Question

我试图在我的Raspberry PI（https://github.com/scream3r/java-simple-serial-connector）上安装一个Java串行通信库，所以我将.so文件（src / java / libs / linux / libjSSC-2.8_armhf.so）复制到了我的库中路径（usr / lib / jvm / java-1.11.0-openjdk-armhf / lib）。

然后，当我测试lib代码示例时：

   import jssc.SerialPortList;

   public class Main {

       public static void main(String[] args) {
           String[] portNames = SerialPortList.getPortNames();
           for(int i = 0; i < portNames.length; i++){
           System.out.println(portNames[i]);
           }
       }
    }

我收到很多错误，指出找不到SerialPortList。

所以我想知道如何正确安装lib。错误：

 javac Main.java

 Main.java:1: error: package jssc does not exist
 import jssc.SerialPortList;
       ^
 ./SerialPortList.java:38: error: cannot find symbol
 private static SerialNativeInterface serialInterface;
               ^
 symbol:   class SerialNativeInterface
 location: class SerialPortList
 Main.java:6: error: cannot access SerialPortList
 String[] portNames = SerialPortList.getPortNames();
                     ^
 bad source file: ./SerialPortList.java
 file does not contain class SerialPortList
 Please remove or make sure it appears in the correct subdirectory of the 
 sourcepath.
./SerialPortList.java:43: error: cannot find symbol
    serialInterface = new SerialNativeInterface();
                          ^
 symbol:   class SerialNativeInterface
 location: class SerialPortList
 ./SerialPortList.java:44: error: cannot find symbol
    switch (SerialNativeInterface.getOsType()) {
            ^
 symbol:   variable SerialNativeInterface
 location: class SerialPortList
 ./SerialPortList.java:45: error: cannot find symbol
        case SerialNativeInterface.OS_LINUX: {
             ^
 symbol:   variable SerialNativeInterface
 location: class SerialPortList
 ./SerialPortList.java:50: error: cannot find symbol
        case SerialNativeInterface.OS_SOLARIS: {
             ^
 symbol:   variable SerialNativeInterface
 location: class SerialPortList
 ./SerialPortList.java:55: error: cannot find symbol
        case SerialNativeInterface.OS_MAC_OS_X: {
             ^
 symbol:   variable SerialNativeInterface
 location: class SerialPortList
 ./SerialPortList.java:60: error: cannot find symbol
        case SerialNativeInterface.OS_WINDOWS: {
             ^
  symbol:   variable SerialNativeInterface
  location: class SerialPortList
  ./SerialPortList.java:293: error: cannot find symbol
    if(SerialNativeInterface.getOsType() == 
  SerialNativeInterface.OS_WINDOWS){
       ^
  symbol:   variable SerialNativeInterface
  location: class SerialPortList
  ./SerialPortList.java:293: error: cannot find symbol
    if(SerialNativeInterface.getOsType() == 
   SerialNativeInterface.OS_WINDOWS){
                                            ^
   symbol:   variable SerialNativeInterface
   location: class SerialPortList
   ./SerialPortList.java:334: error: cannot find symbol
                    if(portHandle < 0 && portHandle != 
    SerialNativeInterface.ERR_PORT_BUSY){
                                                       ^
    symbol:   variable SerialNativeInterface
    location: class SerialPortList
    ./SerialPortList.java:337: error: cannot find symbol
                    else if(portHandle != 
     SerialNativeInterface.ERR_PORT_BUSY) {
                                          ^
     symbol:   variable SerialNativeInterface
     location: class SerialPortList
     13 errors

谢谢。

Answer 1

您需要将您的库添加为外部库。
检查如何在您的IDE上进行操作：Intellij

的示例

编辑以匹配OP的IDE：
Geany Tutorial用于外部库。

右键单击需要该库的项目的名称-> 属性->“项目属性”窗口打开。在类别树中选择“库”节点->在“项目属性”的右侧窗口中按“添加JAR /文件夹”按钮->选择所需的jar。

在Raspberry上导入Java库

1 个答案: