Many of the early sewing machines were powered by a treadle mechanism. The treadle was operated by pressing down on it with a foot, or both feet, to cause a rocking movement. This movement spins a large wheel on the treadle frame, connected by a thin leather belt to a smaller driving wheels on the sewing machine.
null. adj. 1. Having no legal force; invalid: render a contract null and void.2.ull. adj. 1. Having no legal force; invalid: render a contract null and void. 2.
So, it is important for Java beginners to take a basic course such as Java Fundamentals to avoid wasting time on such petty errors. Moreover, Java Null Pointer Exception is a Run time error. Instead, Null Pointer Exception occurrences in the code should actually be reported during the code compilation. There are few good languages out there in the market which report Null Pointer Exception at compile time to avoid such embarrassments at runtime.