串口调试助手能连上，自己的程序拋PortInUseException

[s0cket]

代码：

 
import java.util.Enumeration;

import gnu.io.CommPort;
import gnu.io.CommPortIdentifier;
import gnu.io.NoSuchPortException;
import gnu.io.PortInUseException;
import gnu.io.SerialPort;
import serialException.PortInUse;

public class Test {
	
	@SuppressWarnings("unchecked")
	public static void main(String[] args) throws Exception {
		// TODO Auto-generated method stub
		Enumeration<CommPortIdentifier> portList = CommPortIdentifier.getPortIdentifiers();
		while (portList.hasMoreElements()) {
			String portName = portList.nextElement().getName();

			System.out.println(portName);
			try {
				CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier(portName);
				System.out.println(portName);
				System.out.println("cuan");
				CommPort commPort = portIdentifier.open(portName,2000);
				System.out.println("串口被占用");
				if(commPort instanceof SerialPort){
					SerialPort serialPort = (SerialPort)commPort;
					//设置串口的波特率等参数
					serialPort.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1, SerialPort.PARITY_NONE);
				
					System.out.println("Open " + portName + "sucessfully!");
				}
		
			} catch (PortInUseException e1) {
				throw new PortInUse(); //自定义的异常
			} catch (NoSuchPortException e2) {
				e2.printStackTrace();
			}
				
		}		
	
	}
}

运行结果


串口调试程序能连上：


拋PortInUseException的语句：

CommPort commPort = portIdentifier.open(portName,2000);

[s0cket]

goole出来的：新建了/var/lock目录解决了，每次运行都会生成一个lock文件。

[alunSemiconductor]

把串口调试工具关了再试试呢