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Java String Exercises: Add a string with specific number of times separated by a substring

Java String: Exercise-77 with Solution

Write a Java program to add a string with specific number of times separated by a substring.

Sample Solution:

Java Code:

import java.util.*;
public class Main
{
public String addBySeparator(String main_str, String sep_str, int ctr) 
{
  String new_word = "";
  for (int i = 0; i < ctr; i++) 
  {
    if (i < ctr-1)
      new_word += main_str + sep_str;
    else
      new_word += main_str;
  }
  return new_word;
}
public static void main (String[] args)
    {
      Main m= new Main();
      String str1 =  "try";
      String str2 =  "best";
	  int ctr=3;
	  
      System.out.println("The given strings are: "+str1+"  and  "+str2);
	  System.out.println("Number to times to be repeat: "+ctr);
      System.out.println("The new string is: "+m.addBySeparator(str1,str2,ctr));
	  }
}

Sample Output:

The given strings are: try  and  best
Number to times to be repeat: 3
The new string is: trybesttrybesttry

Pictorial Presentation:

Java String Exercises: Add a string with specific number of times separated by a substring.

Flowchart:

Flowchart: Java String Exercises - Add a string with specific number of times separated by a substring.

Java Code Editor:

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Previous: Write a Java program to count how many times the substring 'life' present at anywhere in a given string. Counting can also happen for the substring 'li?e',any character instead of 'f'.
Next: Write a Java program to repeat a specific number of characters for specific number of times from the last part of a given string.

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Java: Tips of the Day

Array vs ArrayLists:

The main difference between these two is that an Array is of fixed size so once you have created an Array you cannot change it but the ArrayList is not of fixed size. You can create instances of ArrayLists without specifying its size. So if you create such instances of an ArrayList without specifying its size Java will create an instance of an ArrayList of default size.

Once an ArrayList is full it re-sizes itself. In fact, an ArrayList is internally supported by an array. So when an ArrayList is resized it will slow down its performance a bit as the contents of the old Array must be copied to a new Array.

At the same time, it's compulsory to specify the size of an Array directly or indirectly while creating it. And also Arrays can store both primitives and objects while ArrayLists only can store objects.

Ref: https://bit.ly/3o8L2KH