Among all job postings, there are 1.16 percentage of jobs for Java and 1.03 percentage of job postings for .Net. So, Java and .Net has an almost equal number of job postings.
Based on salaries submitted by employees, the average salary of a Junior java developer salary in India and the USA is 4.5 lakhs INR per annum and $ 56,000 per year respectively. In India, For Senior java developer is 9.28 lakhs per annum and in the USA is $101,000. In India, For junior .Net developer is 4.1 lakhs per annum and in the USA is $61,000. In India, For senior .Net developer is 8 lakhs per annum and in the USA is $96,000 per year.
I would suggest to you this Java course by Intellipaat if you are interested.
You can watch this video on Java vs .net to compare which is better for you: