PROGRAMS ON JAVA PACKAGES

PROGRAM ON PACKAGES

 FOR EXAMPLE:
    Community fixed last int a = 10;

    Secured int d;
    int x; [we are not using any accessibility specifier  it is handled as standard accessibility modifier]
    Personal int e;
  
NOTE:
1.Private accessibility specifier is also known as local accessibility specifier
2.Default accessibility specifier is also known as system accessibility specifier.
3.protected  accessibility specifier is also known as monetary gift accessibility specifier.
4.Public accessibility specifier is also known as worldwide accessibility specifier.

WRITE A JAVA PROGRAM WHICH ILLUSTRATES THE CONCEPT OF ACCESS RULES?
ANS:
      //Sbc.java
     // javac -d . sbc.java
 
     system sp
     public category Sbc
       {
             private int N_PRI=10;
             int N_DEF=20;
             protected int N_PRO=30;
             public int N_PUB=40;
             public Sbc()
              {
                 Program.out.println ("VALUE OF N_PRIVATE = "+N_pri);
                 Program.out.println ("VALUE OF N_DEFAULT ="+N_DEF);
                 Program.out.println ("VALUE OF N_PROTECTED ="+N_PRO);
                 Program.out.println ("VALUE OF N_PUBLIC ="+N_PUB);
              }
};

//Sic.java
// javac -d . sicjava

package sp;
public category Sic
{
     Sbc so=new Sbc();  //(has-a regards & within only)
     public Sic()
       {
           //System.out.println ("VALUE OF N_PRIVATE = "so.N_PRI);
          Program.out.println ("VALUE OF N_DEFAULT = "so.N_DEF);
          Program.out.println ("VALUE OF N_PROTECTED = "so.N_PRO);
          Program.out.println ("VALUE OF N_PUBLIC = "so.N_PUB);
       }
};

//Odc.java
//javac -d Odc.java

package op;
public category Odc expands sp.Sbc // (is relatoin & across)
{
     public odc()
      {
           //syatem.out.println ("VALUE OF N_PRIVATE = "+N_PRI);
             //System.out.println ("VALUE OF N_DEFAULT ="+N_DEF);
              Program.out.println ("VALUE OF N_PROTECTED ="+N_PRO);
              Program.out.println ("VALUE OF N_PUBLIC ="+N_PUB);
      }
};


//Oic.java
//javac -d Oic.java

packages op;
public category Oic
{
     sp.Sbc so = new sp.Sbc (); // (has-a regards & across)
     public Oic()
       {
            //System.out.println ("VALUE OF N_PRIVATE = "so.N_PRI);
           // Program.out.println ("VALUE OF N_DEFAULT = "so.N_DEF);
           //System.out.println ("VALUE OF N_PROTECTED = "so.N_PRO);
           Program.out.println ("VALUE OF N_PUBLIC = "so.N_PUB);
      }
};
//ASDemo.java
// java ASDemo.java

import sp.Sbc;
import sp.Sbc;
import sp.Sic;
class ASDemo
{
      public fixed gap primary (string [] args)
       {
           //import approach
           Program.out.println ("WHIT RESPECT TO SAME PACKAGE BASE CLASS");
           Sbc so1=new Sbc();
            Program.out.println ("WHIT RESPECT TO SAME PACKAGE DERIVED CLASS");
           Sbc so2=new Sbc();
           Program.out.println ("WHIT RESPECT TO SAME PACKAGE INDEPENDENT CLASS");
           Sic so3 = NEW Sic();
           //fully certified name approach
           Syatem.out.println ("WHIT RESPECT TO SAME PACKAGE DERIVED CLASS");
           op.Odc.oo1=new op.Odc();
           Program.out.println ("WHIT RESPECT TO SAME PACKAGE INDEPENDENT CLASS");
           op.Oic oo2=new op.Oic();
         }
};

NAMELESS OBJECT APPROACH:
       Sometimes there is no requirement for the JAVA developer to make a product with some name. In such scenario we can use the concept of unidentified object.

FOR EXAMPLE:
          //named object approach
          Check t1= new Check ();
          t1.display ();
  To turn the above claims into unidentified object strategy adhere to the following claims.
FOR EXAMPLE:
     //nameless object strategy
     new Check ().display ();