java error

frameworks/opt/telephony/src/java/com/android/internal/telephony/Qualcomm42RIL.java:27: error: cannot find symbol
public class Qualcomm42RIL extends RIL implements CommandsInterface {
                                   ^
  symbol: class RIL
frameworks/opt/telephony/src/java/com/android/internal/telephony/Qualcomm42RIL.java:27: error: cannot find symbol
public class Qualcomm42RIL extends RIL implements CommandsInterface {
                                                  ^
  symbol: class CommandsInterface
frameworks/opt/telephony/src/java/com/android/internal/telephony/Qualcomm42RIL.java:47: error: cannot find symbol
    riljLog("[STUB] > getCellInfoList");
    ^
  symbol:   method riljLog(String)
  location: class Qualcomm42RIL
frameworks/opt/telephony/src/java/com/android/internal/telephony/Qualcomm42RIL.java:44: error: method does not override or implement a method from a supertype
  @Override
  ^
frameworks/opt/telephony/src/java/com/android/internal/telephony/Qualcomm42RIL.java:52: error: cannot find symbol
    RILRequest rr = RILRequest.obtain(111, paramMessage);
    ^
  symbol:   class RILRequest
  location: class Qualcomm42RIL
frameworks/opt/telephony/src/java/com/android/internal/telephony/Qualcomm42RIL.java:52: error: cannot find symbol
    RILRequest rr = RILRequest.obtain(111, paramMessage);
                    ^
  symbol:   variable RILRequest
  location: class Qualcomm42RIL
frameworks/opt/telephony/src/java/com/android/internal/telephony/Qualcomm42RIL.java:61: error: cannot find symbol
    RILRequest rr = RILRequest.obtain(109, paramMessage);
    ^
  symbol:   class RILRequest
  location: class Qualcomm42RIL
frameworks/opt/telephony/src/java/com/android/internal/telephony/Qualcomm42RIL.java:61: error: cannot find symbol
    RILRequest rr = RILRequest.obtain(109, paramMessage);
                    ^
  symbol:   variable RILRequest
  location: class Qualcomm42RIL
frameworks/opt/telephony/src/java/com/android/internal/telephony/Qualcomm42RIL.java:68: error: cannot find symbol
    riljLog("[STUB] > setCellInfoListRate");
    ^
  symbol:   method riljLog(String)
  location: class Qualcomm42RIL
frameworks/opt/telephony/src/java/com/android/internal/telephony/Qualcomm42RIL.java:73: error: cannot find symbol
    RILRequest rr = RILRequest.obtain(113, paramMessage);
    ^
  symbol:   class RILRequest
  location: class Qualcomm42RIL
frameworks/opt/telephony/src/java/com/android/internal/telephony/Qualcomm42RIL.java:73: error: cannot find symbol
    RILRequest rr = RILRequest.obtain(113, paramMessage);
                    ^
  symbol:   variable RILRequest
  location: class Qualcomm42RIL
frameworks/opt/telephony/src/java/com/android/internal/telephony/Qualcomm42RIL.java:80: error: cannot find symbol
    RILRequest rr = RILRequest.obtain(112, paramMessage);
    ^
  symbol:   class RILRequest
  location: class Qualcomm42RIL
frameworks/opt/telephony/src/java/com/android/internal/telephony/Qualcomm42RIL.java:80: error: cannot find symbol
    RILRequest rr = RILRequest.obtain(112, paramMessage);
                    ^
  symbol:   variable RILRequest
  location: class Qualcomm42RIL
Note: Some input files use or override a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
13 errors