Error: Could not find or load main class问题解决

错误如下: D:>java Hello Error: Could not find or load main class Hello 代码如下: import org.apache.log4j.Logger; import org.apache.log4j.BasicConfigurator; public class Hello { private static final Logger logger = Logger.getLogger(Hello.class); public static void main(String argv[]) { BasicConfigurator.configure(); logger.debug("Hello world."); logger.info("What a beatiful day."); } } Java环境变量设置有问题,没有包括本目录,解决方法一: 在命令行中指定Classpath D:>java -classpath “.;D:\apache-log4j-1.2.16\log4j-1.2.16.ja r” Hello 0 [main] DEBUG Hello – Hello world.

findViewById返回gridLayout导致异常解决

以下语句导致了程序异常, GridLayout gridLayout = (GridLayout)findViewById(R.id.gridLayout); 参考链接,在XML中定义的gridLayout与在程序中定义的gridLayout不一致,导至了程序异常,改为一致的定义,问题解决。 程序中的定义为: import android.widget.GridLayout; 然而XML中的定义为: androidx.gridlayout.widget.GridLayout 解决方案: 程序改为以下: androidx.gridlayout.widget.GridLayout gridLayout = findViewById(R.id.gridLayout); 额外的问题,layout如果重叠,如何调整不同layout的显示顺序,在Android Studio中的Component Tree里调整先后顺序,就可以调整layout显示的优先级。 Reference App crashing in the part of Grid layout declaration

J2EE SDK installation error:could not find the required version of Java(TM) 2 runtime environment

最近安装64位的J2EE SDK碰到以下问题: could not find the required version of the Java(TM) 2 runtime environment in ‘(null)’ 原因应该是安装包混淆了JRE的安装位置 参考链接,指定JRE位置,解决问题: D:>java_ee_sdk-6u3-jdk7-windows-x64.exe -j “C:\Program Files\Java\jre7” Reference How to fix error: could not find the required version of the Java(TM) 2 runtime environment in ‘(null)’

VMWare Workstation 10.0.4 install guest tool on RHEL7

Summary install GCC and kernel-devel require to remove open-vm-tools Error struct dentry has no member named d_alias Error struct dentry has no member named d_count successful result Reference Summary Installed the Vmware tool in the RHEL7 guest system, during the installation, encountered compiling problem for vmhgfs application (for file share between host and guest system).

application was unable to start correctly (0xc0150002)

Continue from previous blog entry, after I sent the life cycle status software to customer, the customer feedback cannot be running at his computer, error box showing (The application was unable to start correctly (0xc0150002)), the screen shot is as: Tried first solution, as mentioned on Google, I suggest customer to install “Microsoft Visual C++ 2008 RedistributablePackage” in the system, but the issue was not resolved, the customer used the dependency checker and found some DLL missing.