Java 安卓系统的问题

我正在使用netbeans 7，我正在运行这段代码

package com.helloworld;

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

public class MainActivity extends Activity
{
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}

我得到了一个错误

Creating output directories if needed...
Compiling aidl files into Java classes...
Compiling RenderScript files into Java classes and RenderScript bytecode...
Generating R.java / Manifest.java from the resources...
compile:
G:\android-sdk\tools\ant\main_rules.xml:384: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds
Compiling 1 source file to D:\java programs\Android\HelloWorld\bin\classes
Converting compiled files and external libraries into D:\java programs\Android\HelloWorld\bin\classes.dex...
=D:\java was unexpected at this time.
G:\android-sdk\tools\ant\main_rules.xml:486: The following error occurred while executing this line:
G:\android-sdk\tools\ant\main_rules.xml:203: apply returned: 255
BUILD FAILED (total time: 1 second)

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这可能是由于任何路径中的某些空格造成的

在这里找同样的