Eclipse没有找到javax.swing [英] Eclipse doesn't find javax.swing

问题描述

Eclipse找不到 import javax.swing.JOptionPane

Eclipse cant find the import javax.swing.JOptionPane

它位于哪里，如何包含它是否为

Where is it located and how can i include it?

import javax.swing.JOptionPane;

推荐答案

1. 必须在Eclipse中安装（并选择）JDK：

1. There must be an installed (and selected) JDK in Eclipse:

Window > Preferences > Java > Installed JREs   

项目必须配置为使用该JDK：

The project must be configured to use that JDK:

Project > Properties > Java Build Path > Libraries

列表中应该有一个类似JRE System Library [JDK7]的条目。如果不按：

there should be an entry like "JRE System Library [JDK7]" in the list. If not press:

Add Library... > JRE System Library

项目应该被创建为Java Project：

The project should have been created as a "Java Project":

Project > Properties > Builders

应包含Java Builder

should include "Java Builder"

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