java : Parsing An ArrayList and setting them into a Object

Question

我有这两个类:

class Student
{
String name;
String age ;
}

class Person
{

String name;
String age ;
String grade ;
}

在下面的代码中，我创建了 Student 对象并将它们设置在 ArrayList 中。在 ArrayList 中设置数据后，我需要解析该 ArrayList 并在另一个对象中设置值:

public class Work {

    public static void main(String args[]) {

        List StudentItems = new ArrayList();

        Student stud1 = new Student();
        Student stud2 = new Student();

        stud1.name = "ABC";
        stud1.age = "28";
        stud2.name = "XYZ";
        stud2.age = "38";

        StudentItems.add(stud1);
        StudentItems.add(stud2);

        Person[] pers = new Person[StudentItems.size()];

        for (int i = 0; i < StudentItems.size(); i++) {
            pers[i] = new Person();

// I am confused here , could anyone please help 

        }

    }
}

Answer 1

尝试一下。这将完成工作

你的 Person 类应该是这样的:

package com.student.person.work;

/**
 *
 * @author sarath_sivan
 */
public class Person {

    private String name;
    private int age;
    private String grade;

    public String getName() {
       return this.name;
    }

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

    public int getAge() {
        return this.age;
    }

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

    public String getGrade() {
        return this.grade;
    }

    public void setGrade(String grade) {
        this.grade = grade;
    }

}

你的学生类应该是这样的:

package com.student.person.work;

/**
 *
 * @author sarath_sivan
 */
public class Student {

    private String name;
    private int age;

    public String getName() {
       return this.name;
    }

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

    public int getAge() {
        return this.age;
    }

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

}

最后，Work 类:

package com.student.person.work;

import java.util.ArrayList;
import java.util.List;

/**
 *
 * @author sarath_sivan
 */
public class Work {

    public static String calculateGrade() {
        String grade = "";
        // Your code to find the grade.
        //............
        return grade;
    }

    public static void doWork() {
        List<Student> studentList = new ArrayList<Student>();

        Student student = new Student();
        student.setName("ABC");
        student.setAge(24);
        studentList.add(student);

        student = new Student();
        student.setName("DEF");
        student.setAge(28);
        studentList.add(student);

        student = new Student();
        student.setName("GHI");
        student.setAge(21);
        studentList.add(student);

        List<Person> personList = new ArrayList<Person>();

        for(Student students : studentList) {
            Person person = new Person();
            person.setName(students.getName());
            person.setAge(students.getAge());
            person.setGrade(Work.calculateGrade());// Setting the grade
        }
    }

    public static void main(String[] args) {
        Work.doWork();
    }

}

希望这会有所帮助。

谢谢!