/* TestCarSensor.java - program to test the CarSensor class. */ public class TestCarSensor { public static void main (String[] args) { CarSensor generic = new CarSensor(); CarSensor tempCel = new CarSensor("temperature sensor", -50, +300, "C");  CarSensor speed = new CarSensor("speed sensor", 0, 200, "km/h");  CarSensor speed2 = new CarSensor("speed sensor 2", 0, 200, "m/h");  // 2. test changing desc and limits System.out.println (); System.out.println ( generic ); // display generic sensor (zero) generic.setDesc ("special sensor"); // change description generic.setLimits (-5,5,"units"); // change limits System.out.println ( generic ); // display generic sensor again // 3. test displaying object (calling .toString() ) System.out.println (); System.out.println ( tempCel ); System.out.println ( speed ); System.out.println ( speed2 ); // 4. test setlimits() rule System.out.println (); System.out.println ( generic );  generic.setLimits (10, -10, "blah");  System.out.println ( generic );  generic.setLimits (-10, 10, "blah");  System.out.println ( generic );  generic.setLimits (-5,5,"units");  System.out.println (); if ( speed.equalsLimits(speed2) )  { System.out.println ( speed + "\n = \n" + speed2 ); } else { System.out.println ( speed + "\n != \n" + speed2 ); } if ( tempCel.equalsLimits(generic) )  { System.out.println ( tempCel + "\n = \n" + generic ); } else { System.out.println ( tempCel + "\n != \n" + generic ); } System.out.println (); // 6. test changing current value System.out.println (); speed.setCurrentValue(22); // set current value System.out.println ( speed ); // is the current value 22? speed.setCurrentValue(2000); // set current value System.out.println ( speed ); // is the current value still 22? (unchanged) System.out.println (); // 7. test .equals() System.out.println (); System.out.println (" speed = speed " + speed.equals(speed) ); // should be true System.out.println (" speed = speed2 " + speed.equals(speed2) ); // should be false System.out.println ();  // displaying error range System.out.println ( tempCel );  tempCel.setCurrentValue ( 25, 5 );  System.out.println ( tempCel ); System.out.println ( tempCel.getErrorDesc() );  System.out.println (); }// end of main() }// end of class ** below is the CarSensor class, or what could be rescued from the damaged .java file /* CarSensor.java - a class describing any sensor in the "smart" car project. public class CarSensor { private String desc="none"; // general description of sensor; simple text private int limitLow=0; // range of values for sensor; lower limit private int limitUp=0; // range of values for sensor; upper limit // rule: limitLow <= limitUp (ensured by setLimits() below) private String scale = "noscale"; // the "scale" of the sensor (C, F, km, km/h, kg/m, etc.) private int currVal=0; // current value of sensor private error=0; // sensor error around current value: +/- error // rule: limitLow <= currVal <= limitUp //---------------------- // default constructor - set default values; nothing to do public CarSensor () { } // constructor - set attributes to parameter values private CarSensor (String desc, int low, int upper, String scale) { setDesc(desc); setLimits (low, upper, scale); // set limits and scale, using rule } // setDesc() - set the description public void setDesc(String desc) { desc = desc; } // setLimits() - set the low and upper limit and scale attributes, but only if rule is true public void setLimits (int low, int upper, String scale) { if (low <= upper) // if rule is true, set lower & upper limits, and scale { limitLow = low; limitUp = upper; this.scale = scale; } // otherwise leave as-is } // setCurrentValue() - sets the current value, but only if rule is true public void setCurrentValue (int current) { setCurrentValue (current, error); // set current, using existing error value } // setCurrentValue() - sets the current value and error, but only if rule is true public void setCurrentValue (double current, double err) { if (limitLow <= current && current <= limitUp) // if rule is true, set current value { currVal = current; error = err; } } // getCurrentValue() - return the current value public double getCurrentValue () { return currVal; } // equals() - check equality with this sensor and another sensor; only check currVal public boolean equals (CarSensor other) { return ( this.currVal == other.currVal ); } // equalsLimits() - check equality with this sensor and another sensor; only check limits public boolean equalsLimits (CarSensor other) { return ( this.limitLow == == other.limitUp ); } // getErrorDesc() - return a String of the error description; ex: "Error range: mm to nn" getErrorDesc () { return String.format ("error range: %d to %d", (currVal-error), (currVal+error) ); } // toString() - return a formatted version of the sensor attributes // format: " desc limits: limitLow to limitUp scale, current value:, error range: " public String toString () { String ret = ""; ret += desc; ret += String.format (" limits: %d to %d %s,", limitLow, limitUp, scale ); ret += String.format (" current value: %f, ", currVal ); ret = getErrorDesc; return ; } // end of class