The following steps to create program of Login successful :
Step 1. import the ArrayList class inside the current class;
import java.util.ArrayList;
step 2. create object of the ArrayList class inside the current class
ArrayList mylist = new ArrayList();
step 3. add all the object on the list.
mylist.add("Aman");
mylist.add("raju");
mylist.add("amit");
mylist.add("chaitanya");
mylist.add("simran");
mylist.add("Admin");
mylist.add("ravish");
step 4. create an validate or check method to find the admin in current list of arraylist type.
private static boolean check(ArrayList mylist2, int i)
{
if(mylist2.get(i)=="Admin")
{
return true;
}
else
{
return false;
}
}
step 5. create a Boolean type datatype to check on the future flag value, to validate the user present inside the list.
boolean flag=false;
step 6. check each index of list by using arraylist index and for loop.
for(int i=0; i<mylist.size(); i++)
{
if(check(mylist,i)==true)
{
flag=true;
}
}
step 7. if flag value is true or false. It will provide exact and correct output on console.
if(flag==true)
{
System.out.println("Login Successful");
}
else
{
System.out.println("you have forget username!");
}
Full Program code of login successful:
import java.util.ArrayList;
class Details
{
public static void main(String a[])
{
ArrayList mylist = new ArrayList();
mylist.add("Aman");
mylist.add("raju");
mylist.add("amit");
mylist.add("chaitanya");
mylist.add("simran");
mylist.add("Admin");
mylist.add("ravish");
boolean flag=false;
for(int i=0; i<mylist.size(); i++)
{
if(check(mylist,i)==true)
{
flag=true;
}
}
if(flag==true)
{
System.out.println("Login Successful");
}
else
{
System.out.println("you have forget username!");
}
}
private static boolean check(ArrayList mylist2, int i)
{
if(mylist2.get(i)=="Admin")
{
return true;
}
else
{
return false;
}
}
}