Write a Java program to check whether a substring(abc) appears before a period(.) within a given string

Sure, here is a simple Java program that checks if a substring "abc" appears before a period "." in a given string.

public class Main {
    public static void main(String[] args) {
        String str = "This is a test string abc. Let's see if it works.";
        System.out.println(checkSubstringBeforePeriod(str));
    }

    public static boolean checkSubstringBeforePeriod(String str) {
        int indexABC = str.indexOf("abc");
        int indexPeriod = str.indexOf(".");
        
        if (indexABC != -1 && indexPeriod != -1 && indexABC < indexPeriod) {
            return true;
        } else {
            return false;
        }
    }
}

In this program, we have a function checkSubstringBeforePeriod that takes a string as input. It finds the index of the substring "abc" and the index of the period "." in the string using the indexOf method. If both "abc" and "." are present in the string and "abc" appears before ".", the function returns true. Otherwise, it returns false.

The main method is where the program starts. It defines a test string and calls the checkSubstringBeforePeriod function with the test string as argument. The result is then printed to the console.

Sure, here is a simple Java program that checks if the substring

Sure, here is a simple Java program that checks if a substring "abc" appears before a period "." in a given string.

public class Main {
    public static void main(String[] args) {
        String str = "abc.def";
        System.out.println(checkSubstringBeforePeriod(str));
    }

    public static boolean checkSubstringBeforePeriod(String str) {
        int indexABC = str.indexOf("abc");
        int indexPeriod = str.indexOf(".");
        if (indexABC != -1 && indexPeriod != -1 && indexABC < indexPeriod) {
            return true;
        } else {
            return false;
        }
    }
}

In this program, we have a function checkSubstringBeforePeriod that takes a string as input. It finds the index of the substring "abc" and the index of the period "." in the string using the indexOf method. If both "abc" and "." are present in the string and "abc" appears before ".", the function returns true. Otherwise, it returns false.

The main method is the entry point of the program. It defines a string and calls the checkSubstringBeforePeriod function with this string, then prints the result.

Sure, here is a simple Java program that checks if a substring "abc" appears before a period "." in a given string.

public class Main {
    public static void main(String[] args) {
        String str = "This is a test string abc. This is another test string.";
        System.out.println(checkSubstringBeforePeriod(str, "abc"));
    }

    public static boolean checkSubstringBeforePeriod(String str, String substring) {
        int indexSubstring = str.indexOf(substring);
        int indexPeriod = str.indexOf(".");
        
        if (indexSubstring == -1 || indexPeriod == -1) {
            return false;
        } else {
            return indexSubstring < indexPeriod;
        }
    }
}

In this program, we have a function checkSubstringBeforePeriod that takes a string and a substring as input. It finds the index of the substring and the period in the string using the indexOf method. If either the substring or the period is not found (i.e., indexOf returns -1), the function returns false. Otherwise, it checks if the index of the substring is less than the index of the period, which means the substring appears before the period. If so, it returns true; otherwise, it returns false.

The main method tests this function with a sample string and the substring "abc".