//test if assigning from existing to new class is by reference or by value
public class test{
   public static void main(String[] args){
      Example t1 = new Example(1);
      Example t2 = new Example(3);
      t2 = t1;
      t1.printT();
      t2.setT(2);
      t1.printT();
      t2.printT();
   }
}
class Example{
   int t;
   
   public Example(int t){
      this.t = t;
   }
   
   public void printT(){
      System.out.println(this.t);
   }
   
   public void setT(int t){
      this.t = t;
   }
}