java - 使用 Scanner 类为构造函数变量获取用户输入

问题描述

我正在尝试使用 Scanner 对象来接收用户输入，然后将其归因于名为 TargetHeartRateCalculator 的对象的以下值。

TargetHeartRateCalculator 采用构造函数参数..

字符串 fName，字符串 lName，int 月，int 日，int 年。

通常不使用扫描仪，我只会使用手动参数实例化对象，例如......

TargetHeartRateCalculator patient1 = new TargetHeartRateCalculator("Tom", "Willickers", 01, 25, 1966);

我需要使用扫描仪获取用户输入，然后从用户接收的输入中将值分配给 fName、lName、月、日、年。

我已经尝试通过语法不正确地将对象实例化作为通过 Scanner 对象分配用户输入的一部分，我什至不确定您是否应该这样做。

我觉得这可能是一个简单的解决方案，但答案对我来说非常回避。

这是我的司机课...


import java.util.Scanner;

public class DriverClass {



        //--------------------------------------------------------------------------------------
        //  TARGET HEART RATE CALCULATOR CLASS FUNCTIONALITY TEST
        //--------------------------------------------------------------------------------------

        TargetHeartRateCalculator patient1 = new TargetHeartRateCalculator("Tom", "Willickers", 01, 25, 1966);
        TargetHeartRateCalculator patient2 = new TargetHeartRateCalculator("Bill", "Skarsgard", 8,9, 1990);



        //Write a java app that prompts for the persons information
        //instantiates an object  and prints the information from that object
        //first name, last name, date of birth,
        // calculates maximum heart rate, and target heart rate.
        //and then displays them to the them.

        Scanner input = new Scanner(System.in);

        System.out.print("Please enter your first name: ");
        String fnInput = input.nextDouble();
        System.out.printf("%nThank you %s %s. Your date of birth is %n" +
                        "%d and you are %d years old!%n" +
                        "Your maximum heart rate is %.2f and your %n" +
                        "Target Heart Rate range is %.2f%n%n" get,



        patientInfo(patient1);
        patientInfo(patient2);

        displayAgeYears(patient1);
        displayAgeYears(patient2);

        displayMaxHeartRate(patient1);
        displayMaxHeartRate(patient2);

        displayTargetHeartRate(patient1);
        displayTargetHeartRate(patient2);


    }
}

这是我的课


import java.time.LocalDateTime;

public class TargetHeartRateCalculator {
    private String fName;
    private String lName;
    private int dOB;
    private int bMonth;
    private int bDay;
    private int bYear;
    private int ageYears;
    private double maxHeartRate;
    private double lowTargetHearRate;
    private double highTargetHearRate;

    LocalDateTime now = LocalDateTime.now();
    int cYear = now.getYear();
    int cMonth = now.getMonthValue();
    int cDay = now.getDayOfMonth();

    //constructor
    public TargetHeartRateCalculator(String fNameIn, String lNameIn, int monthIn, int dayIn, int yearIn) {
        fName = fNameIn;
        lName = lNameIn;
        bMonth = monthIn;
        bDay = dayIn;
        bYear = yearIn;
    }

    public String getfName() {
        return fName;
    }

    public void setfName(String fName) {
        this.fName = fName;
    }

    public String getlName() {
        return lName;
    }

    public void setlName(String lName) {
        this.lName = lName;
    }

    public int getBMonth() {
        return bMonth;
    }

    public void setBMonth(int month) {
        this.bMonth = month;
    }

    public int getBDay() {
        return bDay;
    }

    public void setBDay(int day) {
        this.bDay = day;
    }

    public int getBYear() {
        return bYear;
    }

    public void setBYear(int year) {
        this.bYear = year;
    }

    public int getAgeYear(){
        int currentAgeYear = cYear -bYear;
        return currentAgeYear;
    }

    public int getAgeMonth(){
        int currentAgeMonth =cMonth - bMonth;
        return currentAgeMonth;
    }

    public int getAgeDay(){
        int currentAgeDay =cDay - bDay;
        return currentAgeDay;
    }



    public String getdOB(TargetHeartRateCalculator patient) {

        String dOB = String.format("%s/%s/%s",
        patient.getBMonth(), patient.getBDay(), patient.getBYear());

        return dOB;
    }

    public void setdOB(int dOB) {
        this.dOB = dOB;
    }

    public static String displayAgeYears(TargetHeartRateCalculator patient) {

        String ageYears = String.format("%s %s is %s Years old",
                patient. getfName(), patient.getlName(), patient.getAgeYear());

        return ageYears;
    }

    public void setAgeYears(int ageYears) {

        this.ageYears = ageYears;
    }

    public double getMaxHeartRate() {
        double maxHeartRate = (220 - getAgeYear()) ;

        return maxHeartRate;
    }

    public void setMaxHeartRate(int maxHeartRate) {
        this.maxHeartRate = maxHeartRate;
    }

    public double getLowTargetHearRate() {
          lowTargetHearRate = getMaxHeartRate() * .5;

        return lowTargetHearRate;
    }

    public void setLowTargetHearRate(int lowTargetHearRate) {
        this.lowTargetHearRate = lowTargetHearRate;
    }

    public double getHighTargetHeartRate(){
        highTargetHearRate = getMaxHeartRate() * .85;

        return highTargetHearRate;
    }

    public void setHighTargetHearRate(){
        this.highTargetHearRate = highTargetHearRate;
    }

    public static String displayTargetHeartRate(TargetHeartRateCalculator patient){
        String hRateRange = String.format("%.2f BPM - %.2f BPM", patient.getLowTargetHearRate(), patient.getHighTargetHeartRate());

        return hRateRange;
    }

    public static String displayMaxHeartRate(TargetHeartRateCalculator patient){
        String mHeartRate = String.format("%.2f BPM", patient.getMaxHeartRate());

        return mHeartRate;
    }




    public static String patientInfo(TargetHeartRateCalculator patient) {

        String result = String.format("Patient Name: %s %s DOB: %d/%d/%d",
                patient.getfName(), patient.getlName(), patient.getBMonth(), patient.getBDay(), patient.getBYear());

        return result;


    }
}

标签： java

如果我理解正确，您是在尝试输入构造函数吗？我将显示一个字段，因为其余字段都相同

Scanner input = new Scanner(System.in);

System.out.print("Please enter your first name: ");
String fnInput = input.nextLine();
// repeat print and scan, as needed 

TargetHeartRateCalculator patient1 = TargetHeartRateCalculator(fnInput);  // add more parameters

然后你会想要实例方法，而不是带参数的静态方法。

public void patientInfo() {
    System.out.printf("%s%n", this.getfName()); // for example 
}

你像这样调用这些方法

patient1.patientInfo();

而且我认为您应该从主要方法中删除打印语句

java - 使用 Scanner 类为构造函数变量获取用户输入

问题描述

解决方案

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