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Java Exercises: Create a new array of length 2 from two arrays of integers with three elements and the new array will contain the first and last elements from the two arrays

Java Basic: Exercise-77 with Solution

Write a Java program to create a new array of length 2 from two arrays of integers with three elements and the new array will contain the first and last elements from the two arrays.

Sample Solution:

Java Code:

import java.util.Arrays; 
 public class Exercise77 {
 public static void main(String[] args)
 {
    int[] array1 = {50, -20, 0};
	int[] array2 = {5, -50, 10};
	System.out.println("Array1: "+Arrays.toString(array1)); 
	System.out.println("Array2: "+Arrays.toString(array2)); 
    int[] array_new = {array1[0], array2[2]};	
	System.out.println("New Array: "+Arrays.toString(array_new)); 	 
 }
}

Sample Output:

Array1: [50, -20, 0]                                                   
Array2: [5, -50, 10]                                                   
New Array: [50, 10]

Pictorial Presentation:

Java exercises: Create a new array of length 2 from two arrays of integers with three elements and the new array will contain the first and last elements from the two arrays

Flowchart:

Flowchart: Java exercises: Create a new array of length 2 from two arrays of integers with three elements and the new array will contain the first and last elements from the two arrays

Java Code Editor:

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Next: Write a Java program to test that a given array of integers of length 2 contains a 4 or a 7.

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Java: Tips of the Day

Try and catch:

Java is excellent at catching errors, but it can only recover gracefully if you tell it what to do. The cascading hierarchy of attempting to perform an action in Java starts with try, falls back to catch, and ends with finally. Should the try clause fail, then catch is invoked, and in the end, there's always finally to perform some sensible action regardless of the results. Here's an example:

try {
        cmd = parser.parse(opt, args); 
       
        if(cmd.hasOption("help")) {
                HelpFormatter helper = new HelpFormatter();
                helper.printHelp("Hello ", opt);
                System.exit(0);
                }
        else {
                if(cmd.hasOption("shell") || cmd.hasOption("s")) {
                String target = cmd.getOptionValue("tgt");
                } // else
        } // fi
} catch (ParseException err) {
        System.out.println(err);
        System.exit(1);
        } //catch
        finally {
                new Hello().helloWorld(opt);
        } //finally
} //try

It's a robust system that attempts to avoid irrecoverable errors or, at least, to provide you with the option to give useful feedback to the user. Use it often, and your users will thank you!

Ref: https://red.ht/3EZc9OC