mac)

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