You have to turn off the graphics hot keys that flip the screen. If you're on Windows, you need to right click on the Windows desktop and select "Graphics Properties..." (or something similar depending on your version of Windows). This will bring up a screen where you can manage graphics and display options, look for a place where you can disable hot keys, sometimes it's hidden under something like "Options and Support". Turn off the CTRL + ALT + ↑ and CTRL + ALT + ↓ hotkeys (alternatively you can just disable all graphics hot keys if you're not using them).

Ctrl +alt+下/上/左/右作为热键优先于eclipse设置。作为替代，我尝试了不同的方法。

Step 1: Triple click the line you want to copy & press `Ctrl`-`C`(This will
select & copy that entire line along with the `new line`).
Step 2: Put your cursor at the starting of the line where you want to to paste
your copied line & press `Ctrl`-`V`.(This will paste that entire line & will
push previous existing line to the new line, which we wanted in the first place).

我已经为Eclipse编写了linecopypaste插件，它模仿了Visual Studio的复制/剪切/粘贴行为。我还发现了copycutcurrentline，它似乎做了同样的事情。

这是另一种方法:

1) Alt+Up and Alt+Down (or Alt+Down and Alt+Up, order does not matter)
2) Ctrl+C

当然vim的“yy”是最快的:)

(在Windows上测试)[根据以下评论，也适用于Ubuntu, IBM RTC 4 / RSA 9]

在Eclipse中，按Ctrl+Shift+L 2 (或按Ctrl + 3 > type: Keys > Enter)。 在“键入筛选文本”(搜索)文本框中，键入“复制行” 选择筛选行，右键单击“Binding”字段，然后选择全部 按Ctrl + Shift + V 给好

从现在开始，对于任何你想复制的行，只需按Ctrl+Shift+V。

在Mac上，我尝试了linecopypaste，效果很好 cmd+c ->复制当前(未选中)行，就像Vi/Vim中的“yy”命令一样 cmd+v ->粘贴，就像Vi/Vim中的“p”命令一样

感谢Larsch的工作!

PD:在优胜美地使用Eclipse Luna 4.4.2