创建一个可供所有实例访问的静态数组

Question

我试图创建一个静态数组来保存两个链接列表，这些列表将包含两个不同多项式的项。 Term类有两个表示Coefficient和Exponent的int值。我的问题是每次新的＆＃34;多项式＆＃34;它创建了一个新的Array实例。我试图使数组静态，但它给了我一个编译器错误，你不能通过修饰符。我的代码如下。谢谢你的帮助：

public class LinkedListInArrayPolynomial implements PolynomialInterface 
{

public boolean isFirst = true;
public Term firstTerm;
public int currentFree = 0;
Term[] PolynomialArray = new Term[100];
static class Term {
    public int coef;
    public int exp;

    public Term next;

    public Term(int coefIntput, int expInput) {
        this.coef = coefIntput;
        this.exp = expInput;
    }

    public String toString() {
        String output = "Coef is " + this.coef + " Exp is " + this.exp;
        return output;
    }

}

public void addToArray(Term term) {
    int marker = 0;
    boolean written = false;

    while (written = false) {
        if (PolynomialArray[marker] == null) {
            PolynomialArray[marker] = term;
            term.next = firstTerm;
            this.firstTerm = term;
            written = true;
        } else {
            marker++;
        }
    }
}

public LinkedListInArrayPolynomial() {
    firstTerm = null;
}

public LinkedListInArrayPolynomial(String input) {


    boolean FirstElementPos = true;
    int exponent;
    int coef;
    String tempExp = null;
    if (input.charAt(0) == '-') {
        input = input.substring(1);
        FirstElementPos = false;
    }

    String inputPolynomial = input.replaceAll("-", "+-");
    String[] splitTerms = inputPolynomial.split("\\+");

    for (int i = 0; i < splitTerms.length; i++) {
        String tempTerm = splitTerms[i];

        boolean tempPos;
        tempPos = true;
        if (tempTerm.contains("-")) {
            tempTerm = tempTerm.substring(1);

            tempPos = false;
        }
        int IndexOfexponent = tempTerm.indexOf('^');

        if (IndexOfexponent == -1) {
            if (tempTerm.indexOf('x') == -1) {
                exponent = 0;
            } else {
                exponent = 1;
            }

        } else {
            tempExp = tempTerm.substring(IndexOfexponent + 1);
            exponent = Integer.parseInt(tempExp);

        }

        String tempTermNoCarrot = tempTerm.replaceAll("\\^" + tempExp, "");
        String tempCoef = tempTermNoCarrot.replaceAll("x", "");

        coef = Integer.parseInt(tempCoef);

        if (tempPos == false || FirstElementPos == false) {
            coef = (coef * -1);
            tempPos = true;
            FirstElementPos = true;
        }
        Term newTerm = new Term(coef, exponent);
        System.out.println("Before insert");
        System.out.println(newTerm);
        PolynomialArray[currentFree] = newTerm;
        System.out.println("After insert");
        System.out.println(PolynomialArray[currentFree]
                + " At PolynomialArray[" + currentFree + "]");
        currentFree++;

        // this.addToArray(newTerm);

    }

}

public String toString() {
    String tempresult = "";
    Term current = firstTerm;
    while (current != null) {
        if (current.exp == 0) {
            tempresult += "+";
            tempresult += current.coef;

        } else {
            tempresult += "+";
            tempresult += current.coef;
            tempresult += "x^";
            tempresult += current.exp;

        }
        current = current.next;

    }

    tempresult = tempresult.replaceAll("\\^0", "");
    tempresult = tempresult.replaceAll("\\+-", "-");
    // System.out.println(" at 0 " + PolynomialArray[0].coef);
    System.out.println("tempresult before processing: " + tempresult);
    PolynomialInterface processingResult = new ArrayWithExponentAsIndexPolynomial(
            tempresult);
    return processingResult.toString();

}

@Override
public PolynomialInterface add(PolynomialInterface other) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public PolynomialInterface subtract(PolynomialInterface other) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public void readPolynomial() {
    // TODO Auto-generated method stub

}
}

**请注意我有多个System.out.print行可供调试。