Test2

import java.util.ArrayList;
import java.util.Arrays;

public class MyClass {

    public static ArrayList<Integer> removeAll_My(ArrayList<Integer> z, int[] ii) {
        if(ii.length==0) return z;
        ArrayList<Integer> nz = new ArrayList<Integer>();
        Arrays.sort(ii);
        int prev=0;
        for (int x = 0; x < ii.length; x++ ) {
            if(ii[x]-prev>0)
                nz.addAll(z.subList(prev,ii[x]));
            prev=ii[x]+1;
        }
        if(prev<z.size()){
            nz.addAll(z.subList(prev,z.size()));
        }
        return nz;
    }

    public static void removeAll_Ri(ArrayList<Integer> z, int[] ii) {
        z.removeIf(i -> ((i%3)==0));
    }


    public static void main(String[] args) {

        ArrayList<Integer> x = new ArrayList<Integer>();
        ArrayList<Integer> r = new ArrayList<Integer>();


        for(int i=0; i<100000; i++)
            x.add(i);
        int[] myArray;
        myArray = new int[30000];
        for(int i=0; i<30000; i++)
            myArray[i]=i*3;
        long  startTime = System.nanoTime ();
        for(int i=0; i<1; i++)
            removeAll_Ri(x,myArray);
        long  stopTime = System.nanoTime ();
        System.out.println("RIf:" + (stopTime  - startTime ));
        x = new ArrayList<Integer>();
        for(int i=0; i<100000; i++)
            x.add(i);
        startTime = System.nanoTime ();
        for(int i=0; i<1; i++)
            r = removeAll_My(x,myArray);
        stopTime = System.nanoTime ();
        System.out.println("My :" + (stopTime  - startTime ));
    }


}