Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Open Source License 

import java.util.*;
import java.util.function.Function;
import java.util.function.Predicate;
import java.util.stream.Stream;

import static java.util.stream.Collectors.toList;

public class Main {
    public static <T> List<T> filterByType(Collection<? super T> objects, Class<T> type) {
        return objects.stream().filter(type::isInstance).map(type::cast).collect(toList());
    }

    public static <A, B> List<B> map(Collection<? extends A> xs, Function<? super A, ? extends B> mapper) {
        return xs.stream().map(mapper).collect(toList());
    }

    public static <A, B> List<B> map(A[] xs, Function<? super A, ? extends B> mapper) {
        return Stream.of(xs).map(mapper).collect(toList());
    }

    public static <T> List<T> filter(Collection<? extends T> xs, Predicate<? super T> predicate) {
        return xs.stream().filter(predicate).collect(toList());
    }
}