Answer:
public class Lab10
{
//Constants
private final static String NAME = "John Terry"; // replace YOUR NAME with your name
private final static int STUID = 123456789;
private final static double GPA1 = 4.00;
private final static double GPA2 = 2.34;
//main method
public static void main (String[] args)
{
Student stu1;
stu1 = new Student(NAME, STUID, GPA1);
System.out.println("\nName: " + stu1.getName());
System.out.println("Id Number: " + stu1.getIdNum());
System.out.println("GPA : " + stu1.getGPA());
stu1.setGPA(GPA2);
System.out.println(stu1 + "\n");
// Create a second student object
// With a name of Trine Thunder, a
// gpa of 4.00, and a student Id of
// 000000001
// You do not need to declare these at final constants,
// but you can if you want to.
System.out.println("\nName: Trine Thunder" );
System.out.println("Id Number: 000000001");
System.out.println("GPA : 4.00");
Student stu2 = new Student("Trine Thunder",000000001, 4.00 );
// [Add code here]
// Print out this student similar to above.
// You do not need to reset the gpa of this student.
System.out.println(stu2 + "\n");
// [Add code here]
// Check if both objects are same using == and .equals() methods.
// Print the message in both cases, whether same or not as shown in sample output.
System.out.println("Using ==");
if(stu1 == stu2){
System.out.println("Both are same");
}
else{
System.out.println("Both are different");
}
stu1.equals(stu2);
// [Add code here]
} // end of main
} // end of class Lab10
// Name:
// Section:
// Lab 10
// CS1113
// Fall 2016
// Class : Student.java
public class Student
{
//class variables
private String name;
private int idNum;
private double gpa;
// Constructor
public Student(String namePar, int idNumPar, double gpaPar)
{
// Save namePar to class variable name
name = namePar;
// [Add code here]
idNum = idNumPar;
// Save idNumPar to class variable idNum
gpa = gpaPar ;
// [Add code here]
// Save gpaPar to class variable gpa
// [Add code here]
}
// Accessor: returns name of student
public String getName()
{
// Return the name of the student
return name;
// [Add code here]
}
// Accessor: returns GPA of student
public double getGPA()
{
// Return the gpa of the student
return gpa;
// [Add code here]
}
// Accessor: returns idNum of student
public int getIdNum()
{
// Return the idnum of the Student
return idNum;
// [Add code here]
}
// Mutator: Changes the GPA of the student
public void setGPA(double g)
{
// Set the class variable gpa equal to g
gpa = g;
// [Add code here]
}
// toString method: Returns a formatted string
// of student information.
// As shown in sample output.
public String toString()
{
// declare a String variable to store the string value
// then return the formatted String.
String s ="";
s = s + "Student Name: "+name+"\n";
s =s + "Student Id num: "+idNum+"\n";
s =s + "Student GPA: "+gpa+"\n";
return s;
// [Add code here]
}
// implement .equals() method which returns a boolean value
// of student information. When you call this method,
// it should print message as shown in sample output.
public boolean equals(Student s)
{
//[Add code here]
System.out.println("Using .equals() method");
if(this.equals(s.idNum == this.idNum)){
System.out.println("Both are same");
return true;
}
else{
System.out.println("Both are different");
return false;
}
}
} // end of class Student
Explanation:
Output:
Name: John Terry
Id Number: 123456789
GPA : 4.0
Student Name: John Terry
Student Id num: 123456789
Student GPA: 2.34
Name: Trine Thunder
Id Number: 000000001
GPA : 4.00
Student Name: Trine Thunder
Student Id num: 1
Student GPA: 4.0
Using ==
Both are different
Using .equals() method
Both are different
