工业染厂柠檬酸的作用:cannot find symbol; symbol : class MetadataObject,

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import oracle.express.mdm.*;
import oracle.olapi.metadata.MetadataObject;
import oracle.olapi.data.source.Source;
import oracle.express.olapi.data.full.ExpressDataProvider;

//import oracle.olapi.metadata.*;
//import oracle.olapi.data.source.*;
//import oracle.express.olapi.data.full.*;
public class SampleMetadataDiscoverer{
static final int TERSE=0;
static final int VERBOSE=1;
public SampleMetadataDiscoverer( ) {
}
public void main(String[] args){
ExpressDataProvider dp=Myconnection.connectionOnLab1();
MdmMetadataProvider mp=null;
mp=dp.getDefaultMetadataProvider();
MdmSchema root=null;
try{
root=mp.getRootSchema();
System.out.println("root mdmschema :" + root.getName());
}catch (Exception e){
System.out.println("Exception encountered:" + e.toString());
}
}

}
"SampleMetadataDiscoverer.java": cannot find symbol; symbol : class MetadataObject, location: package oracle.olapi.metadata at line 8, column 30
"SampleMetadataDiscoverer.java": cannot find symbol; symbol : class Source, location: package oracle.olapi.data.source at line 9, column 33
"SampleMetadataDiscoverer.java": cannot find symbol; symbol : class ExpressDataProvider, location: package oracle.express.olapi.data.full at line 10, column 39
cannot find symbol; symbol : class MetadataObject, jsp中,请教 cannot find symbol：的错误 cannot resolve symbol JAVA编译问题cannot resolve symbol Cannot find Wave Volume control cannot resolve symbol——javabean编译问题 cannot resolve symbol method parseInt(java.lang.String) cannot find pagemaker'sresource directory是什么意思， 电脑说cannot find hard drive Windows XP ICS Status: cannot find working ICS.