Taking a new line using printf in java? Is %n correct?

Yes, %n is a newline in printf. See the documentation of java.util.Formatter, specifically the conversion table which specifies: ‘n‘ line separator The result is the platform-specific line separator Your output currently only has a linebreak at the end, not at the points that you seem to want them. You would need to use a format like: (and maybe … Read more

Why “no projects found to import”?

Eclipse is looking for eclipse projects, meaning its is searching for eclipse-specific files in the root directory, namely .project and .classpath. You either gave Eclipse the wrong directory (if you are importing a eclipse project) or you actually want to create a new project from existing source(new->java project->create project from existing source). I think you probably want the … Read more

How to get javax.comm API?

Oracle Java Communications API Reference – http://www.oracle.com/technetwork/java/index-jsp-141752.html Official 3.0 Download (Solarix, Linux) – http://www.oracle.com/technetwork/java/javasebusiness/downloads/java-archive-downloads-misc-419423.html Unofficial 2.0 Download (All): http://www.java2s.com/Code/Jar/c/Downloadcomm20jar.htm Unofficial 2.0 Download (Windows installer) – http://kishor15389.blogspot.hk/2011/05/how-to-install-java-communications.html In order to ensure there is no compilation error, place the file on your classpath when compiling (-cp command-line option, or check your IDE documentation).

Java GC (Allocation Failure)

“Allocation Failure” is a cause of GC cycle to kick in. “Allocation Failure” means that no more space left in Eden to allocate object. So, it is normal cause of young GC. Older JVM were not printing GC cause for minor GC cycles. “Allocation Failure” is almost only possible cause for minor GC. Another reason … Read more

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