Analyse the Tech Mahindra Experience Programs

-----------------------------------------------1-------------------------------------------------------
class Person{
String ss;
Person(String s)
{
ss=s;
}
}

public class TechMahindra1 {
public static void main(String[] args) {
Person p1=new Person("nag");
Person p2=new Person("nag");
if(p1.equals(p2))
System.out.println("true");
else
System.out.println("false");


}

}

--------------------------------------------------2----------------------------------------------------------

public class TechMahindra2 {
public static void main(String[] args) {

if("a".toUpperCase().equals("A"))
System.out.println("true");
else
System.out.println("false");



}

}

---------------------------------------------------------3------------------------------------------------------



public class TechMahindra3 {
String n;
public TechMahindra3(String name) {

// TODO Auto-generated constructor stub
n=name;
}
public static void main(String[] args) {
TechMahindra3 t=new TechMahindra3("nag");
System.out.println(t.toString());



}


}

-----------------------------------------------------------4-----------------------------------------------------------


import java.util.HashSet;
import java.util.TreeMap;

public class TechMahindra4 {
public static void main(String[] args) {

HashSet t=new HashSet();

for(int i=0;i<=5;i++){
t.add(i);
}

for (Object object : t) {
System.out.println(object);

}

}



}

------------------------------------------------------------5----------------------------------------------------------

import java.util.HashMap;

public class TechMahindra5 {

public static void main(String[] args) {

HashMap hm=new HashMap();

hm.put("key","nag");

hm.put("key","raj");

System.out.println(hm.get("key"));

}

}

----------------------------------------------------------------6------------------------------------------------------

public class TechMahindra6 {

public static void main(String[] args) {

Integer i=new Integer(1);

int y=1;

if(i==y)

System.out.println("true");

else

System.out.println("false");

}

}