1.首先对java项目project点击右键
2.然后找到Build Path,点击Configure Build Path
3.在java Build Path下方的Libraries里依次点击Modulepath——>Add Library——>JRE System Library——>Execution environment
4.此时可在右框选择并点击如JavaSE-15(jdk-15.02),再点击Finish——>Apply and Close。此时就已完成啦

1.首先对java项目project点击右键
2.然后找到Build Path,点击Configure Build Path
3.在java Build Path下方的Libraries里依次点击Modulepath——>Add Library——>JRE System Library——>Execution environment
4.此时可在右框选择并点击如JavaSE-15(jdk-15.02),再点击Finish——>Apply and Close。此时就已完成啦