thread-sleep

This is a code for drawing points on calculated locations by Bresenham's algorithm: public void drawBresenhamPoints(Graphics2D g2, List<Point> bresenham) throws InterruptedException { Graphics2D g = (Graphics2D) g2; if(bresenham == null) return; g.setColor(Color.DARK_GRAY); for(int i = 0; i < bresenham.size(); i = i+20) { int x = bresenham.get(i).x - pointWidth1/2; int y = bresenham.get(i).y - pointWidth1/2; int ovalW = pointWidth1; int ovalH = pointWidth1; g.fillOval(x, y, ovalW, ovalH); // delay try { Thread.sleep(10); } catch(Throwable e) { System.out.println(e.getMessage()); } } } The list

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) { int count = jSlider1.getValue(); int delay = jSlider2.getValue(); int valueOfSlider = jSlider2.getValue(); int valueOfSlider2 = jSlider1.getValue(); while (count > 0) { count--; String count2 = ""+count; jLabel3.setText(count2); try {Thread.sleep(delay); } catch (InterruptedException ie) { } } It will eventually show the final number on the jLabel but it does not incrementally update the number. any help Swing is single-threaded . Therefore, long-running tasks should never take place in the EDT . This includes sleeping.

I know Thread.sleep() can make a java thread suspend for a while, like certain milliseconds and certain nanoseconds. But the problem is the invocation of this function also causes overhead. For example, if I want a thread to suspend for 100 nanoseconds, and I call Thread.sleep(0, 100) . The whole cost for this process is invocation_cost + 100 nanosceonds , which may be much larger the what I want. How could I avoid this problem, and achieve my purpose? The reason I need this is that I want to do simulation offline. I profiled the execution time of a task; Now I want to simulate this execution

I have read that Thread.sleep() will pause the currently running thread for the time specified after which it goes back to runnable state waiting for it's turn to run. Also, if called from synchronized context, sleep() doesn't release the lock it holds. So I was wondering when it will release the lock. If the thread, put on sleep, never gets the chance to run so it will always keep the lock with itself and then how other threads get to enter synchronized methods/block. I am not sure if I am asking valid question. But please help me out. So I was wondering when it will release the lock. It will

I'm having trouble with this code I am using to create a roulette wheel. The goal is to spin the wheel when I click the "SPIN!" button. I have done this by creating a for loop that should change the status of the wheel from true to false, which changes the orientation. This, when done fast enough, should create the illusion of movement. THE PROBLEM I AM HAVING : is that my wheel is only repainting after the whole for loop is done, despite my placement of the repaint(). So, it only spins one tick. Here is some sample code of my ActionListener: public class spinListener implements ActionListener