Java 使用扫描仪在对象之间搜索方法

Question

我正在尝试在 java oop 中制作一个程序，其中我主要创建了一些人（每个人都有名字、年龄、状态：就业与否）。

我想按姓名搜索这些人并显示所有详细信息。

例如，如果有一个人叫约翰，我通过名字找到它，我想列出所有详细信息（状态、年龄等）。

我试图在 Person class 中实现这个方法。
我不知道创建一个包含所有人员和姓名的地图然后在其中搜索是否更好。

下面是我的代码：

人CLASS：

package app;

import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;


public class Person extends Employed {
Scanner scan = new Scanner(System.in);
private String name;
private int age;
private int kids;

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public int getAge() {
    return age;
}

public void setAge(int age) {
    this.age = age;
}

public int getKids() {
    return kids;
}

public void setKids(int kids) {
    this.kids = kids;
}

public Person(){
        System.out.println("************************************************************");
}

public void displayPerson(){
    if(super.getPeriod()==0 && super.getUnemploymentBenefit()==0){
        System.out.println(name + " is " + age + " years old, has " + kids + " kids and is employed" + "\nWorking Place: " + super.getWorkingPlace() 
                            + "\nSallary: " + df.format(super.getSallary()) + " EUR per year" + "\nWorking Time: " + super.getHours() + " hours per day");
    }else 
        System.out.println(name + " is " + age + " years old, has " + kids + " kids and is unemployed" +"\nUnemployment Time: " + Math.round(super.getPeriod()) 
                            + "\nUnemployment Benefit: " + df.format(super.getUnemploymentBenefit()) + " EUR per year");        
}




public void searchMethod(){
   System.out.println("Are you looking for someone?");
   String s = scan.nextLine();

   if(s==name) {
       System.out.println("Here are all the details about the person you are looking for: ");
   }
}

}

就业CLASS：

package app;

import java.text.DecimalFormat;


public class Employed extends Unemployed {
DecimalFormat df = new DecimalFormat("0.000");

private String WorkingPlace;
private double sallary;
private double hours;

public String getWorkingPlace() {
    return WorkingPlace;
}

public void setWorkingPlace(String WorkingPlace) {
    this.WorkingPlace = WorkingPlace;
}

public double getSallary() {
    return sallary;
}

public void setSallary(double sallary) {
    this.sallary = sallary;
}

public double getHours() {
    return hours;
}

public void setHours(double hours) {
    this.hours = hours;
}

}

失业CLASS：

package app;

public class Unemployed{

private double period;
private double UnemploymentBenefit;

public double getPeriod() {
    return period;
}

public void setPeriod(double period) {
    this.period = period;
}

public double getUnemploymentBenefit() {
    return UnemploymentBenefit;
}

public void setUnemploymentBenefit(double UnemploymentBenefit) {
    this.UnemploymentBenefit = UnemploymentBenefit;
}

}

计划CLASS：

package app;
public class Program extends Person{

public static void main(String[] args) {


    Person p1 = new Person();
    p1.setName("John Doe");
    p1.setAge(47);
    p1.setKids(3);
    p1.setWorkingPlace("IKEA");
    p1.setSallary(12.500);
    p1.setHours(12.5);
    p1.displayPerson();
    p1.searchMethod();

    Person p2 = new Person();
    p2.setName("Snow Tiffany");
    p2.setAge(27);
    p2.setKids(0);
    p2.setPeriod(15.9);
    p2.setUnemploymentBenefit(7.000);
    p2.displayPerson();







}
}

Answer 1

首先你应该添加一个构造器。

然后你可以从 class 人创建一个对象，如下所示：

 Person p1 = new Person("John Doe", 47,3, "IKEA", 12.500, 12.5);

 String personInfo = p1.get(..) + p1.get(..);

 System.out.println(personInfo);

您的代码有点混乱。 Java classes 应该有构造函数。一般来说，变量以小写字符开头。

Java 使用扫描仪在对象之间搜索方法

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