How to make time timers from 600sec to 0? thank you so much
// Current time in milliseconds (since 1.1.1971, I think) long time = System.currentTimeMillis(); // Measure the time between two moments (in milliseconds) long startTime = System.currentTimeMillis(); // Some operations… long duration = System.currentTimeMillis() - startTime; // Convert milliseconds into seconds double seconds = timeInNanos * 0.001;