import java.util.*;

public class Explore
{  
   public static void main(String[] args)
   {
      //initializing object data
      String s1="aa";
      String s2="bb";
      String s3="cc";
      String s4="dd";
      String INVALIDSTR="ajfaworngvowrngvhaworgvnaer;igvnae;rigvnowihefowahg"
         + "owarhgaei;rgvn";
      String VALIDSTR="test2";
      
      //Instantiate four ThreeString objects
      ThreeString myObject1 = new ThreeString();
      ThreeString myObject2 = new ThreeString(s1, s2, s3);
      ThreeString myObject3 = new ThreeString();
      ThreeString myObject4 = new ThreeString(s2, s3, s4);
      
      System.out.println("=========Original objects========");
      System.out.println("Object 1: "+myObject1.toString());
      System.out.println("Object 2: "+myObject2.toString());
      System.out.println("Object 3: "+myObject3.toString());
      System.out.println("Object 4: "+myObject4.toString());
      
      //mutate one member in each object
      myObject1.setString1(s4);
      myObject2.setString2(s1);
      myObject3.setString3(s3);
      myObject4.setString1(s2);
      
      System.out.println("=========Mutated objects=========");
      System.out.println("Object 1: "+myObject1.toString());
      System.out.println("Object 2: "+myObject2.toString());
      System.out.println("Object 3: "+myObject3.toString());
      System.out.println("Object 4: "+myObject4.toString());
      
      //Mutator Tests
      System.out.println("\n=========Mutator tests==========\n");
      //Test 1, unsuccessful
      if (myObject1.setString1(INVALIDSTR))
      {
         System.out.println("TEST1: setString1 mutator call successful");
         System.out.println("myObject1.string1 is "+ myObject1.getString1());
      }
      else 
      {
         System.out.println("TEST1: setString1 mutator call unsuccessful");
         System.out.println("myObject1.string1 is "+ myObject1.getString1());
      }
      
      //Test 2, successful
      if (myObject3.setString3(VALIDSTR))
      {
         System.out.println("TEST2: setString1 mutator call successful");
         System.out.println("myObject3.string3 is "+ myObject3.getString3());
      }
      else 
      {
         System.out.println("TEST2: setString1 mutator call unsuccessful");
         System.out.println("myObject3.string3 is "+ myObject3.getString3());
      }
      
      //Accessor Tests
      System.out.println("\n=========Acessor calls==========\n");
      System.out.println("myObject1.string1 is "+ myObject1.getString1());
      System.out.println("myObject2.string2 is "+ myObject2.getString2());
   }
}
class ThreeString 
{ 
   //private members
   private String string1;
   private String string2;
   private String string3;
   
   //public constants
   public static final int LENGTH_MIN = 1;
   public static final int LENGTH_MAX = 50;
   public static final String DEFAULT_STRING = " (undefined) ";
   
   //default constructor
   ThreeString()
   {
      string1 = DEFAULT_STRING;
      string2 = DEFAULT_STRING;
      string3 = DEFAULT_STRING;
   }
   
   //constructor that takes parameters
   ThreeString(String str1, String str2, String str3)
   {
      if (validString(str1) && validString(str2) && validString(str3))
      {
         string1 = str1;
         string2 = str2;
         string3 = str3;
      }
      else
      {
         string1 = DEFAULT_STRING;
         string2 = DEFAULT_STRING;
         string3 = DEFAULT_STRING;         
      }
   }
   
   // Mutators and Accessors for all 3 private members----------------------
   public boolean setString1(String str) 
   {
      boolean status = false;
      if (validString(str))
      {
         string1 = str;
         status = true;
      }
      return status;
   }
   
   public String getString1()
   {
      return string1;
   }
   
   public boolean setString2(String str) 
   {
      boolean status = false;
      if (validString(str))
      {
         string2 = str;
         status = true;
      }
      return status;
   }
   
   public String getString2()
   {
      return string2;
   }
   
   public boolean setString3(String str) 
   {
      boolean status = false;
      if (validString(str))
      {
         string3 = str;
         status = true;
      }
      return status;
   }
   
   public String getString3()
   {
      return string3;
   }
   //------------------------------------------------------------------
   
   //method to display all member information
   public String toString() 
   {
      return string1+" "+string2+" "+string3 +"\n";
   }
   
   // private method to check if string is valid
   private boolean validString( String str ) 
   {
      if ((str.length() > LENGTH_MAX) || (str.length() < LENGTH_MIN))
      {
         return false;
      }  
      else
      {
         return true;
      }
   }
}

Explore.main(null);