Question

修改Student类，以便现在不再进行3次测试 100个测试的数组。但是，并非所有分数都可以设定。您需要添加一个额外的字段来跟踪测试的数量目前正在存储。您需要修改setTest和getTest 同样。此外，添加一个名为addTest的方法，该方法将添加一个新测试在适当的位置得分。

这是我必须编写/修改的代码，这是我用它完成的。

package net.apcs.classes;

import java.util.Arrays;

public class Student {

    private String FirstName;
    private String LastName;
    private double[] Tests = new double[100];
    private int NumberOfTests;

    public Student(String firstName, String lastName, double[] tests, int numberOfTests) {
        FirstName = firstName;
        LastName = lastName;
        tests = new double[100];
        NumberOfTests = numberOfTests;
    }

    public Student() {
        FirstName = "";
        LastName = "";
        Tests = new double[100];
        NumberOfTests = 0;
    }

    public String getFirstName() {
        return FirstName;
    }

    public String getLastName() { return LastName; }

    public double getTest(int testNum) {
        return Tests[testNum];
    }

    public void setFirstName(String firstName) {
        FirstName = firstName;
    }

    public void setLastName(String lastName) {
        LastName = lastName;
    }

    public void setTest(int testNum, double testScore, double[] tests) {
        tests[testNum] = testScore;
    }

    public double getAverage(double[] tests, int numberOfTests) {
        int i = 0;
        double sum = 0;
        while (i < numberOfTests) {
            sum = sum + tests[i];
            i++;
        }
        double average = sum / numberOfTests;
        return average;
    }

    public double getHighScore(double[] tests, int numberOfTests) {
        double max = 0;

        for (int i = 0; i < numberOfTests; i++) {
            if (tests[i] > max) {
                max = tests[i];
            }
        }

        return max;
    }

    @Override
    public String toString() {
        return "Student{" +
                "FirstName='" + FirstName + '\'' +
                ", LastName='" + LastName + '\'' +
                ", " + Arrays.toString(Tests);
    }
}

有人可以查看一下，看看我是否正确实现了数组？我不确定我是否正确使用它们，以及代码是否会按照预期执行。（在任何人问之前，我不知道如何用数组创建一个对象并测试程序是否有效，所以如果有人能告诉我如何做到这一点，我将非常感激。） / p>

Answer 1

尝试编写像这样的数组和构造函数：

     private double[] Tests = null;
     private int NumberOfTests;

   public Student(String firstName, String lastName, int numberOfTests) {
    this.FirstName = firstName;
    this.LastName = lastName;
    this.Tests =new double[100];
    this.NumberOfTests = numberOfTests;
     }

在Java类中实现数组

1 个答案: