In Java 9, the supported values are shown as follows:
| Supported values | Remarks |
| 9 | This is the default, should no value be specified |
| 8 | Sets support to 1.8 |
| 7 | Sets support to 1.7 |
| 6 | Sets support to 1.6 and generates a warning (not an error) to indicate JDK 6 is depreciated |
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