Java - Outer & Inner & 객체공유

class Outer{
 public Outer(){}
 private int x = 100; // private 써보기
 private static int y = 200;
 public void setx(int x)
 {
  this.x = x;
 }
 public void disp(){
  System.out.println("x="+x);
  System.out.println("y="+y);
 }
 class Inner{
  public Inner(){}  
  public void disp_in(){
   System.out.println("x="+x);
 
  }
 }
}

public class ex_01 {
 public static void main(String[] arg) {
  // ot
  Outer ot = new Outer();
  ot.setx(200);
  Outer.Inner in = ot.new Inner();
  in.disp_in();
  // ot1
  Outer ot1 = new Outer();
  ot1.setx(300);
  Outer.Inner in1 = ot1.new Inner();
  in1.disp_in();
  Outer.Inner in2 = ot1.new Inner();
  in2.disp_in();
 }
}