Hey Nitin,
dont be bothered bout, how hard will be Java or .Net, actually i guess by java u meant advanced java(J2EE). Programming in J2EE is a bit complicated as compared to .Net or C# as it contains no Dragn drop programming, but J2EE has more support as it is more Open Source and .Net is Microsoft centric. I guess u better go for Java first then head to .Net.