CODEWITHSUNDEEP
javaarrays
Zinedin
Zinedin

Reputation: 13

Create a function that prints out the number of positive integers parsed in args

I'm having problems executing this program in which I have to enable Java to return the amount of Positive numbers in an array of integers already typed in the line of command.

public class A1Q1 {

    private static int countPositive(int[] array) {

        int positive = 0;
        for (int i = 0; i < array.length; i++) {
            if (array[i] > 0) {
                positive = positive + 1;
            }
            System.out.println(positive);
        }
        return positive;
    }

    public static void main(String args[]) {
        int[] array = new int[]{5, 6, 7, 45, -2, -9};
        int count = countPositive(array);
        System.out.println(count);
    }
}

Upvotes: 0

Views: 243

Answers (2)

Gopinath Langote
Gopinath Langote

Reputation: 311

Java 7 or before:

private static int countPositive(int[] array) {
    int positive = 0;
    for (int i = 0; i < array.length; i++) {
        if (array[i] > 0) {
            positive = positive + 1;
        }
    }
    return positive;
}

Java 8 version:

private static int countPositive(int[] array) {
    return (int) Arrays.stream(array).filter(number -> number > 0).count();
}

No changes in main method.

Upvotes: 0

Youcef LAIDANI
Youcef LAIDANI

Reputation: 59968

Your program have many problem try this code :

private static int countPositive(int[] array) {

    int positive = 0;
    for (int i = 0; i < array.length; i++) {
        if (array[i] > 0) { //should be greater than 0  
            positive++;
        }
    }
    return positive;
}

public static void main(String args[]) {
    int[] array = new int[]{5, 6, 7, 45, -2, -9};
    int count = countPositive(array);
    System.out.println(count);
}

First

If you are in the same class you don't need to instantiate it again

like this you do here:

public static void main(String args[]) {
        A1Q1 nt = new A1Q1();

Second

You should use the same name of method in your loop:

 //-----------------------------------this name--
 private static int countPositive(int[] array) {

        for (int i = 0; i < array.length; i++) {

You can start java here:

Getting started

And about array :

Arrays

Upvotes: 2

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