Java Exercises: Find the missing string from two specified strings

Java Basic: Exercise-190 with Solution

Write a Java program to find the missing string from two given strings.

Pictorial Presentation:

Java Basic Exercises: Find the missing string from two specified strings

Sample Solution:

Java Code:

import java.util.*;
public class Solution {
 public static void main(String[] args) {
  String str1 = "Java Programming Exercises, Practice, Solution";
  String str2 = "Java Programming Exercises, Practice,";
  System.out.println("Missing string: " + Arrays.toString(missing_Words(str1, str2)));

 public static String[] missing_Words(String t, String s) {

  String[] s1 = t.split(" ");
  String[] s2 = s.split(" ");
  int sz = s1.length - s2.length;
  String[] missing_str = new String[sz];
  int c = 0;
  for (int i = 0; i < s1.length; i++) {
   int flag = 0;
   for (int j = 0; j < s2.length; j++) {
    if (s1[i].equals(s2[j]))
     flag = 1;
   if (flag == 0) {
    missing_str[c++] = s1[i];
  return missing_str;

Sample Output:

Missing string: [Solution]


Flowchart: Java exercises: Find the missing string from two specified strings

Java Code Editor:

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Next: Write a Java program to test whether there are two integers x and y such that x^2 + y^2 is equal to a given positive number.

What is the difficulty level of this exercise?

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