Assign courseStudent\'s name with Smith, age with 20, and ID with 9999. Use the

Question

Assign courseStudent's name with Smith, age with 20, and ID with 9999. Use the print member method and a separate println statement to output courseStudents's data. Sample output from the given program: Name: Smith, Age: 20, ID: 9999

// ===== Code from file PersonData.java =====
public class PersonData {
private int ageYears;
private String lastName;

public void setName(String userName) {
lastName = userName;
return;
}

public void setAge(int numYears) {
ageYears = numYears;
return;
}

// Other parts omitted

public void printAll() {
System.out.print("Name: " + lastName);
System.out.print(", Age: " + ageYears);
return;
}
}
// ===== end =====

// ===== Code from file StudentData.java =====
public class StudentData extends PersonData {
private int idNum;

public void setID(int studentId) {
idNum = studentId;
return;
}

public int getID() {
return idNum;
}
}
// ===== end =====

// ===== Code from file StudentDerivationFromPerson.java =====
public class StudentDerivationFromPerson {
public static void main (String [] args) {
StudentData courseStudent = new StudentData();

courseStudent.setID(9999);
courseStudent.setAge(20);
courseStudent.setName("Smith");

System.out.println(courseStudent); /* Your solution goes here */

return;
}
}
// ===== end =====

Explanation / Answer

PersonData.java

package com.chegg.questions;

public class PersonData {
   private int ageYears;
   private String lastName;

   public void setName(String userName) {
       lastName = userName;
       return;
   }

   public void setAge(int numYears) {
       ageYears = numYears;
       return;
   }

   // Other parts omitted
   public void printAll() {
       System.out.print("Name: " + lastName);
       System.out.print(", Age: " + ageYears);
   }

}

StudentData.java

package com.chegg.questions;

public class StudentData extends PersonData {
   private int idNum;

   public void setID(int studentId) {
       idNum = studentId;
       return;
   }

   public int getID() {
       return idNum;
   }

   public void printAll() {
       super.printAll();
       System.out.print(",ID: " + idNum);
   }

}

StudentDerivationFromPerson.java

package com.chegg.questions;

public class StudentDerivationFromPerson {
   public static void main(String[] args) {
       StudentData courseStudent = new StudentData();
       courseStudent.setID(9999);
       courseStudent.setAge(20);
       courseStudent.setName("Smith");
       // Don't need to use System.out.print as inside the methods you are
       // already doing
       courseStudent.printAll();
   }
}

Output:

Name: Smith, Age: 20,ID: 9999

Note:Standard way to display the object contents

StudentDerivationFromPerson.java

package com.chegg.questions;

public class StudentDerivationFromPerson {
   public static void main(String[] args) {
       StudentData courseStudent = new StudentData();
       courseStudent.setID(9999);
       courseStudent.setAge(20);
       courseStudent.setName("Smith");
       System.out.println(courseStudent.toString());
   }
}

StudentData.java

package com.chegg.questions;

public class StudentData extends PersonData {
   private int idNum;

   public void setID(int studentId) {
       idNum = studentId;
       return;
   }

   public int getID() {
       return idNum;
   }

   public String toString() {
       return (super.toString() + ",ID: " + idNum);
   }

}

PersonData.java

package com.chegg.questions;

public class PersonData {
   private int ageYears;
   private String lastName;

   public void setName(String userName) {
       lastName = userName;
       return;
   }

   public void setAge(int numYears) {
       ageYears = numYears;
       return;
   }

   public String toString() {

       return ("Name: " + lastName + ", Age: " + ageYears);
   }
}

Output:

Name: Smith, Age: 20,ID: 9999

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