I don't know what is the problem with this code.
public Polynomial negate(){
int i;
for(i = 0; i<this.coefficients.length;i++){
this.coefficients[i] = -this.coefficients[i];
}
return this;
}
Polynomial is the name of the class and coefficients[] is an array of the coefficients. This method is supposed to return the array with all its values negated, but instead it returns some weird directions like [D@5afaa824
That depends on the rest of your code. By itself, the code you wrote looks valid. Without seeing anything else, I'd imagine the problem is either:
1) The calling code is expecting an array, and instead is receiving a Polynomial
To fix this, change the method to return an int[] as so:
public int[] negate(){
int i;
for(i = 0; i<this.coefficients.length;i++){
this.coefficients[i] = -this.coefficients[i];
}
return this.coefficients;
}
2) The calling code is expecting a polynomial, but not using it correctly
If you have something like this:
System.out.print(myPolynomial.negate());
then you're going to have a bad time. Try replacing it with something like this:
myPolynomial.negate();
System.out.println(Arrays.toString(myPolynomial.coefficients));
System.out.print;
System.out.println(Arrays.toString(mPolynomial.coefficients));.
It is supposed do be called by this other method this way :
Polynomial test = new Polynomial(4);
// Give values
test.negate().evaluate(5)
This is the evaluate method:
public double evaluate(double x){
double result = 0;
for(int i = 0; i< coefficients.length;i++){
result +=coefficients[i] * Math.pow(x,i);
}
return result;
}
Arrays.toString(array)to print the contents of an array in a sane manner.