如何閱讀日食錯誤

Question

有人可以在這裏解釋如何準確定位日食中的錯誤？例如像這樣..

07-07 00:46:34.968: E/AndroidRuntime(401): FATAL EXCEPTION: main 
07-07 00:46:34.968: E/AndroidRuntime(401): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.localhost.one/com.localhost.one.Main}: java.lang.NullPointerException 
07-07 00:46:34.968: E/AndroidRuntime(401): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663) 
07-07 00:46:34.968: E/AndroidRuntime(401): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679) 
07-07 00:46:34.968: E/AndroidRuntime(401): at android.app.ActivityThread.access$2300(ActivityThread.java:125) 
07-07 00:46:34.968: E/AndroidRuntime(401): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033) 
07-07 00:46:34.968: E/AndroidRuntime(401): at android.os.Handler.dispatchMessage(Handler.java:99) 
07-07 00:46:34.968: E/AndroidRuntime(401): at android.os.Looper.loop(Looper.java:123) 
07-07 00:46:34.968: E/AndroidRuntime(401): at android.app.ActivityThread.main(ActivityThread.java:4627) 
07-07 00:46:34.968: E/AndroidRuntime(401): at java.lang.reflect.Method.invokeNative(Native Method) 
07-07 00:46:34.968: E/AndroidRuntime(401): at java.lang.reflect.Method.invoke(Method.java:521) 
07-07 00:46:34.968: E/AndroidRuntime(401): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
07-07 00:46:34.968: E/AndroidRuntime(401): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
07-07 00:46:34.968: E/AndroidRuntime(401): at dalvik.system.NativeStart.main(Native Method) 
07-07 00:46:34.968: E/AndroidRuntime(401): Caused by: java.lang.NullPointerException 
07-07 00:46:34.968: E/AndroidRuntime(401): at org.json.JSONTokener.nextCleanInternal(JSONTokener.java:112) 
07-07 00:46:34.968: E/AndroidRuntime(401): at org.json.JSONTokener.nextValue(JSONTokener.java:90) 
07-07 00:46:34.968: E/AndroidRuntime(401): at org.json.JSONArray.<init>(JSONArray.java:87) 
07-07 00:46:34.968: E/AndroidRuntime(401): at org.json.JSONArray.<init>(JSONArray.java:103) 
07-07 00:46:34.968: E/AndroidRuntime(401): at com.localhost.one.Main.onCreate(Main.java:80) 
07-07 00:46:34.968: E/AndroidRuntime(401): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047) 
07-07 00:46:34.968: E/AndroidRuntime(401): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627) 
07-07 00:46:34.968: E/AndroidRuntime(401): ... 11 more 

Eclipse的IDE是偉大的，它有很多插件，但它缺乏什麼VS有很多。如果有人能告訴我如何精確地查明我的錯誤或我的空指針的位置，從什麼變量，從eclipse中的什麼方法？謝謝。在Eclipse中尋找錯誤是很長的時間在Eclipse耗時..

Answer 1

在這裏你會發現你的包名和錯誤

Caused by: java.lang.NullPointerException <<<<Error 
07-07 00:46:34.968: E/AndroidRuntime(401): at org.json.JSONTokener.nextCleanInternal(JSONTokener.java:112) 
07-07 00:46:34.968: E/AndroidRuntime(401): at org.json.JSONTokener.nextValue(JSONTokener.java:90) 
07-07 00:46:34.968: E/AndroidRuntime(401): at org.json.JSONArray.<init>(JSONArray.java:87) 
07-07 00:46:34.968: E/AndroidRuntime(401): at org.json.JSONArray.<init>(JSONArray.java:103) 
07-07 00:46:34.968: E/AndroidRuntime(401): at com.localhost.one.Main.onCreate(Main.java:80) 


Line no.80 and class name Main.java