java - Converting Program With Only A Constructor To One With A Main Method Instead -

my instructor having trouble grading assignment. created following program in bluej, , uses eclipse. problem couldn't bluej fire piece of code main method, opted use constructor instead. copy/paste of bluej code eclipse shows problematic way is:

error: not find or load main class misspelled 

how convert constructor-only program below program working main method? don't need constructor more.

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import java.util.scanner;   public class randomgame { int usersscore = 0;  public randomgame() {     scanner userinput = new scanner(system.in);      string[] wrongwords = {"mispelled","kobra", "wishfull", "adress", "changable","independant", "emberrass", "cieling", "humerous", "wierd"} ;     string[] rightwords = {"arctic", "miscellaneous", "piece", "prejudice", "grateful","ecstasy", "fascinate", "definite", "changeable", "conscious"};     double randomnumber;     int randomnumberint;     string wordtocheck;                //display rules     system.out.printf("enter either 'y' or 'n'");              //keep looping game     while(usersscore < 5)     {             //generate random number     randomnumber = generaterandomnumber();     //math.round(10 * math.random());     randomnumberint = ((int)(randomnumber));               //display user's score     system.out.printf("\n\ncurrent score: %d\n", usersscore);              //check place value of random number in array     if(randomnumber %2 == 0)     {         wordtocheck = rightwords[randomnumberint];          system.out.printf("correct?: %s\n", wordtocheck);         rightcheck(userinput.next());     }     else     {         wordtocheck = wrongwords[randomnumberint];          system.out.printf("correct?: %s\n", wordtocheck);         wrongcheck(userinput.next());     }     }     //system.out.printf(wordtocheck);    }  public double generaterandomnumber() {     double randnum;      randnum = math.round(10 * math.random());      return(randnum); }  public boolean rightcheck(string usersanswer) {     if(usersanswer.equals("y"))     {         system.out.printf("correct! rightcheck");         usersscore++;          return(true);     }     else     {         system.out.printf("incorrect rightcheck");         usersscore--;          return(false);     } }  public boolean wrongcheck(string usersanswer) {     if(usersanswer.equals("n"))     {         system.out.printf("correct! wrongcheck");         usersscore++;          return(true);     }     else     {         system.out.printf("incorrect wrongcheck");         usersscore--;          return(false);     } } } 

one way create class hold main method

public class main {     public static void main (string args[])     {         randomgame rgame = new randomgame();     } } 

(note: name of .java file must main.java in above case)

otherwise can add main() randomgame class in following way

public static void main (string args[])     {         randomgame rgame = new randomgame();     }