You might not know that Java was created by Sun in 1991 and released as a free product with the promise of “Write once and run anywhere”.  This resulted in Java being deployed on a multitude of devices like Servers, desktops, laptops, mobile devices. Oracle purchased Sun in 2010 and then made Java fee based (any commercial use became fee based) in Jan 2019. And any subsequent release of Java or any new patches to the old Java versions are now actually fee based. 

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