番石榴:java.lang.NoClassDefFoundError - com.google.common.collect.HashBiMap [英] Guava: java.lang.NoClassDefFoundError - com.google.common.collect.HashBiMap

问题描述

我目前在使用从这里下载的番石榴库时遇到 java.lang.NoClassDefFoundError: com.google.common.collect.HashBiMap 的问题:http://code.google.com/p/guava-libraries/

I currently face the problem of java.lang.NoClassDefFoundError: com.google.common.collect.HashBiMap when using guava libraries downloaded from here: http://code.google.com/p/guava-libraries/

我已经将 guava-12.0.jar 作为参考库添加到我的项目中，但仍然出现错误.您能否就问题所在提供一些建议?谢谢你的帮助

I already add guava-12.0.jar into my project as a reference library but I still get the error. May you give some advice on what the problem would be? Thankyou for your help

package my.project;

import android.app.Activity;
import android.os.Bundle;

import com.google.common.collect.BiMap;
import com.google.common.collect.HashBiMap;

public class MainActivity extends Activity{

     private BiMap<String,String>  bidiMap; 

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);     
          setContentView(R.layout.bible_help_cal);

        bidiMap = HashBiMap.create();           
        bidiMap.put("a","100");
        bidiMap.put("b","200");


    }


}

我收到的错误消息

05-29 18:35:19.737: E/AndroidRuntime(376): FATAL EXCEPTION: main
05-29 18:35:19.737: E/AndroidRuntime(376): java.lang.NoClassDefFoundError: com.google.common.collect.HashBiMap
05-29 18:35:19.737: E/AndroidRuntime(376):  at my.project.MainActivity.onCreate(MainActivity.java:18)
05-29 18:35:19.737: E/AndroidRuntime(376):  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1048)
05-29 18:35:19.737: E/AndroidRuntime(376):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1712)
05-29 18:35:19.737: E/AndroidRuntime(376):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1764)
05-29 18:35:19.737: E/AndroidRuntime(376):  at android.app.ActivityThread.access$1500(ActivityThread.java:122)
05-29 18:35:19.737: E/AndroidRuntime(376):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1002)
05-29 18:35:19.737: E/AndroidRuntime(376):  at android.os.Handler.dispatchMessage(Handler.java:99)
05-29 18:35:19.737: E/AndroidRuntime(376):  at android.os.Looper.loop(Looper.java:132)
05-29 18:35:19.737: E/AndroidRuntime(376):  at android.app.ActivityThread.main(ActivityThread.java:4025)
05-29 18:35:19.737: E/AndroidRuntime(376):  at java.lang.reflect.Method.invokeNative(Native Method)
05-29 18:35:19.737: E/AndroidRuntime(376):  at java.lang.reflect.Method.invoke(Method.java:491)
05-29 18:35:19.737: E/AndroidRuntime(376):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
05-29 18:35:19.737: E/AndroidRuntime(376):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
05-29 18:35:19.737: E/AndroidRuntime(376):  at dalvik.system.NativeStart.main(Native Method)

推荐答案

此错误表示该类在编译时可用，但在运行时找不到.当您的编译时类路径与运行时类路径不同时，通常会发生这种情况.

This error means that the class was available at compile time, but cannot be found during run time. It most commonly happens when your compile time classpath is different from your runtime classpath.

您的运行时类路径很可能不包含 guava jar.要验证这一点，请尝试打印您的类路径 在您的代码中.

It is very likely that your runtime classpath doesn't contain the guava jar. To verify this, try printing your classpath in your code.

在命令行上，您可以使用:java -cp "path/to/guava.jar" MyMainClass

on the command line, you can use: java -cp "path/to/guava.jar" MyMainClass

或者，设置 CLASSPATH 环境变量以包含 jar.

or alternatively, set the CLASSPATH environment variable to include the jar.

这篇关于番石榴:java.lang.NoClassDefFoundError - com.google.common.collect.HashBiMap的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！