java.lang

PySpark: How to covert column with Ljava.lang.Object

由 十年热恋 提交于 2019-12-24 20:49:48
问题 I created data frame in PySpark by reading data from HDFS like this: df = spark.read.parquet('path/to/parquet') I expect the data frame to have two column of strings: +------------+------------------+ |my_column |my_other_column | +------------+------------------+ |my_string_1 |my_other_string_1 | |my_string_2 |my_other_string_2 | |my_string_3 |my_other_string_3 | |my_string_4 |my_other_string_4 | |my_string_5 |my_other_string_5 | |my_string_6 |my_other_string_6 | |my_string_7 |my_other

Why I am able to re-create java.lang package and classes?

由 冷暖自知 提交于 2019-12-18 10:48:19
问题 I am just playing with package structure. And to my surprise I can bypass the default classes by creating my package and class name with that name. For ex: I created a package called java.lang and Class is Boolean . When I import java.lang.Boolean it's not the JDK's version of Boolean . It's mine. It's just showing the methods of Objects which every object java have. Why so ? Why I am allowed to create the package java.lang ? And the program runs fine. Another baffle is if I create a Class

Ubuntu 18.04/Netbeans 10.0 Fatal Error: Unable to find package java.lang in classpath or bootclasspath

由 戏子无情 提交于 2019-12-11 15:26:22
问题 First, I work on Ubuntu 18.04 with netbeans 10.0 and open JDK 11. When I create a basic new project, alerts directly triggered. cannot access java.lang Fatal Error: Unable to find package java.lang in classpath or bootclasspath I tried to uninstall/install netbeans and openJKD 11 but nothing work. I looked on lots of forums discussions with this kind of problem but nothing work. For information, xxx:~$java -version gives openjdk version "11.0.3" 2019-04-16 OpenJDK Runtime Environment (build

NetBeans Clean & Build Android error: Java.Lang X500Principal access

由 我是研究僧i 提交于 2019-12-05 00:23:00
问题 I’m wondering if anyone can help on this one. An error occurs when cleaning and building the simplest of projects. (see below) Steps leading to error: As a new employee and therefore new user on a machine no older than 4 months, I started by opening NetBeans 8.2 - with both NetBeans and Android Studio (for the sdk) installed for me a week before. There was no Android plugin installed however, so I implemented the nbandroid update centre to install the plugin. I then connected the sdk - found

Why I am able to re-create java.lang package and classes?

由 守給你的承諾、 提交于 2019-11-29 23:37:17
I am just playing with package structure. And to my surprise I can bypass the default classes by creating my package and class name with that name. For ex: I created a package called java.lang and Class is Boolean . When I import java.lang.Boolean it's not the JDK's version of Boolean . It's mine. It's just showing the methods of Objects which every object java have. Why so ? Why I am allowed to create the package java.lang ? And the program runs fine. Another baffle is if I create a Class with name Object and try to runs the program then an exception java.lang.SecurityException: Prohibited

java.lang.NoClassDefFoundError: java.util.Objects

由 主宰稳场 提交于 2019-11-29 10:41:58
I'm getting the following crash report in Android development Console. My app runs fine on the simulator or devices that I tried the app on, but for some reason on a Galaxy Nexus (Maguro) it doesn't run. I don't get any compile errors either. java.lang.NoClassDefFoundError: java.util.Objects at com.nivelsonic.nivelsonic.MyTankActivity$5.onResponse(MyTankActivity.java:199) at com.nivelsonic.nivelsonic.MyTankActivity$5.onResponse(MyTankActivity.java:160) at com.android.volley.toolbox.StringRequest.deliverResponse(StringRequest.java:60) at com.android.volley.toolbox.StringRequest.deliverResponse

java.lang.NoClassDefFoundError: java.util.Objects

由 会有一股神秘感。 提交于 2019-11-28 03:46:19
问题 I'm getting the following crash report in Android development Console. My app runs fine on the simulator or devices that I tried the app on, but for some reason on a Galaxy Nexus (Maguro) it doesn't run. I don't get any compile errors either. java.lang.NoClassDefFoundError: java.util.Objects at com.nivelsonic.nivelsonic.MyTankActivity$5.onResponse(MyTankActivity.java:199) at com.nivelsonic.nivelsonic.MyTankActivity$5.onResponse(MyTankActivity.java:160) at com.android.volley.toolbox
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