Question

Debugging exercise

Programmer Began programming the following program, but made some mistakes.

Please debug:

class Student{

    private int id;

    private String name;

    private String city;

      Student(String name, String city){

        this.name = name;

        this.city = city;

    }

       Student(int id, String place){

        this.id = id;

        this.place =name;

    }

       void Student(int id, String name, String city){

        this.id = id;

        this.name = name;

        this.city = city;

    }

    protected void print(){

                       If (city.equals(null))

                       {

                        System.out.println(id + “ “ + name);

                       }

                      Else if (id == 0)

                     {

        System.out.println(id " " + name +

            " " + city);

    }

          Else if

}

Programmer Began programming the following program, but made some mistakes.

Please debug.

public class ThisDemo {

   public static void main(String[] args) {

      

       Student malestudent = new Student(111,"John");

       Student femalestudent = new Student(321,Mary, "Oakland");

       Student noID = new Student("Steve","Orinda");

       maleStudent.print();

       femaleStudent.print();

       noID.print();

   }

   

}

in Java

Answer 1

class Student {

private int id;

private String name;

private String city;

Student(String name, String city) {

this.name = name;

this.city = city;

}

Student(int id, String place) {

this.id = id;

this.name = place;

}

Student(int id, String name, String city) {

this.id = id;

this.name = name;

this.city = city;

}

protected void print() {

if (city == null)

{

System.out.println(id + " " + name);

}

else if (id == 0)

{

System.out.println( name +

" " + city);

}else {

System.out.println( id +

" " + city);

}

}

}

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public class ThisDemo {

   public static void main(String[] args) {

  

   Student malestudent = new Student(111,"John");

   Student femalestudent = new Student(321, "MaryOakland");

   Student noID = new Student("Steve","Orinda");

   malestudent.print();

   femalestudent.print();

   noID.print();

   }

}
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See Output



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