TechnicallyJava.java

public class TechnicallyJava {

public Map<Integer, Integer> zip(int[] a, int[] b) {
        assert a.length == b.length;
        Map<Integer, Integer> map = new HashMap<Integer, Integer>();
        for (int i = 0; i < a.length; i++) {
            map.put(a[i], b[i]);
        }
        return map;
    }
}
    
public int[] list(int...arr) { return arr; }

public static void main(String[] args) {
    System.out.println(zip(list(0,1,2,3,4), list(0,1,2,3,4)));
}

}