B8 Day 28Value Checking

package mattroseb8wk5;
import java.util.Scanner;

// testing insert filter
public class Day28A {
    public static void main(String[] args) {
        Day28A callMethods = new Day28A();
        Scanner sc = new Scanner(System.in);
        String txt1 = "";
        double num1 = 0;
        int num2 = 0;

        String userInput;
        boolean isValid = true;

        System.out.print("Enter text: ");
        userInput = sc.nextLine();
        if (callMethods.checkString(userInput)) {
            txt1 = userInput;
        } else {
            isValid = false;
        }
        userInput = "";

        System.out.print("Enter decimal number: ");
        userInput = sc.nextLine();
        if (callMethods.checkDouble(userInput)) {
            num1 = Double.parseDouble(userInput);
        } else {
            isValid = false;
        }
        userInput = "";

        System.out.print("Enter whole number: ");
        userInput = sc.nextLine();
        if (callMethods.checkString(userInput)) {
            num2 = Integer.parseInt(userInput);
        } else {
            isValid = false;
        }
        userInput = "";
        if (isValid) {
            System.out.println("String: " + txt1);
            System.out.println("Double: " + num1);
            System.out.println("Integer: " + num2);
        } else {
            System.out.println("One of the user input is invalid");
        }
    }

    public boolean checkString(String newValue) {
        boolean isValid = true;
        String resStr = newValue;
        if (newValue.trim().isEmpty()) {
            isValid = false;
        }
        return isValid;
    }

    public boolean checkDouble(String newValue) {
        boolean isValid = true;
        double resDbl = 0.0;
        try {
            resDbl = Double.parseDouble(newValue);
        } catch (Exception e) {
            isValid = false;
        }
        return isValid;
    }

    public boolean checkInt(String newValue) {
        boolean isValid = true;
        int resInt = 0;
        try {
            resInt = Integer.parseInt(newValue);
        } catch (Exception e) {
            isValid = false;
        }
        return isValid;
    }
}