Java compilation error

Applications Programming
1

i am on red hat Linux .

package hiveudf;
import org.apache.hadoop.hive.ql.exec.UDF;
import org.apache.hadoop.io.Text;
public class lowercaseudf extends UDF {
    public Text evaluate(final Text s) {
        if (s == null) { return null;}
        return new Text(s.toString().lowerCase());
        }
        }
}

# javac -classpath /usr/hdp/2.6.5.0-292/hive2/lib/*:/usr/hdp/2.6.5.0-292/hadoop/*:/usr/hdp/2.6.5.0-292/hadoop-mapreduce/* lowercaseudf.java
lowercaseudf.java:7: error: cannot find symbol
        return new Text(s.toString().lowerCase());
                                    ^
  symbol:   method lowerCase()
  location: class String
1 error
2

I think the correct Java method for lowerCase() is:

toLowerCase()

Maybe you can try:

 return new Text(s.toString().toLowerCase());
3

I think the main problem is obtain in this code where this code have put.

 if (s == null) { return null;}
        return new Text(s.toString().lowerCase());
4

i agree,
toLowerCase() and not lowerCase().

Can't find symbol and in this case it's pointing to the method name lowerCase() means that this method does not existe.

6

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Caution is advised :slight_smile: