启动GWT的托管模式时出现UnsatisfiedLinkError

Question

我无法使用Eclipse在托管模式(Debug as - > web application)中启动我的GWT应用程序.它抛出了标题中提到的异常.Eclipse调试向我展示了以下代码:

/*
 * GOOGLE: Since we're bundling our own version of SWT, we need to be
 * able to tell SWT where its dynamic libraries live.  Otherwise we'd
 * have to force our users to always specify a -Djava.library.path
 * on the command line.
 */
String swtLibraryPath = System.getProperty ("swt.library.path");
try {
    String newName = name + "-" + platform + "-" + version; //$NON-NLS-1$ //$NON-NLS-2$
    if (swtLibraryPath != null)
        System.load(swtLibraryPath + System.mapLibraryName(newName));
    else
        System.loadLibrary (newName);
    return;
} catch (UnsatisfiedLinkError e1) {     
    try {
        String newName = name + "-" + platform; //$NON-NLS-1$
        if (swtLibraryPath != null)
            System.load(swtLibraryPath + System.mapLibraryName(newName));
        else
            System.loadLibrary (newName);
        return;
    } catch (UnsatisfiedLinkError e2) {
        throw e1;
    }
}

抛出的异常是e1.我没有对应用程序进行任何更改,只是创建它并启动了调试.

我错过了什么？我正在使用Ubuntu 9.04 64位(不知道这是否重要)

编辑:堆栈跟踪

    Exception in thread "main" java.lang.UnsatisfiedLinkError: /home/rafael/.eclipse/640022211/plugins/com.google.gwt.eclipse.sdkbundle.linux_1.7.0.v200907291526/gwt-linux-1.7.0/libswt-pi-gtk-3235.so: /home/rafael/.eclipse/640022211/plugins/com.google.gwt.eclipse.sdkbundle.linux_1.7.0.v200907291526/gwt-linux-1.7.0/libswt-pi-gtk-3235.so: wrong ELF class: ELFCLASS32 (Possible cause: architecture word width mismatch)
        at java.lang.ClassLoader$NativeLibrary.load(Native Method)
        at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1767)
        at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1663)
        at java.lang.Runtime.load0(Runtime.java:787)
        at java.lang.System.load(System.java:1022)
        at org.eclipse.swt.internal.Library.loadLibrary(Library.java:132)
        at org.eclipse.swt.internal.gtk.OS.(OS.java:22)
        at org.eclipse.swt.internal.Converter.wcsToMbcs(Converter.java:63)
        at org.eclipse.swt.internal.Converter.wcsToMbcs(Converter.java:54)
        at org.eclipse.swt.widgets.Display.(Display.java:126)
        at com.google.gwt.dev.SwtHostedModeBase.(SwtHostedModeBase.java:82)
    Could not find the main class: com.google.gwt.dev.HostedMode. Program will exit.

Answer 1

解决了这个问题.在仔细阅读了堆栈跟踪之后(感谢Warren!),我最终搜索了不同的术语,并确定原因确实是单词宽度问题.

解决方案是安装32位JVM并告诉Eclipse使用它而不是64位JVM.这是通过安装新的JVM,在Eclipse中转到Window> Preferences> Java> Installed JRE并添加新的JVM(记得指向jre dir)来完成的.然后我将其设置为默认值,并设法运行该示例.