java - The method getOrDefault(String, String) is undefined for the type Map<String,String> -


in following code error @ return of namespacemap. don't know why. getordefault methode should defined in hashmap.class. tried create namespacemapper described in linked example https://www.intertech.com/blog/jaxb-tutorial-customized-namespace-prefixes-example-using-namespaceprefixmapper/

 import java.util.hashmap;  import java.util.map;   import com.sun.xml.bind.marshaller.namespaceprefixmapper;   public class fimsnamespaceprefixmapper extends namespaceprefixmapper {   private map<string, string> namespacemap = new hashmap<>();   public fimsnamespaceprefixmapper() {     namespacemap.put("http://base.fims.tv", "bms");     namespacemap.put("http://transformmedia.fims.tv", "tms");  }   @override  public string getpreferredprefix(string arg0, string arg1, boolean arg2) {     return namespacemap.getordefault(arg0, arg1);  }}

the getordefault method introduced in java 8. check runtime version of java using running java -version. if using lower java 8 (1.8), upgrade , code should work.


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