package Lecture_7; public class Student implements Comparable<Object>{ Integer a

ID: 3928880 • Letter: P

Question

package Lecture_7;

public class Student implements Comparable<Object>{
   Integer age;
   String state;
   String firstName;
   String lastName;

   public Student(Integer age, String state, String firstName, String lastName){
       this.setAge(age);
       this.setState(state);
       this.setFirstName(firstName);
       this.setLastName(lastName);
   }

   public Integer getAge(){
       return age;
   }

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

   public String getState(){
       return state;
   }

   public void setState(String state){
       this.state = state;
   }

   public String getFirstName(){
   return firstName;
   }

   public void setFirstName(String firstName){
   this.firstName = firstName;
   }

   public String getLastName(){
       return lastName;
   }

   public void setLastName(String lastName){
   this.lastName = lastName;
   }

   @Override
   public int compareTo(Object o) {
       Student nStudent = (Student)o;
   return this.getAge().compareTo(nStudent.getAge());
   }
   @Override
   public String toString(){
       return String.format("%3d %10s",this.getAge(), this.getState(),this,getFirstName(),this.getLastName());
           }

}

I am stuck in the last part of "return String.format("%3d %10s",this.getAge(), this.getState(),this,getFirstName(),this.getLastName())"

my output only gives me age and state, however I need my output to print age, state, FirstName, and LastName. What do I need to add in "%3d %10s"<---- in there so my program will print all 4 variables, please advise.

Explanation / Answer

You need to include more placeholders to print FirstName and LastName. Just add "%s %s" to the line you are trying to output.

Therefore, the line becomes,

return String.format ("%3d %10s %s %s", this.getAge(), this.getState(), this.getFirstName(), this.getLastName());

Therefore, the complete program is:

public class Student implements Comparable<Object>{
    Integer age;
    String state;
    String firstName;
    String lastName;

    public Student(Integer age, String state, String firstName, String lastName){
        this.setAge(age);
        this.setState(state);
        this.setFirstName(firstName);
        this.setLastName(lastName);
    }

    public Integer getAge(){
        return age;
    }

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

    public String getState(){
        return state;
    }

    public void setState(String state){
        this.state = state;
    }

    public String getFirstName(){
    return firstName;
    }

    public void setFirstName(String firstName){
    this.firstName = firstName;
    }

    public String getLastName(){
        return lastName;
    }

    public void setLastName(String lastName){
    this.lastName = lastName;
    }

    @Override
       public int compareTo(Object o) {
        Student nStudent = (Student)o;
           return this.getAge().compareTo(nStudent.getAge());
    }

    @Override
    public String toString(){
        return String.format("%3d %10s %s %s",this.getAge(), this.getState(),this,getFirstName(),this.getLastName());
    }

}

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