Question

这是我用于按钮点击事件的Java代码。我要做的是将参数传递给我正在调用的python文件...但我收到args[0]和args[1]（cannot find symbol）的错误。

我该如何避免这个问题？如何将参数传递给我以这种方式调用的Python文件？

private void jButton1MouseClicked(java.awt.event.MouseEvent evt) {

try { 
    PythonInterpreter.initialize(System.getProperties(), System.getProperties(), new String[0]);
    PythonInterpreter interp = new PythonInterpreter();

    interp.set("firstName", args[0]);
    interp.set("lastName", 1);
    interp.execfile("‪C:\\Users\\aswin-pc\\Desktop\\pythontest.py");
}
catch (Exception e) {
    e.printStackTrace();
}

Answer 1

您收到该错误是因为args[0]和args[1]只能在主方法中使用Java访问：

public class Test {

    public static void main(String[] args) {
        System.out.println(args[0])    // You can access it here!
    }

    private void jButton1MouseClicked(java.awt.event.MouseEvent evt) {
        System.out.println(args[0])    // Will throw exception, you can't access it here!
    }
}

您应该在创建时尝试将args传递给您的课程：

public class Test {

    private String[] args;

    public Test(String[] args) {
        this.args = args;    // Sets the class args[] variable from the passed parameter
    }

    public static void main(String[] args) {
        Test myTest = new Test(args);
    }

    private void jButton1MouseClicked(java.awt.event.MouseEvent evt) {
        System.out.println(args[0])    // You can now access the class variable args from here!
    }
}

将参数从Java传递到Python时出错？

1 个答案: