Sun Microsystems' ( JAVA) CEO Jonathan Schwartz has had a lot on his plate in the last few years but wants to reassure investors and customers that the tech giant's future is still rosy.

"I'm not worried about the future, I'm focused on its arrival date," he wrote in a blog posting earlier this week. "I'm neither worried about the role information technology will play in the economy, nor am I worried about the relevance of Sun's offerings."

The Santa Clara, Calif.-based firm has nonetheless seen its shares plunge 71% in the last 12 months, underlining the scale of Schwartz's challenge.

Faced with stiff competition from IBM ( IBM) and Hewlett-Packard ( HPQ), not to mention a brutal spending climate, Sun has also had to contend with falling sales. The firm's revenue, for example, fell 10% year-over-year in its recent second-quarter results.

Sun also announced plans to cut up to 6,000 jobs, or 18% of its global workforce, last year in its latest attempt to rejuvenate its business.

Set against this backdrop, Schwartz acknowledged that the global economy is problematic.

"I am routinely talking to customers now partially owned by governments, whose share prices have declined 95% or more, whose balance sheets and basic business models are under extraordinary duress," he wrote in his blog. "Sure, innovation loves a crisis, but only after customers have stepped out from under their desks."

The CEO, who took Sun over from Scott McNealy in 2006, believes that that there are still positives, even in a bleak economy.

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