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Java program to create a vector to store objects of a class

// Java program to create a vector to 
// store objects of a class

import java.util.*;

class Complex {
  int real;
  int imaginary;

  Complex(int r, int i) {
    this.real = r;
    this.imaginary = i;
  }

  void printComplex() {
    System.out.println("Complex Number: " + real + " + " + imaginary + "i");
  }
}

public class Main {
  public static void main(String[] args) {
    Vector < Complex > vec = new Vector < Complex > ();

    vec.add(new Complex(10, 11));
    vec.add(new Complex(20, 21));
    vec.add(new Complex(30, 31));
    vec.add(new Complex(40, 41));

    System.out.println("Vector Elements:");
    for (Complex c: vec) {
      c.printComplex();
    }
  }
}

Output

Vector Elements:
Complex Number: 10 + 11i
Complex Number: 20 + 21i
Complex Number: 30 + 31i
Complex Number: 40 + 41i