[noob][java] method void, int and others.

This is a noob code to practice some java code.

for use of method, even though the return type is void, it's still possible to modify the values of the object.

what are other return types for?






public class usebankaccount
{

      public static void main(String[] args)
      {
            
            bankaccount acct1 = new bankaccount();
            acct1.deposit(500);
            acct1.show();
            
            //  System.out.println ( acct1 );
            
      }
      
      
}




class bankaccount
{
      double penny;
                  
      
      public bankaccount()
      {
            System.out.println ("an account has been opened and it has 0 dollars.");
      }
      
      public bankaccount(double pennies)
      {
            double penny = pennies;
            System.out.println ("an account has been opened and it has" + penny + "dollars.");
      }
      
      public ba (double pennies)
      {
            double penny = pennies;
            System.out.println ( " An instance of the object ba has been created and " + penny + "is its balance." )
      }
            
            
      
      public void withdraw(double subtract)
      {
            penny = penny - subtract;
            System.out.println(subtract + "has been withdrew, the account still has" + penny + "dollars.");
            
      }
      
      public void deposit (double add )
      {
            penny = penny + add;
            System.out.println(add + "has been deposited, the account now has" + penny + "dollars.");
      
      }

      public void show()
      {
            System.out.println("This account has " + penny + " dollars.");
            
      }
      
      
}