java 两个byte表示 端口号

//可直接在main方法中运行

	//将8080 端口转为2字节byte
    byte[] bytes=new byte[2];
    short port = (short) Integer.parseInt("8080");
    bytes[0] = (byte)((port >> 8) & 0x00ff);
    bytes[1] = (byte)(port & 0x00ff);
	
	//测试结果
	//将byte的值转string 
   StringBuffer st=new StringBuffer();
    for (int i=0;i<bytes.length;i++){
        String hex = Integer.toHexString(bytes[i] & 0xFF);
        if(hex.length() < 2){
            st.append(0);
        }
        st.append(hex);
    }
     System.out.println("byte值为："+String.valueOf(st));
    //转10进制显示端口号
    System.out.println("端口号为："+Integer.parseInt(String.valueOf(st),16));
    ![在这里插入图片描述](https://img-blog.csdnimg.cn/20200529173548684.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQyNzU0MzQ3,size_16,color_FFFFFF,t_70#pic_center)

//ok上图