Ich versuche, einen Booleschen Test durchzuführen, damit bei einem Reifendruck unter 35 oder über 45 das System "schlechtes Aufpumpen" ausgibt.

In meiner Klasse muss ich einen Booleschen Wert verwenden, den ich ausprobiert habe. Der zurückgegebene Boolesche Wert ist jedoch immer wahr. Ich verstehe nicht warum.

public class tirePressure
{
    private static double getDoubleSystem1 ()  //Private routine to simply read a double in from the command line
    {
        String myInput1 = null; //Store the string that is read form the command line
        double numInput1 = 0;      //Used to store the converted string into an double
        BufferedReader mySystem; //Buffer to store input
        mySystem = new BufferedReader (new InputStreamReader (System.in)); // creates a connection to system files or cmd
        try
        {
            myInput1 = mySystem.readLine (); //reads in data from console
            myInput1 = myInput1.trim (); //trim command cuts off unneccesary inputs
        }
        catch (IOException e)  //checks for errors
        {
            System.out.println ("IOException: " + e);
            return -1;
        }

        numInput1 = Double.parseDouble (myInput1); //converts the string to an double
        return numInput1;                       //return double value to main program
    }

    static public void main (String[] args)
    {
        double TireFR; //double to store input from console
        double TireFL;
        double TireBR;
        double TireBL;
        boolean goodPressure;
        goodPressure = false;

        System.out.println ("Tire Pressure Checker");
        System.out.println (" ");

        System.out.print ("Enter pressure of front left tire:");
        TireFL = getDoubleSystem1 ();    //read in an double from the user

        if (TireFL < 35 || TireFL > 45)
        {
            System.out.println ("Pressure out of range");
            goodPressure = false;
        }

        System.out.print ("Enter pressure of front right tire:");
        TireFR = getDoubleSystem1 ();    //read in an double from the user

        if (TireFR < 35 || TireFR > 45)
        {
            System.out.println ("Pressure out of range");
            goodPressure = false;

        }

        if (TireFL == TireFR)
            System.out.print (" ");
        else
            System.out.println ("Front tire pressures do not match");
        System.out.println (" ");

        System.out.print ("Enter pressure of back left tire:");
        TireBL = getDoubleSystem1 ();    //read in an double from the user

        if (TireBL < 35 || TireBL > 45)
        {
            System.out.println ("Pressure out of range");
            goodPressure = false;
        }

        System.out.print ("Enter pressure of back right tire:");
        TireBR = getDoubleSystem1 ();    //read in an double from the user

        if (TireBR < 35 || TireBR > 45)
        {
            System.out.println ("Pressure out of range");
            goodPressure = false;
        }

        if (TireBL == TireBR)
            System.out.print (" ");
        else
            System.out.println ("Back tire pressures do not match");

        if (goodPressure = true)
            System.out.println ("Inflation is OK.");
        else
            System.out.println ("Inflation is BAD.");

        System.out.println (goodPressure);


    } //mainmethod
} // tirePressure Class