java - Jackson Deserialization: unrecognized field -

from tutorial had impression should work (simplified example):

public class foo {     private string bar;     public string getbar() {         return bar;     }     public void setbar(string bar) {         this.bar = bar;     }     public static class qux {         private string foobar;         public string getfoobar() {             return foobar;         }         public void setfoobar(string foobar) {             this.foobar = foobar;         }     } } ...  string in = "{ \"bar\": \"123\", \"qux\" : {\"foobar\": \"234\"}}"; objectmapper mapper = new objectmapper(); foo obj = mapper.readvalue(in, foo.class); 

however, error

unrecognizedpropertyexception: unrecognized field "qux" (class foo), not marked ignorable 

i'm running 2.2.2

it work if pull qux class out of foo

public class foo {     private string bar;      // added     private qux qux;      public string getbar() {         return bar;     }     public void setbar(string bar) {         this.bar = bar;     }      // added getter , setter     public qux getqux() {         return qux;     }     public void setqux(qux qux) {         this.qux = bar;     } }  public static class qux {     private string foobar;     public string getfoobar() {         return foobar;     }     public void setfoobar(string foobar) {         this.foobar = foobar;     } }