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2021-03-29 00:28:56 -0500 | answered a question | catkin_create_pkg The reason for this error is that in Python 3, strings are Unicode, but when transmitting on the network, the data needs |
2018-09-18 01:49:06 -0500 | commented answer | Global variable python try this one...How to Global Variable in Python |
2017-02-13 00:08:21 -0500 | answered a question | Rosjava gradle build java classpath Using wildcards in java classpath Wild cards were introduced from Java 6. Class path entries can contain the basename wildcard character *, which is considered equivalent to specifying a list of all the files in the directory with the extension .jar or .JAR. For ex. a classpath entry consisting simply of * expands to a list of all the jar files in the current directory. Example java -cp "lib/*" %MAINCLASS% where %MAINCLASS% is the class containing your main method. How to use a wildcard in the classpath to add multiple jars java -cp "lib/*" -jar %MAINJAR% where %MAINJAR% is the jar file to launch via its internal manifest. If you need only specific jars, you will need to add them individually. The classpath string does not accept generic wildcards like Jar, *.jar, hiber etc. Example The following entry does not work: java -cp "Halo.jar;lib/*.jar" ni.package.MainClass Correct entry is : java -cp "Halo.jar;lib/*" ni.package.MainClass More about....Java Classpath Ling |
2016-11-16 00:59:53 -0500 | answered a question | android_tutorial_teleop null pointer exception on contact The NullReferenceException is designed as a valid runtime condition that can be thrown and caught in normal program flow. It indicates that you are trying to access member fields, or function types, on an object reference that points to null. That means the reference to an Object which is not initialized. Manee |