Null check is required before call of a function synchronized is critical section Exception chaining String is immutable == comparing the address, use .equals instead Refer to https://www.javatpoint.com/
On 2.5: gem install ox --platform=ruby On 1.9.3: Error occurs with following steps Download "DevKit-tdm-32-4.5.2-20110712-1620-sfx.exe" from https://rubyinstaller.org/downloads/archives/ Follow https://github.com/oneclick/rubyinstaller/wiki/Development-Kit But compilation issue of "undefined reference to `RSTRUCT_GET'" is encountered
My knowledge is rusty, needs to constantly reading and writing. volatile (vs synchronized) has different meaning in Java. Unlike C++, everything is either volatile or constant. immutable is important keyword in Java, means the value cannot be changed. Java slowness is on garbage collector. Thus, implementation should be organized in certain way.