Q:

Int cannot be converted to boolean?? converting code from C to Java

I have a code that I am converting into Java, Im new to programming but I already have done some work on both PL, although I do not understand why I get this error
The original C code is: 
#include <stdio.h>
#include <conio.h>

int main () {
    int i, j, k;
    for (i=1; i<=59; i++) {
        k = 1;
        for (j=2; j<i; j++)
            if (i % (j*j) == 0) k = 0;
        if (k) printf ("%d\n", i);
    }
    printf("%d",i);
    getch();
}

My converted Java code:
import java.util.*;
public class squarefree {

    public static void main(String[] args) {
        int i, j,k;
        for(i=1; i<60; i++){
            k=1;
            for(j=2; j<i; j++){
                if(i % (j*j) == 0) 
                    k=0;
                if(k) System.out.println(i);
            }
            System.out.println(i);
        }
    }
}

Can someone please explain? Thanks guys :)

A:

2 ways to fix this: 
1) Use if (k != 0), since in java an int is an int and a boolean is its own type.
2) Having said that, why not change k to a boolean value? You're using it for a boolean check, and it only changes from 0 to 1, so if you actually use the boolean value it'll be much easier to read.
eg:
boolean k = true;

// your code here
    // your ifstatement to change k
    k = false;

// print code
if (k) ...

