OnJava8-Examples/operators/Assignment.java

// operators/Assignment.java
// <20>2016 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://mindviewinc.com/Books/OnJava/ for more book information.
// Assignment with objects is a bit tricky.

class Tank {
  int level;
}

public class Assignment {
  public static void main(String[] args) {
    Tank t1 = new Tank();
    Tank t2 = new Tank();
    t1.level = 9;
    t2.level = 47;
    System.out.println("1: t1.level: " + t1.level +
      ", t2.level: " + t2.level);
    t1 = t2;
    System.out.println("2: t1.level: " + t1.level +
      ", t2.level: " + t2.level);
    t1.level = 27;
    System.out.println("3: t1.level: " + t1.level +
      ", t2.level: " + t2.level);
  }
}
/* Output:
1: t1.level: 9, t2.level: 47
2: t1.level: 47, t2.level: 47
3: t1.level: 27, t2.level: 27
*/