1、找到oracle安装目录下的jdk,如：E:\app\Administrator\product\11.2.0\dbhome_1\jdk
2、找到oracle安装目录下的developer路径：E:\app\Administrator\product\11.2.0\dbhome_1\sqldeveloper\sqldeveloper\bin\sqldeveloper.conf
SetJavaHome E:\app\Administrator\product\11.2.0\dbhome_1\jdk
参考：https://zhidao.baidu.com/question/468239727.html