如何设置具有相关项的数组

Question

我将如何链接两个数组，使每个变量与它自己的指数相关？我不想让这个变量和它的指数在不同数组的同一个索引中。我想知道如何有一个更有保证的方式，数据将得到妥善处理。

Answer 1

首先创建一个POJO类，将多项式变量存储在系数、变量、指数字段中。

然后从另一个班给他们打电话；

这里是POJO类，我称之为Element；

public class Element {

    private double coefficient;
    private int exponent;
    private String variable;

    public Element(double coefficient, String variable, int exponent ) {
        this.coefficient = coefficient;
        this.variable = variable;
        this.exponent = exponent;
    }

    public double getCoefficient() {
        return coefficient;
    }

    public void setCoefficient(double coefficient) {
        this.coefficient = coefficient;
    }

    public String getVariable() {
        return variable;
    }

    public void setVariable(String variable) {
        this.variable = variable;
    }

    public int getExponent() {
        return exponent;
    }

    public void setExponent(int exponent) {
        this.exponent = exponent;
    }

}

public class TestPolynomials {

    public static void main(String[] args) {
        Element[] polynomialList = { new Element(5,"x",2), new Element(1,"y",3), new Element(6,"1",0) };

        printPolynomials(polynomialList);

    }

    public static void printPolynomials( Element[] pList ) {
        for( int i = 0; i < pList.length; i++ ) {
            System.out.printf("%2.1f*%s*%d, ", pList[i].getCoefficient(), pList[i].getVariable(), pList[i].getExponent() );
        }
    }

}

5.0*x*2
1.0*y*3
6.0*1*0