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Java String Exercises: Check whether two String objects contain the same data

Java String: Exercise-13 with Solution

Write a Java program to check whether two String objects contain the same data.

Pictorial Presentation:

Java String Exercises: Check whether two String objects contain the same data

Sample Solution:

Java Code:

public class Exercise13 {

   public static void main(String[] args)
    {
        String columnist1 = "Stephen Edwin King";
        String columnist2 = "Walter Winchell";
        String columnist3 = "Mike Royko";

        // Are any of the above Strings equal to one another?
        boolean equals1 = columnist1.equals(columnist2);
        boolean equals2 = columnist1.equals(columnist3);

        // Display the results of the equality checks.
        System.out.println("\"" + columnist1 + "\" equals \"" +
            columnist2 + "\"? " + equals1);
        System.out.println("\"" + columnist1 + "\" equals \"" +
            columnist3 + "\"? " + equals2);
    }
}

Sample Output:

"Stephen Edwin King" equals "Walter Winchell"? false                                                          
"Stephen Edwin King" equals "Mike Royko"? false

Flowchart:

Flowchart: Java String  Exercises - Check whether two String objects contain the same data

Visualize Java code execution (Python Tutor):


Java Code Editor:

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Next: Write a Java program to compare a given string to another string, ignoring case considerations.

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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