Merge list to a single List - Java java.util

Java examples for java.util:List Operation

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Description

Merge list to a single List

Demo Code


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

import java.util.Collections;

import java.util.List;

public class Main {
    public static void main(String[] argv) {
        List lists = java.util.Arrays.asList("asdf", "java2s.com");
        System.out.println(listCat(lists));
    }//from   w w w.j  ava 2  s  . c o m

    @SafeVarargs
    public static <A> List<A> listCat(List<A>... lists) {
        if (lists.length == 0)
            return Collections.<A> emptyList();
        else if (lists.length == 1)
            return lists[0];
        else {
            List<A> full = new ArrayList<A>();
            for (List<A> xs : lists)
                full.addAll(xs);
            return full;
        }
    }
}

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