是另一个char数组的一个子集

/** 来 自 n o w j a v a . c o m**/


//package com.nowjava;

import java.util.ArrayList;


import java.util.List;


public class Main {

    public static void main(String[] argv) throws Exception {

        char[] charArr1 = new char[] { 'b', 'o', 'o', 'k', '2', 's', '.',

                'c', 'o', 'm', 'a', '1', };

        char[] charArr2 = new char[] { 'b', 'o', 'o', 'k', '2', 's', '.',

                'c', 'o', 'm', 'a', '1', };

        System.out.println(isSubset(charArr1, charArr2));/*from 时代Java - nowjava.com*/

    }


    public static boolean isSubset(char[] charArr1, char[] charArr2) {

        if (charArr1.length > charArr2.length) {

            return false;

        }

        List<Character> charList1 = toList(charArr1);

        List<Character> charList2 = toList(charArr2);

        // cannot do containsAll as there can be duplicate characters

        for (Character charValue : charList1) {

            if (charList2.contains(charValue)) {

                charList2.remove(charValue);

            } else {

                return false;

            }

        }

        return true;

    }


    private