Question

Download the AllEqual.java file, and open it in jGrasp (or a text editor of your choice). This program takes a number of command line arguments, converts them to integers, and then determines if they all have the same value. An example run of the program is below, using the command-line arguments 1 2 3:

Are equal: false

A further example is shown below, with the command-line arguments 2 2:

Are equal: true

In the event that the program is given no arguments or only one argument, it should consider all the elements equal to each other.

public class AllEqual {
    // You must define the allEqual method, which will return
    // true if either:
    // 1.) The given array contains fewer than two elements, or...
    // 2.) All elements of the array are equal to each other.
    //     As a hint, you only need to compare the first element
    //     to all subsequent elements for this check.
    //
    // TODO - define your code below this comment
    //

    // DO NOT MODIFY parseStrings!
    public static int[] parseStrings(String[] strings) {
        int[] retval = new int[strings.length];
        for (int x = 0; x < strings.length; x++) {
            retval[x] = Integer.parseInt(strings[x]);
        }
        return retval;
    }

    // DO NOT MODIFY main!
    public static void main(String[] args) {
        int[] argsAsInts = parseStrings(args);
        boolean areEqual = allEqual(argsAsInts);
        System.out.println("Are equal: " + areEqual);
    }
}

Answer 1

The completed code is given below:

(*Note: Please up-vote. If any doubt, please let me know in the comments)

Full completed code:

public class AllEqual {
// You must define the allEqual method, which will return
// true if either:
// 1.) The given array contains fewer than two elements, or...
// 2.) All elements of the array are equal to each other.
// As a hint, you only need to compare the first element
// to all subsequent elements for this check.
//
// TODO - define your code below this comment
//

// DO NOT MODIFY parseStrings!
public static boolean allEqual(int[] arr){
if (arr.length<=1){
return true;
}
else{
for (int x = 1; x < arr.length; x++) {
if(arr[0] != arr[x]){
return false;
}
}
return true;
  
}
}
public static int[] parseStrings(String[] strings) {
int[] retval = new int[strings.length];
for (int x = 0; x < strings.length; x++) {
retval[x] = Integer.parseInt(strings[x]);
}
return retval;
}

// DO NOT MODIFY main!
public static void main(String[] args) {
int[] argsAsInts = parseStrings(args);
boolean areEqual = allEqual(argsAsInts);
System.out.println("Are equal: " + areEqual);
}
}

Test output screenshots: