JAVA: I have the following attributes and I am trying to get the square root of the last 4 digits of student Id without decimal places class Student{ private String studentId = "4596"; //with getters and setters public void generateId(){ Integer.parseInt(this.getStudentId()); } }   another class Test{ //main Student std1 = new Student(); std1.generateId(); //I am trying to print out the square root of the last digit of the studentId System.out.println("Square root of last four digit of studentId: " + Math.sqrt(Integer.parseInt(std1.getStudentId().substring(2))) ); }

Java  Instance data:Variable mpg for fuel efficiency (miles per gallon = mpg)Variable gas to save how many gallons of gas left in the tank Constructors:Default constructor with no parameter. Use 0 as initial values.Overloaded constructor with two parameters Methods:getMPG() & setMPG()(getGas() & setGas()toString() methoddrive() to simulate that the car is driven for certain miles. For example, v1.drive(100) means vehicle v1 is driven 100 miles. You need to calculate the gas cost and update the gas tank: gas = gas - miles/mpg. You also need to check if there is enough gas left since gas should not be negative.  You need to figure out the formal parameters for the above methods. In the testing class, prompt the user for information to create two objects of the Vehicle class. Let each vehicle drive 200 miles. Print out the left gas for each vehicle. Ex: Vehicle 1 Enter the mpg: 40 Enter the gas left: 10.5 Vehicle 2 Enter the mpg: 35 Enter the gas left: 2.1   Vehicle 1…

Complete the Course class by implementing the courseSize() method, which returns the total number of students in the course. Given classes: Class LabProgram contains the main method for testing the program. Class Course represents a course, which contains an ArrayList of Student objects as a course roster. (Type your code in here.) Class Student represents a classroom student, which has three fields: first name, last name, and GPA. Ex. For the following students: Henry Bendel 3.6 Johnny Min 2.9 the output is: Course size: 2 public class LabProgram {    public static void main (String [] args) {       Course course = new Course();            // Example students for testing      course.addStudent(new Student("Henry", "Bendel", 3.6));         course.addStudent(new Student("Johnny", "Min", 2.9));              System.out.println("Course size: " + course.courseSize());    } }   public class Student {     private String first;  // first name    private String last;   // last name    private…

Given:  public class Team {   private Player[] players;    private int squadSize;         public Team(Player[] players) {        this.players = players;        this.size = players.length;    }     public Team() {        this.players = new Player[4];         this.size = 0;     } }How would I go about creating the given methods? (Rating variable in supplied java file.)