Android List Minus removeRepeatElements(List origin, List target)

Description

Remove repeat elements in origin List by target List.

Declaration

public static <T> List<T> removeRepeatElements(List<T> origin,
        List<T> target) 

Method Source Code

//package com.java2s;
import java.util.ArrayList;
import java.util.Collection;

import java.util.List;

public class Main {
    /**/*w  w  w.  j  a  va 2  s .  c om*/
     * Remove repeat elements in origin List by target List.
     */
    public static <T> List<T> removeRepeatElements(List<T> origin,
            List<T> target) {
        if (origin == null || target == null) {
            return target;
        }

        List<T> temp = new ArrayList<T>();
        if (!isEmpty(origin)) {
            for (T object : target) {
                if (!origin.contains(object)) {
                    temp.add(object);
                }
            }
            return temp;
        }
        return target;
    }

    public static boolean isEmpty(Collection<?> collection) {
        if (size(collection) == 0) {
            return true;
        }
        return false;
    }

    /**
     * Get the size of specified collection.
     */
    public static int size(Collection<?> collection) {
        if (collection == null) {
            return 0;
        }
        return collection.size();
    }
}