Created
March 18, 2018 08:36
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| 1. 接收使用者輸入的數，直到使用者輸入 -1 為止，並將使用者過去輸入的數，全部一起於一列印出，並用空白分開。 | |
| - Scanner, nextInt | |
| - ArrayList - 使用者輸入的數字存在這 | |
| - 透過 for 印出 | |
| 2. 電腦產生 7 個 1 - 42 的亂數，並不得重覆。 | |
| - Random | |
| - HashSet |
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https://gist.github.com/JasonSupper/b5b17a1c01c8c79f9e64c4ff10847790
need some help,thanks!