Java 在构造函数上声明日期

刚开始学习java，还有一个练习要完成

我有以下代码：

package exercise1;

import java.text.SimpleDateFormat;
import java.util.Date;

public class Singer {

//Class Parameters
int id;
String name;
String address;
Date dob;
int nAlbums;

//Overloaded Constructors
public Singer()
{
    
}

public Singer(int id)
{
this.id = id;
}

public Singer(int id, String name)
{
this.id = id;
this.name = name;
}

public Singer(int id, String name, String address)
{
this.id = id;
this.name = name;
this.address = address;
}

public Singer(int id, String name, String address, Date dob)
{
this.id = id;
this.name = name;
this.address = address;
this.dob = dob;
}

public Singer(int id, String name, String address, Date dob, int nAlbums)
{
this.id = id;
this.name = name;
this.address = address;
this.dob = dob;
this.nAlbums = nAlbums;
}

//All Setters
public void setId (int id)
{

    this.id = id;
    
}

public void setName (String name)
{

    this.name = name;
    
}

public void setAddress (String address)
{

    this.address = address;
    
}

public void setDOB (Date dob)
{

    this.dob = dob;
    
}

public void setNAlbums (int nAlbums)
{

    this.nAlbums = nAlbums;
    
}

public void setSinger (int id, String name, String address, Date dob, int nAlbums)
{
    this.id = id;
    this.name = name;
    this.address = address;
    this.dob = dob;
    this.nAlbums = nAlbums;
    
}

//All Getters

public int ID ()
{
    return id;
}

public String Name ()
{
    return name;
}

public String Address ()
{
    return address;
}

public Date DOB ()
{
    return dob;
}

public int NAlbums ()
{
    return nAlbums;
}

public String Display()
{
    return "\nID: " + id + "\nName: " + name + "\nAddress: " + address + "\nBirthday: " +dob+ "\nNumber of Albums: "+nAlbums;
}
public static void main(String[] args) {
    
    String pattern = "yyyy-MM-dd";
    SimpleDateFormat sdf = new SimpleDateFormat(pattern);
    
    Singer singer1 = new Singer();

    System.out.println("\nID (singer1): "+ singer1.id);

    System.out.println("\nName (singer1) :"+ singer1.name);

    System.out.println("\nAddress (singer1) :"+ singer1.address);
    
    System.out.println("\nBirthday (singer1) :"+ singer1.dob);
    
    System.out.println("\nNumber of Albums (singer1) :"+ singer1.nAlbums);

        singer1.setSinger(1, "Davy Jones", "12 Main Street", sdf.parse("1947-01-08"), 27);
            
    System.out.println("\nsinger1 Details: "+ singer1.Display());

        
}

}

因此发生了两个错误：

它要求我抛出一个异常

即使我接受更正，我也会通过以下格式收到日期：

1详细信息：
身份证号码：1
姓名：戴维·琼斯
地址：美因街12号
生日：星期三1947年1月8日00:01:00东部时间
专辑数量：27张

使用Eclipse

提前谢谢你的帮助

编辑

感谢您的帮助，以下是最终代码：

package exercise1;

import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.Locale;

public class Singer {

//Class Parameters
int id;
String name;
String address;
LocalDate dob;
int nAlbums;

//Overloaded Constructors
public Singer()
{
    
}

public Singer(int id)
{
this.id = id;
}

public Singer(int id, String name)
{
this.id = id;
this.name = name;
}

public Singer(int id, String name, String address)
{
this.id = id;
this.name = name;
this.address = address;
}

public Singer(int id, String name, String address, LocalDate dob)
{
this.id = id;
this.name = name;
this.address = address;
this.dob = dob;
}

public Singer(int id, String name, String address, LocalDate dob, int nAlbums)
{
this.id = id;
this.name = name;
this.address = address;
this.dob = dob;
this.nAlbums = nAlbums;
}

//All Setters
public void setId (int id)
{

    this.id = id;
    
}

public void setName (String name)
{

    this.name = name;
    
}

public void setAddress (String address)
{

    this.address = address;
    
}

public void setDOB (LocalDate dob)
{

    this.dob = dob;
    
}

public void setNAlbums (int nAlbums)
{

    this.nAlbums = nAlbums;
    
}

public void setSinger (int id, String name, String address, LocalDate dob, int nAlbums)
{
    this.id = id;
    this.name = name;
    this.address = address;
    this.dob = dob;
    this.nAlbums = nAlbums;
    
}

//All Getters

public int ID ()
{
    return id;
}

public String Name ()
{
    return name;
}

public String Address ()
{
    return address;
}

public LocalDate DOB ()
{
    return dob;
}

public int NAlbums ()
{
    return nAlbums;
}

public String Display()
{
    return "\nID: " + id + "\nName: " + name + "\nAddress: " + address + "\nBirthday: " +dob+ "\nNumber of Albums: "+nAlbums;
}
public static void main(String[] args) {
    
    Singer singer1 = new Singer();
    
    System.out.println("\nID (singer1): "+ singer1.id);

    System.out.println("\nName (singer1) :"+ singer1.name);

    System.out.println("\nAddress (singer1) :"+ singer1.address);
    
    System.out.println("\nBirthday (singer1) :"+ singer1.dob);
    
    System.out.println("\nNumber of Albums (singer1) :"+ singer1.nAlbums);

    singer1.id = 1;
    
    singer1.name = "Davy Jones";
    
    singer1.address = "12 Main Street";
    
    String string = "January 08, 1947";
    
    DateTimeFormatter pattern = DateTimeFormatter.ofPattern("MMMM dd, yyyy", Locale.ENGLISH);
    
    LocalDate date = LocalDate.parse(string, pattern);
    
    singer1.dob = date;
    
    singer1.nAlbums = 27;
    
    System.out.println("\nAll singer properties set\n");
    
    System.out.println("\nsinger1 Details: "+ singer1.Display());
    

}

---

}

这个问题需要澄清：您遇到了一个java错误，要求您抛出一个ParseException或捕获一个？不管是哪种方式，我们为什么要在这里这样做？Oracle doc表示SimpleDataFormat的各种构造函数和方法都可以抛出NullPointerException或IllegalArgumentException。我在任何地方都看不到ParseException。#1请参阅顶部的链接，该链接解释了什么是选中的异常。--#2：这是打印

Date

值时的默认格式，如

Date

方法的javadoc中所述。如果需要其他格式，请使用

SimpleDateFormat

并调用

format（）

方法。我建议不要使用

SimpleDateFormat

和

Date

。这些类设计得很糟糕，而且早已过时，其中前者尤其令人讨厌。而是使用

LocalDate

和

DateTimeFormatter

，两者都来自。这也不需要声明

thorws ParseException

，它会将日期显示为

1947-01-08

，非常感谢您的回复。根据@OleV.V。建议我把重点放在本地日期上。它确实感觉更平滑了。再次感谢！