com.yeetor.util.Util.java Source code

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Here is the source code for com.yeetor.util.Util.java

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/*
 *
 * MIT License
 *
 * Copyright (c) 2017  https://blog.yeetor.com
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

package com.yeetor.util;

import com.android.ddmlib.*;
import org.apache.commons.lang3.RandomUtils;

import java.io.IOException;
import java.net.ServerSocket;
import java.util.Arrays;
import java.util.Random;

/**
 * Created by harry on 2017/4/17.
 */
public class Util {
    public static byte[] subArray(byte[] byte1, int start, int end) {
        byte[] byte2 = new byte[end - start];
        System.arraycopy(byte1, start, byte2, 0, end - start);
        return byte2;
    }

    public static byte[] mergeArray(byte[] a1, byte[] a2) {
        byte[] arr = Arrays.copyOf(a1, a1.length + a2.length);
        System.arraycopy(a2, 0, arr, a1.length, a2.length);
        return arr;
    }

    /**
     * ???
     * @return
     */
    public static int getFreePort() {
        ServerSocket tmp;
        int i = 10000;
        while (true) {
            try {

                i = RandomUtils.nextInt(10000, 65535);
                tmp = new ServerSocket(i);
                tmp.close();
                tmp = null;
                return i;
            } catch (Exception e4) {
                continue;
            }
        }
    }

}