AP Computer Science --- Haas --- ArrayListStudent

Objective: Use the ArrayList class

Run the following example in BlueJ, make sure you understand how it works!

public class Student {
 
  private String name;
  private int number;

  public Student(String newName, int num) {
      name = newName;
      number = num;
  }
 
  public String getName() {
      return name;
  }
  
  public String toString() {
      return name + " " + number;
  }
}  

import java.util.*;

import java.util.*;

public class ArrayListStudent {

  /**
   * prints contents of arrayList
   */
  public static void printList(ArrayList< Student > x) {
    System.out.println("");  
   
    /** rewrite using the for-each loop **/
    for (int i = 0; i < x.size(); i++) 
        System.out.print(x.get(i) + ", ");  
    System.out.println();  
   
         // old version of java 
         // System.out.println((Student)x.get(i));  
  }
  
  /**
   * creates arrayList of students
   */
  public static void main(String args[]) {
    ArrayList< Student > list1 = new ArrayList< Student >();
      // Old version of java 
      // ArrayList list1 = new ArrayList();

    Student s1 = new Student("Pat",123);
    list1.add(s1);
    list1.add(new Student("Sue",456));
    list1.add(new Student("Candy",789));
    printList(list1);  
    
    list1.add(2, new Student("Ann",121));
    printList(list1);  
    
    System.out.println(list1.get(1));  
    printList(list1);  
    
    System.out.println(list1.remove(1));  
    printList(list1);  
    
    System.out.println(list1.set(2,new Student("Alex",246)));  
    printList(list1);  
  }
}