问题描述
我只是运行一些代码来获取我的计算机上的可用端口列表,当我有 3 个空闲的 com 端口时它返回 false.如何解决这个问题?
I just run some codes to get a list of available ports n my cmputer and it returned me false when I have 3 com ports that are free. How do I solve this prob?
我的代码:
public static void main(String[] args) { //SerialParameters params=new SerialParameters(); // System.out.println(CommPortIdentifier.PORT_SERIAL ); Enumeration portList = CommPortIdentifier.getPortIdentifiers(); System.out.println(portList.hasMoreElements()); while(portList.hasMoreElements()){ System.out.println("Has more elements"); CommPortIdentifier portId = (CommPortIdentifier) portList.nextElement(); if (portId.getPortType() == CommPortIdentifier.PORT_PARALLEL) { System.out.println(portId.getName()); } else{ System.out.println(portId.getName()); } } }
输出:假的
推荐答案
看来您的 javax.comm API 设置可能不正确.确保您已完成以下操作:
It appears your setup of the javax.comm API may not be correct. Make sure you have done the following:
- 将comm.jar文件放到jre/lib/ext目录下.
- 将javax.comm.properties文件放在jre/lib目录下.
- 将win32com.dll放到jre/bin目录下.
- Placed the comm.jar file in the jre/lib/ext directory.
- Placed the javax.comm.properties file in the jre/lib directory.
- Placed the win32com.dll in the jre/bin directory.
上述每个组件都应该"在这里.
Each of the above components "should" be available here.