Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.util.Collection;

public class Main {
    public static <T> void addIfNotNullNotExist(Collection<T> col, T val) {
        if (val != null && !col.contains(val)) {
            col.add(val);
        }
    }

    public static <T> void addIfNotNullNotExist(Collection<T> col, T[] arr) {
        if (isEmpty(arr)) {
            return;
        }
        for (T val : arr) {
            addIfNotNullNotExist(col, val);
        }
    }

    public static <T> boolean isEmpty(T[] vals) {
        return vals == null || vals.length == 0;
    }

    public static <T> boolean isEmpty(T[] vals, boolean checkNullVal) {
        boolean isEmpty = vals == null || vals.length == 0;
        if (isEmpty) {
            return true;
        }
        if (checkNullVal) {
            for (T val : vals) {
                if (val != null) {
                    return false;
                }
            }
            isEmpty = true;
        }
        return isEmpty;
    }

    public static boolean isEmpty(Collection<?> col) {
        return col == null || col.isEmpty();
    }
}