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Java Exercises: Extract the first half of a string of even length

Java Basic: Exercise-69 with Solution

Write a Java program to extract the first half of a string of even length.

Pictorial Presentation:

Java Basic Exercises: Extract the first half of a string of even length

Sample Solution:

Java Code:

import java.lang.*;
 public class Exercise69 {
 public static void main(String[] args)
 {
    String main_string = "Python";    
    System.out.println(main_string.substring(0, main_string.length()/2));	
  } 
 }

Sample Output:

Pyt

Flowchart:

Flowchart: Java exercises: Extract the first half of a string of even length

Java Code Editor:

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Previous: Write a Java program to create a new string of 4 copies of the last 3 characters of the original string.
Next: Write a Java program to create a string in the form short_string + long_string + short_string from two strings.

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Java: Tips of the Day

countOccurrences

Counts the occurrences of a value in an array.

Use Arrays.stream().filter().count() to count total number of values that equals the specified value.

public static long countOccurrences(int[] numbers, int value) {
    return Arrays.stream(numbers)
            .filter(number -> number == value)
            .count();
}

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