w3resource

Java Exercises: Test if the first or the last elements of two arrays of integers are same

Java Basic: Exercise-76 with Solution

Write a Java program to test if the first or the last elements of two arrays of integers are same. The length of the two arrays must be greater than or equal to 2.

Sample Solution:

Java Code:

public class Main {
 public static void main(String[] args)
 {
  //false
  int[] num_array1 = {50, -20, 0, 30, 40, 60, 12};
	int[] num_array2 = {45, 20, 10, 20, 30, 50, 11};
	
	//true
	//int[] num_array1 = {50, -20, 0, 30, 40, 60, 12};
	//int[] num_array2 = {45, 20, 10, 20, 30, 50, 12};
	
	//Array lengths less than 2.
	//int[] num_array1 = {50};
	//int[] num_array2 = {45};
	
  if(num_array1.length>=2 && num_array2.length>=2)
  {
	  System.out.println(num_array1[0] == num_array2[0] || num_array1[num_array1.length-1] == num_array2[num_array2.length-1]);
  }
  else
  {
   System.out.println("Array lengths less than 2.");
  }
 }
}

Sample Output:

false

Pictorial Presentation:

Java exercises: Test if the first or the last elements of two arrays of integers are same
Java exercises: Test if the first or the last elements of two arrays of integers are same

Flowchart:

Flowchart: Java exercises: Test if the first or the last elements of two arrays of integers are same

Java Code Editor:

Contribute your code and comments through Disqus.

Previous: Write a Java program to test if the first and the last element of an array of integers are same.
Next: 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.

What is the difficulty level of this exercise?



Java: Tips of the Day

Execution of console commands:

Java allows you to execute console commands directly from code using a class Runtime. It is very important not to forget about exception handling.

For example, let's try to open a PDF file through a Java terminal:

import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
  
public class ShellCommandExec {
  
  public static void main(String[] args) {
    String gnomeOpenCommand = "gnome-open //home//user//Documents//MyDoc.pdf";
  
    try {
      Runtime rt = Runtime.getRuntime();
      Process processObj = rt.exec(gnomeOpenCommand);
  
      InputStream stdin = processObj.getErrorStream();
      InputStreamReader isr = new InputStreamReader(stdin);
      BufferedReader br = new BufferedReader(isr);
  
      String myoutput = "";
  
      while ((myoutput=br.readLine()) != null) {
        myoutput = myoutput+"\n";
      }
      System.out.println(myoutput);
    }
    catch (Exception e) {
      e.printStackTrace();
    }
  }
}