Update XRP examples

Author: rzblue

wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/examples/xrpreference/subsystems/Arm.java

@@ -5,9 +5,9 @@
 package edu.wpi.first.wpilibj.examples.xrpreference.subsystems;
 
 import edu.wpi.first.wpilibj.examples.xrpreference.devices.XRPServo;
-import edu.wpi.first.wpilibj2.command.Subsystem;
+import edu.wpi.first.wpilibj2.command.SubsystemBase;
 
-public class Arm extends Subsystem {
+public class Arm extends SubsystemBase {
   private final XRPServo m_armServo;
 
   /** Creates a new Arm. */

wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/examples/xrpreference/subsystems/Drivetrain.java

@@ -9,9 +9,9 @@
 import edu.wpi.first.wpilibj.drive.DifferentialDrive;
 import edu.wpi.first.wpilibj.examples.xrpreference.devices.XRPMotor;
 import edu.wpi.first.wpilibj.examples.xrpreference.sensors.XRPGyro;
-import edu.wpi.first.wpilibj2.command.Subsystem;
+import edu.wpi.first.wpilibj2.command.SubsystemBase;
 
-public class Drivetrain extends Subsystem {
+public class Drivetrain extends SubsystemBase {
   private static final double kGearRatio =
       (30.0 / 14.0) * (28.0 / 16.0) * (36.0 / 9.0) * (26.0 / 8.0); // 48.75:1
   private static final double kCountsPerMotorShaftRev = 12.0;

wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/examples/xrpreference/subsystems/XRPOnBoardIO.java

@@ -6,13 +6,13 @@
 
 import edu.wpi.first.wpilibj.DigitalInput;
 import edu.wpi.first.wpilibj.DigitalOutput;
-import edu.wpi.first.wpilibj2.command.Subsystem;
+import edu.wpi.first.wpilibj2.command.SubsystemBase;
 
 /**
  * This class represents the onboard IO of the XRP Reference Robot. This includes the USER
  * pushbutton and LED
  */
-public class XRPOnBoardIO extends Subsystem {
+public class XRPOnBoardIO extends SubsystemBase {
   private final DigitalInput m_button = new DigitalInput(0);
   private final DigitalOutput m_led = new DigitalOutput(1);
 

wpilibjExamples/src/main/java/edu/wpi/first/wpilibj/templates/xrpcommandbased/subsystems/XRPDrivetrain.java

@@ -7,9 +7,9 @@
 import edu.wpi.first.wpilibj.Encoder;
 import edu.wpi.first.wpilibj.drive.DifferentialDrive;
 import edu.wpi.first.wpilibj.templates.xrpcommandbased.devices.XRPMotor;
-import edu.wpi.first.wpilibj2.command.Subsystem;
+import edu.wpi.first.wpilibj2.command.SubsystemBase;
 
-public class XRPDrivetrain extends Subsystem {
+public class XRPDrivetrain extends SubsystemBase {
   private static final double kGearRatio =
       (30.0 / 14.0) * (28.0 / 16.0) * (36.0 / 9.0) * (26.0 / 8.0); // 48.75:1
   private static final double kCountsPerMotorShaftRev = 12.0;