Question

我正在尝试动态加载类org.jawin.FuncPtr Jawin：http://jawinproject.sourceforge.net/ 不幸的是我收到了这个错误： java.lang.ClassFormatError：类文件org / jawin / FuncPtr中常量池中的非法UTF8字符串

我正在使用这个课程：

/*
 * HelloDll.java -
 *
 * This file is part of the Jawin Project: http://jawinproject.sourceforge.net/
 * 
 * Please consult the LICENSE file in the project root directory,
 * or at the project site before using this software.
 */

/* $Id: HelloDll.java,v 1.3 2004/06/14 20:16:38 arosii_moa Exp $ */

package demos;

import org.jawin.COMException;
import org.jawin.FuncPtr;
import org.jawin.ReturnFlags;

/**
 * Demo that uses the Win32 MessageBoxW API-method.
 *
 * @version     $Revision: 1.3 $
 * @author      Stuart Halloway, http://www.relevancellc.com/halloway/weblog/
 */
public class HelloDll {

    public static void main(String[] args) throws Exception {
        FuncPtr msgBox = null;
        try {
            msgBox = new FuncPtr("USER32.DLL", "MessageBoxW");
            msgBox.invoke_I(0, "Hello From a DLL", "From Jawin", 0, ReturnFlags.CHECK_FALSE);
        } catch (COMException e) {
            // handle exception
            e.printStackTrace();
            throw e;
        } finally {
            if (msgBox != null) {
                try {
                    msgBox.close();
                } catch (COMException e) {
                    // handle fatal exception
                    e.printStackTrace();
                    throw e;
                }
            }
        }
    }
}

https://github.com/ghosertTest/TestProject/blob/master/java-workspace/TestJawin/src/demos/HelloDll.java

我用defineClass动态加载它如果我将HelloDll类更改为不使用Jawin，而只是打印“Hello World”，则不会抛出错误并且代码运行流畅，所以我假设类加载器没有任何问题[？]

我如何弄清楚为什么会收到此错误？

加载jawin时，常量池中的非法utf8字符串

0 个答案: