what is Keys.ZENKAKU_HANKAKU in webdriver?

Question

As i came across this code,

 driver.findElement(By.name("xxx")).sendKeys(
                Keys.ZENKAKU_HANKAKU);

so wanted to know why and when to use this kind of key.

Answer 1

This is a Japanese modifier key which will change between Hankaku (half-width) and Zenkaku (full-width) characters. To try and visualise this:

Hankaku - 12345

Zenkaku - 1 2 3 4 5

As to which key it is bound to on the keyboard, F9 and F10 are common bindings. F10 will change from Zenkaku to Hankaku, and F9 from Hankaku to Zenkaku.

Source - Wikipedia