Java SE Static Inner

/*ÄÚ²¿ÀàʹÓÃʾÀý*/
package demo;
class Outer{
 int outer_i=100;
 static int outer_j=200;
 final int outer_k=300;
 void test(){
  Inner in = new Inner();
  in.display();
 }
 static class Inner{
  void display(){
   System.out.println("display: outer_j = "+/*outer_i*/outer_j);
//   System.out.println("display: outer_k = "+outer_k); //´íÎóÓï¾ä£¬ÔÚ¾²Ì¬ÀàÖв»ÄÜʹÓ÷Ǿ²Ì¬±äÁ¿
  }
 }
}
class InnerClassDemo {
 /**
  * @param args
  */
 public static void main(String[] args) {
  Outer outer=new Outer();
  outer.test();
 }
}
/*Êä³ö½á¹û
display: outer_j = 200
*/
/*ÄÚ²¿ÀàʹÓÃ*/
package demo;
class Outer1{
 private int size=10;
 protected class Inner{
  public void doStuff(){
   System.out.println(++size);
  }
 }
}
public class TestInner {
 public static void main(String[] args) {
  Outer1 outer1=new Outer1();
  Outer1.Inner i=outer1.new Inner();
  i.doStuff();
 }
}