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Java String Exercises: Check whether a substring appears before a period(.) within a given string

Java String: Exercise-73 with Solution

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

Sample Solution:

Java Code:

import java.util.*;
public class Main
{
public Boolean abcBeforePeriod(String stng) 
{
  int len = stng.length();
  String abc = "abc";
  Boolean match = false;
  if (len < 3)
    return false;
  for (int i = 0; i < len - 2; i ++) 
  {
    String temp = stng.substring(i, i+3);
    if (temp.compareTo(abc) == 0 && i == 0)
      match = true;
    else if(temp.compareTo(abc) == 0 && stng.charAt(i-1) != 46)
      match = true;
  } 
  return match;
}
public static void main (String[] args)
    {
      Main m= new Main();
      String str1 =  "testabc.test";
      System.out.println("The given string is: "+str1);
      System.out.println("Is 'abc' appear before period? "+m.abcBeforePeriod(str1));
	  }
}

Sample Output:

The given strings is: testabc.test
Is 'abc' appear before period? true

The given string is: test.abctest
Is 'abc' appear before period? false

Pictorial Presentation:

Java String Exercises: Check whether a substring appears before a period(.) within a given string.

Flowchart:

Flowchart: Java String Exercises - Check whether a substring appears before a period(.) within a given string.

Java Code Editor:

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Next: Write a Java program to check whether a prefix string creates using the first specific characters in a given string, appears somewhere else in the string.

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Java: Tips of the Day

Count the number of occurrences of a char in a String:

int count = StringUtils.countMatches("a.b.c.d", ".");

Ref: https://bit.ly/2OTy6sG