Last Edit

Lab.java

+public class Lab {
+		
+	/**
+	 * Create a new lab with a given name and ID number and etc.
+	 *
+	 * @param students collection student
+	 * @param avg of student
+	 * @param day of class
+	 *  
+	 * 
+	 */
+	// collection of students
+	 private static Student[] students;
+	 private static int avg;
+	 private static String day;
+	 private static int capacity;
+	 private static int currentSize ;
+	 
+	 public Lab(int capacity, String day) {
+		 this.capacity = capacity ;
+		 students = new Student[capacity];
+		 this.day = day;
+	 }
+	 
+	 public void enrollStudent(Student std) {
+		 
+		 if (currentSize < capacity) {
+			 students[currentSize] = std;
+			 currentSize++; 
+		 } 
+		 else {
+			 System.out.println("Lab is full!!!");
+		 }
+	 }
+	 
+	 public void print() {
+		 for(int i= 0 ; i< currentSize ; i++) {
+			 System.out.println("std fname: " + students[i].getFirstName()
+					  + " std id:" + students[i].getId()
+					  + " std grade:"+ students[i].getGrade());
+		 }
+		 System.out.println("Lab AVG:" + avg);
+	 }
+	 
+	 public Student[] getStudents() {
+		 return students ;
+	 }
+	 
+	 public void setStudents(Student[] students) {
+		 if( students.length > capacity)
+			 currentSize = capacity ;
+		 else 
+			 currentSize = students.length ;
+		 
+		 this.students = students ;
+	 }
+	 
+	 public int getAvg() {
+		 return avg ;
+	 }
+	 
+	 public void calculateAvg() {
+		 int sum = 0 ;
+		 for(int i= 0 ; i< currentSize ; i++) {
+			sum += students[i].getGrade() ; 
+		 }
+		 avg = sum/currentSize ;
+	 }
+	 
+	 public String getDay() {
+		 return day ;
+	 }
+	 
+	 public void setDay(String day) {
+		 this.day = day ;
+	 }
+	 
+	 public int getCapacity() {
+		 return capacity ;
+	 }
+	 public void setCapacity(int capacity) {
+		 this.capacity = capacity ;
+	 }
+}
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Run.java

+public class Run {
+	 public static void main(String[] args) {
+		 Student std1 = new Student("Ehsan","Edalat", "9031066");
+		 Student std2 = new Student("Seyed", "Ahmadpanah", "9031806");
+		 Student std3 = new Student("Ahmad", "Asadi", "9031054");
+		 
+		 std1.print();
+		 std1.setGrade(15);
+		 std1.print();
+		
+		 std2.print();
+		 std2.setGrade(11);
+		 std2.print();
+		
+		 std3.print();
+		 std3.setFirstName("HamidReza");
+		 std3.print();
+		 
+		 
+		 Lab lab = new Lab ( 2 , "1.10.79") ;
+		 lab.enrollStudent(std1);
+		 lab.enrollStudent(std2);
+		 lab.enrollStudent(std3);
+		 lab.calculateAvg();
+		 lab.print();
+		 
+	 }
+}

Student.java

+
+/**
+* The Student class represents a student in a student administration system.
+* It holds the student details relevant in our context.
+*
+* @author Ehsan
+* @version 0.0
+*/
+
+public class Student {
+	 // the student’s first name
+	 private String firstName;
+	 // the student’s last name
+	 private String lastName;
+	 // the student ID
+	 private String id;
+	 //the grade
+	 private int grade;
+	 
+	 /**
+	  * Set a name of student.
+	  * @param sName student 
+	  */
+	 public void setFirstName(String str) {
+		 firstName = str;
+	 }
+	 
+	 /**
+	  * Set a lastName of student.
+	  * @param sLastName student 
+	  */
+	 public void setLastName(String str) {
+		 lastName = str;
+	 }
+	 
+	 /**
+	  * Set a id of student.
+	  * @param sId student 
+	  */
+	 public void setId(String str) {
+		 id = str;
+	 }
+	 
+	 /**
+	 * Print the student’s first name and last name and ID number and grade to the output terminal.
+	 * 
+	 */
+	 public void print() {
+		 System.out.println("first name is: "+ firstName + "		last name is: "+lastName + "	id is : "+ id + "	grade is: " +  grade);
+	 }
+	 
+	 /**
+	  * 
+	  * @param set the grade of student.
+	  * 
+	  */
+	 public void setGrade(int s) {
+		 grade = s ;
+	 }
+
+	 
+	 /**
+	 * get the first name of student
+	 * @return firstName field
+	 */
+	 public String getFirstName() {
+			return firstName;
+	 }
+	 
+	 /**
+	 * get the last name of student
+	 * @return lastName field
+	 */
+	 public String getLastName() {
+			return lastName;
+		 }
+	 
+	 /**
+	 * get the id of student
+	 * @return id field
+	 */
+	 public String getId() {
+			return id;
+	 }
+	 
+	 /**
+	 * get the grade of student
+	 * @return grade field
+	 */
+	 public int getGrade () {
+		 return grade ;
+	 }
+	 
+	 /**
+	 * Create a new student with a given name and ID number.
+	 *
+	 * @param fName first name of student
+	 * @param lname last name of student
+	 * @param sID student ID
+	 */
+	 public Student(String fName, String lname, String sID){
+	 firstName = fName;
+	 lastName = lname;
+	 id = sID;
+	 grade = 0;
+	 }
+}
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