我有一个 Java 程序,它显示了我系统中可用的端口列表。
该程序在命令提示符下运行良好。但是现在我想通过 PL/SQL 使用这个 Java 程序。
但我正面临附加的错误。
花很多时间但不能成功。
下面是我的 Java 程序。
import javax.comm.*;
import java.util.*;
/** List all the ports available on the local machine. **/
public class TestPorts
{
public static void main (String args[])
{
Enumeration port_list = CommPortIdentifier.getPortIdentifiers();
while (port_list.hasMoreElements())
{
CommPortIdentifier port_id = (CommPortIdentifier)port_list.nextElement();
if (port_id.getPortType() == CommPortIdentifier.PORT_SERIAL)
{
System.out.println ("Serial port: " + port_id.getName());
}
else if (port_id.getPortType() == CommPortIdentifier.PORT_PARALLEL)
{
System.out.println ("Parallel port: " + port_id.getName());
}
else
System.out.println ("Other port: " + port_id.getName());
}
} // main
} // class PortList[enter image description here][1]
D:\>loadjava -u hr1/hr1@orcl -v -resolve TestPorts.java
arguments: '-u' 'hr1/hr1@orcl' '-v' '-resolve' 'TestPorts.java'
creating : source TestPorts
loading : source TestPorts
resolving: source TestPorts
errors : source TestPorts
ORA-29535: source requires recompilation
TestPorts:10: cannot resolve symbol
symbol : variable CommPortIdentifier
location: class TestPorts
Enumeration port_list = CommPortIdentifier.getPortIdentifiers();
^
TestPorts:14: cannot resolve symbol
symbol : class CommPortIdentifier
location: class TestPorts
CommPortIdentifier port_id = (CommPortIdentifier)port_list.nextElement();
^
TestPorts:14: cannot resolve symbol
symbol : class CommPortIdentifier
location: class TestPorts
CommPortIdentifier port_id = (CommPortIdentifier)port_list.nextElement();
^
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