Question

I am just starting to use Java. I am using NetBeans and inside my .pkg1 file I have two .java files. I am doing the Coursera course on Algorithms by the way, so my code references that:

CourseraAlgorithmsWeek1.java

package coursera.algorithms.week.pkg1;

public class CourseraAlgorithmsWeek1 {
    public static void main(String[] args) {
        QuickFindUF mystuff(10); // DOES NOT WORK!
    }  
}

QuickFindUF.java

public class QuickFindUF {
    private int[] id;

    public QuickFindUF(int N){
        id = new int[N];
        for(int i =0; i< N; i++){
            id[i] = i;
        }
    }
}

My problem is that the first line in my main function does not recognize the QuickFindUF object creation. I read that I need to compile the second file into a .class file, and then into a .jar file. How can I do this with netbeans?

I also read a bit about the Classpath. Can I only add .jar files to the classpath?

Answer 1

change

QuickFindUF mystuff(10);

to

QuickFindUF mystuff = new QuickFindUF(10);