創建項目後報錯：Build path specifies execution environment javase-1.7.there are no JREs installed in the wor

創建項目後報錯： Build path specifies execution environment javase-1.7.there are no JREs installed in the workspace that are strictly compatible with this environment. 解決方法： 右鍵當前項目，選擇 properties，在新窗口中選擇 java

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