ComplexNumClass

package niit.summer.complex;
import java.text.DecimalFormat;

public class ComplexNumber {

    public static final ComplexNumber ZERO = new ComplexNumber(0,0);
    private double real;
    private double imaginary;
    DecimalFormat decimalFormat = new DecimalFormat("0.###");

    public ComplexNumber(double real, double imaginary) {
        this.real = real;
        this.imaginary = imaginary;
    }
    public double GetReal () {return real; }

    public double GetImaginary () {return imaginary; }

    public ComplexNumber add(ComplexNumber z2) {
        return new ComplexNumber(real + z2.real, imaginary + z2.imaginary);
    }

    public ComplexNumber multiply(ComplexNumber z2) {
        return new ComplexNumber(real * z2.real - imaginary * z2.imaginary,imaginary * z2.real + real * z2.imaginary);
    }

    /* (non-Javadoc)
     * @see java.lang.Object#equals(java.lang.Object)
     */
    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null) {
            return false;
        }
        if (!(obj instanceof ComplexNumber)) {
            return false;
        }
        ComplexNumber other = (ComplexNumber) obj;
        if (Double.doubleToLongBits(imaginary) != Double.doubleToLongBits(other.imaginary)) {
            return false;
        }
        if (Double.doubleToLongBits(real) != Double.doubleToLongBits(other.real)) {
            return false;
        }
        return true;
    }

    /* (non-Javadoc)
     * @see java.lang.Object#hashCode()
     */
    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        long temp;
        temp = Double.doubleToLongBits(imaginary);
        result = prime * result + (int) (temp ^ (temp >>> 32));
        temp = Double.doubleToLongBits(real);
        result = prime * result + (int) (temp ^ (temp >>> 32));
        return result;
    }

    public double abs() {
            return Math.sqrt(Math.pow(real, 2) + Math.pow(imaginary, 2));
    }

    public double arg() {

        double argRes = 0;

        if(real < 0 && imaginary >= 0){
            argRes = Math.PI + Math.atan(imaginary/real);
        }
        else if(real < 0 && imaginary < 0){
            argRes = (-Math.PI) + Math.atan(imaginary/real);
        }
        else if(real == 0 && imaginary > 0){
            argRes = Math.PI / 2;
        }
        else if(real == 0 && imaginary < 0){
            argRes = (-Math.PI) / 2;
        }
        else if(real > 0){
            argRes = Math.atan(imaginary/real);
        }
        else{
            argRes = Double.NaN;
        }

    return argRes;
    }

        public class AlgebraicRepresentation {

            public double aReal, aImaginary;

            public double getReal() {return aReal; }
            public double getImaginary() {return aImaginary; }
            /* (non-Javadoc)
             * @see java.lang.Object#toString()
             */
            @Override
            public String toString() {
                String formatNumber = null;
                String formatReal = "", formatImag = "";
                DecimalFormat decimalFormat = new DecimalFormat("0.###");

                if(aReal == 0 && aImaginary == 0){
                    formatNumber = decimalFormat.format(0);
                }
                else if(aReal == 0){
                    formatNumber = decimalFormat.format(aImaginary);
                    formatNumber = String.format("%s" + "i", formatNumber);
                }
                else if(aImaginary == 0){
                    formatNumber = decimalFormat.format(aReal);
                    formatNumber = String.format("%s", formatNumber);
                }
                else if (aReal != 0 && aImaginary != 0){
                    formatReal = decimalFormat.format(aReal);
                    formatImag = decimalFormat.format(aImaginary);
                    formatNumber = String.format("%s" + " + " + "%s" + "i", formatReal, formatImag);
                }
                return formatNumber;
            }

        }

    public AlgebraicRepresentation asAlgebraic() {
        AlgebraicRepresentation algVers = new AlgebraicRepresentation();
        algVers.aReal = ComplexNumber.this.GetReal();
        algVers.aImaginary = ComplexNumber.this.GetImaginary();
        return algVers;
    }

            public class TrigonometricRepresentation {

                private double tReal, tImaginary;


                public double gettReal(){ return tReal;}
                public double gettImaginary(){ return tImaginary;}

                public double getAbsoluteValue() {
                   double result = ComplexNumber.this.abs();
                   return result;
                   }

                 public double getArgument() {
                     double arg = ComplexNumber.this.arg();
                     return arg;
                   }

                 double r = TrigonometricRepresentation.this.getAbsoluteValue();
                 double fi = TrigonometricRepresentation.this.getArgument();
                 double fiDegree = (fi*180) / Math.PI;



                /* (non-Javadoc)
                 * @see java.lang.Object#toString()
                 */
                @Override
                public String toString() {
                    String formatNumber = null;
                    String formatAbs = "", formatArg = "";
                    DecimalFormat decimalFormat = new DecimalFormat("0.###");

                    if(tReal == 0 && tImaginary == 0){
                        formatNumber = decimalFormat.format(0);
                    }
                    else if(tReal == 0){
                        formatArg = decimalFormat.format(fiDegree);
                        formatNumber = String.format("i" + "*" + "sin" + "%s" + "°", formatArg);
                        System.out.println(formatNumber);
                    }
                    else if(tImaginary == 0){
                        formatNumber = decimalFormat.format(tReal);
                        formatNumber = String.format("%s", formatNumber);
                        System.out.println(formatNumber);
                    }
                    else if (tReal != 0 && tImaginary != 0){
                        formatAbs = decimalFormat.format(r);
                        formatArg = decimalFormat.format(fiDegree);
                        formatNumber = String.format("%s" + "(" + "cos" + "%s" + "°" + "+" + "i" + "*" + "sin" + "%s" + "°" +")", formatAbs, formatArg, formatArg);
                        System.out.println(formatNumber);
                    }
                    return formatNumber;
                }
               }

        public TrigonometricRepresentation asTrigonometric() {
            TrigonometricRepresentation trigVers = new TrigonometricRepresentation();
            trigVers.tReal = ComplexNumber.this.GetReal();
            trigVers.tImaginary = ComplexNumber.this.GetImaginary();
            return trigVers;
            }
}