Access Modifiers

There are two packages !

1. first ( 11 .java files , file names must be same as class name )

2. second ( 9 .java files , file names must be same as class name)

Program

M.imp //Find Compiletion Error / Compiletion Successfully / Output ? check for each class

* Package first .java files ? 
//1 must save as A.java 
package first;
class A
{
 int i;
}



//2 must save as B.java
package first;
class B
{
 public static void main(String[] args)
 {
  A a1 = new A();
  System.out.println(a1.i);
  
 }
}



//3 must save as C.java
package first;
class C extends A
{
 public static void main(String[] args)
 {
  C c1 = new C();
  System.out.println(c1.i);
  
 }
}



//4 must save as D.java
package first;
class D extends C
{
 public static void main(String[] args)
 {
  D d1 = new D();
  System.out.println(d1.i);
  
 }
}



//5 must save as E.java
package first;
class E
{
 public static void main(String[] args)
 {
  A a1 = new A();
  System.out.println(a1.i);
  C c1 = new C();
  System.out.println(c1.i);
  D d1 = new D();
  System.out.println(d1.i);
 }
}


//6 must save as F.java
package first;
class F
{
 void test1()
 {
  System.out.println("test1");
 }
}



//7 must save as G.java
package first;
class G
{
 public static void main(String[] args)
 {
  F f1 = new F();
  f1.test1();
  System.out.println("Done");
 }
}



//8 must save as H.java
package first;
class H extends F
{
 public static void main(String[] args)
 {
  H h1 = new H();
  h1.test1();
  System.out.println("Hello World");
 }
}



//9 must save as I.java
package first;
class I extends H
{
 public static void main(String[] args)
 {
  I i1 = new I();
  i1.test1();
  System.out.println("Hello World!");
 }
}



//10 must save as J.java
package first;
class J
{
 public static void main(String[] args)
 {
  F f1 = new F();
  f1.test1();
  System.out.println("------");
  H h1 = new H();
  h1.test1();
  System.out.println("------");
  I i1 = new I();
  i1.test1();
  System.out.println("-------");
 }
}


//11 must save as N.java
package first;
public class N
{
 int i;
}


* Package Second .java files ? 
//1 must save as K.java
package second;
class K
{
 public static void main(String[] args)
 {
  A a1 = new A();
  System.out.println(a1.i);
 }
}



//2 must save as L.java
package second;
class L
{
 public static void main(String[] args)
 {
  first.A a1 = new first.A();
  System.out.println(a1.i);
 }
}



//3 must save as M.java
package second;
class M
{
 public static void main(String[] args)
 {
  first.F f1 = new first.F();
  f1.test();
  System.out.println("Hello");
 }
}



//4 must save as O.java
package second;
class O
{
 public static void main(String[] args)
 {
  first.N n1 = new first.N();
  System.out.println(n1.i);
 }
}



//5 must save as P.java
package second;
class P extends first.N 
{
 public static void main(String[] args)
 {
  P p1 = new P();
  System.out.println("...");
 }
}



//6 must save as Q.java
package second;
class Q 
{
 public static void main(String[] args)
 {
  N n1 = new N();
  System.out.println(done);
 }
}


//7 must save as R.java
package second;
class R 
{
 public static void main(String[] args)
 {
  first.N n1 = new first.N();
  System.out.println("done");
 }
}



//8 must save as S.java
package second;
import first.N;
class S 
{
 public static void main(String[] args)
 {
  N n1 = new N();
  System.out.println("done");
 }
}



//9 must save as T.java
package second;
class T extends first.N
{
 public static void main(String[] args)
 {
  first.N n1 = new first.N();
  first.N n2 = new first.N();
  first.N n3 = new first.N();
  System.out.println("done");
 }
}

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