A static block in Java is a block of code that is executed at the time of loading a class for use in a Java application. It starts with a 'static {' and it is used for initializing static Class members in general — and is also known as a 'Static Initializer'. The most powerful use of a static block can be realized while performing operations that are required to be executed only once for a Class in an application lifecycle.
Let me provide a brief on when and how a static block is executed. A Class needs to be loaded by a ClassLoader whenever one of the following events happen:
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