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POCannot make a static reference to the non-static method. How would I fix this
 

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  1. POCannot make a static reference to the non-static method. How would I fix this
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    <p>My code keeps getting this error Error: Cannot make a static reference to the non-static method InputMenu() or display_Menu() from the type RationalDriver. I called the method and even tried making them static which doesn't help. How would I fix this for this code. I'm new at this so please explain it or show me clearly how I would do it. Thank you</p> <pre><code> import java.util.Scanner; import java.lang.String; public class RationalDriver{ public static int rationalNum1, rationalDen1, rationalNum2, rationalDen2; public static Rational r1, r2; public static void main(String[] args){ Scanner in = new Scanner(System.in); // first rational System.out.println(" Input first rational number for the Numerator"); rationalNum1 = in.nextInt(); System.out.println(" Input first rational number for the Denominator"); rationalDen1 = in.nextInt(); if (rationalDen1 == 0){ System.out.println(" Cannont divide by zero "); System.out.println(" please re enter another number "); } System.out.println("Rational Number #1 = ("+rationalNum1+"/"+rationalDen1+")"); //Displays 1st Rational Number // second rational System.out.println(" Input 2nd rational number for the 2nd Numerator"); rationalNum2 = in.nextInt(); System.out.println(" Input 2nd rational number for the 2nd Denominator"); rationalDen2 = in.nextInt(); if (rationalDen2 == 0){ System.out.println("Cannont divide by zero"); System.out.println(" please re enter another number"); } System.out.println("Rational Number #2 = ("+rationalNum2+"/"+rationalDen2+")"); /// /Displays 2nd Rational Number r1 = new Rational ( rationalNum1, rationalDen1); r2 = new Rational ( rationalNum2, rationalDen2); display_menu(); InputMenu() ; } // System.out.println;//toString public void display_menu() //menu options { System.out.print(" Enter the corresponding number for the desired action "); System.out.println("1) Addition\n2) 2) Subtraction\n3) 3) Multiplication\n4) 4)Division\n5) 5) Test for Eqaulity\n6) 6) Change 1st rational number\n7) 7) Change 2nd rational number"); } public void question() { System.out.println("Do you want to exit? [y/n]"); // ask user if they want to quit with yes or no option Scanner q = new Scanner(System.in); switch (q.nextInt()) { case 'y' : System.out.println ("Thank you and goodbye."); break; case 'n' : InputMenu(); break; default: System.err.println ( "Unrecognized option" ); break; } } public void InputMenu() // keys for the menu { Scanner in = new Scanner(System.in); display_menu(); int temp = in.nextInt(); switch (temp) { case 1: //addition System.out.println ( "1" ); System.out.println( "(" +rationalNum1+ "/" +rationalDen1+ ") + (" +rationalNum2+ "/" +rationalDen2+ ") = " +r1.add(r2)); break; case 2: //subtraction System.out.println ( "2" ); System.out.println( "("+rationalNum1+"/"+rationalDen1+")"+ " - " + "("+rationalNum2+"/"+rationalDen2+")" + "=" + r1.subtract(r2)); break; case 3: //mulitplication System.out.println ( "3" ); System.out.println( "("+rationalNum1+"/"+rationalDen1+")"+ " * " + "("+rationalNum2+"/"+rationalDen2+")" + "=" + r1.multiply(r2)); break; case 4: //division System.out.println ( "4" ); System.out.println( "("+rationalNum1+"/"+rationalDen1+")"+ " / " + "("+rationalNum2+"/"+rationalDen2+")" + "=" + r1.divide(r2)); break; case 5: //compare to System.out.println ( "5" ); // question(); break; case 6: //change the 1st Rational Number System.out.println ( "6" ); System.out.println(" Input first rational number for the Numerator"); rationalNum1 = in.nextInt(); System.out.println(" Input first rational number for the Denominator"); rationalDen1 = in.nextInt(); if (rationalDen1 == 0){ System.out.println(" Cannont divide by zero"); System.out.println(" please re enter another number"); } break; case 7: //change the 2nd Rational Number System.out.println ( "7" ); System.out.println(" Input 2nd rational number for the 2nd Numerator"); rationalNum2 = in.nextInt(); System.out.println(" Input 2nd rational number for the 2nd Denominator"); rationalDen2 = in.nextInt(); if (rationalDen2 == 0){ System.out.println("Cannont divide by zero"); System.out.println(" please re enter another number"); break; } default: System.out.println ( "Unrecognized option" ); break; } } </code></pre> <p>}</p>
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    1. USuser2921727
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      1. POCannot make a static reference to the non-static method. How would I fix this
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    1. COYou need to understand what `static` means.
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      1. POCannot make a static reference to the non-static method. How would I fix this
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    2. COAnd what "non-static" means. And what an object is.
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      1. USHot Licks
    3. CO@HotLicks Got it thanks
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      1. POCannot make a static reference to the non-static method. How would I fix this
      1. USuser2921727
 

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