Java - Day 46 (in Telugu) - Complex Objects

/* HasARelation.java */
class School{
ClassRoom c1,c2,c3,c4,c5,c6;
PlayGround pg;
OfficeRoom off;
}
class ClassRoom{
int cap,bType;
}
class PlayGround{
int len,bre;
boolean hasGrass;
}
class OfficeRoom{
int staffCount;
}
class HasARelation{
public static void main(String arg[]){
School s;
s = new School();
s.pg = new PlayGround();
s.off = new OfficeRoom();
s.c1 = new ClassRoom();
s.c2 = new ClassRoom();
s.c4 = new ClassRoom();
s.c5 = new ClassRoom();

System.out.println("Hashcodes...");
System.out.println(s); //
System.out.println(s.c1);
System.out.println(s.c2);
System.out.println(s.c3); // null
System.out.println(s.c4);
System.out.println(s.c5);
System.out.println(s.c6); // null
System.out.println(s.pg);
System.out.println(s.off);

System.out.println("\nValues...");
System.out.println(s.pg.hasGrass); // false
System.out.println(s.off.staffCount); // 0
System.out.println(s.c1.cap); // 0
System.out.println(s.c1.bType); // 0
System.out.println(s.c4.cap); // 0
System.out.println(s.c5.bType); // 0

s.c1.cap = 30;
s.c1.bType = 1;
s.c2.cap = 40;
s.c2.bType = 2;
//s.c3.cap = 50;
//s.c3.bType = 1;
s.c4.cap = 35;
s.c4.bType = 1;
s.c5.cap = 45;
s.c5.bType = 2;
s.pg.len = 200;
s.pg.bre = 150;
s.pg.hasGrass = true;
s.off.staffCount = 20;

System.out.println("\nUpdated Values...");
System.out.println(s.pg.hasGrass); // true
System.out.println(s.off.staffCount); // 20
System.out.println(s.c1.cap); // 30
System.out.println(s.c1.bType); // 1
System.out.println(s.c4.cap); // 35
System.out.println(s.c5.bType); // 2
}
}