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Java String Exercises: Check whether a given string starts with the contents of another string

Java String: Exercise-26 with Solution

Write a Java program to check whether a given string starts with the contents of another string.

Pictorial Presentation:

Java String Exercises: Check whether a given string starts with the contents of another string

Sample Solution:

Java Code:

public class Exercise26 {
    
   public static void main(String[] args)
    {
        String str1 = "Red is favorite color.";
        String str2 = "Orange is also my favorite color.";

        // The String to check the above two Strings to see
        // if they start with this value (Red).
        String startStr = "Red";

        // Do either of the first two Strings start with startStr?
        boolean starts1 = str1.startsWith(startStr);
        boolean starts2 = str2.startsWith(startStr);

        // Display the results of the startsWith calls.
        System.out.println( str1 + " starts with " +
             startStr + "? " + starts1);
        System.out.println(str2 + " starts with " +
             startStr + "? " + starts2);
    }
}

Sample Output:

Red is favorite color. starts with Red? true                                                                  
Orange is also my favorite color. starts with Red? false

Flowchart:

Flowchart: Java String Exercises - Check whether a given string starts with the contents of another string

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Java Code Editor:

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Previous: Write a Java program to replace each substring of a given string that matches the given regular expression with the given replacement.
Next: Write a Java program to get a substring of a given string between two specified positions.

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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