As a temporary workaround for rendering problems under VMware Fusion, switched...

As a temporary workaround for rendering problems under VMware Fusion, switched to the thread-unsafe usage of `paintImmediately`.

src/main/java/edu/unl/cse/soft160/tetris/Tetris.java

@@ -7,6 +7,7 @@ import java.awt.Font;
 import java.awt.Color;
 import java.awt.Graphics;
 import javax.swing.JFrame;
+import javax.swing.JPanel;
 
 import java.awt.event.KeyEvent;
 import java.awt.event.KeyListener;
@@ -184,7 +185,8 @@ public class Tetris extends JFrame {
 
 	protected void placeShape() {
 		drawShape(COLORS[shape]);
-		repaint();
+		JPanel panel = (JPanel)getContentPane();
+		panel.paintImmediately(0, 0, panel.getWidth(), panel.getHeight());
 	}
 
 	protected void unplaceShape() {
@@ -271,13 +273,18 @@ public class Tetris extends JFrame {
 		maybeAdjustShape(0, 1, 0);
 	}
 
+	public Tetris(int width, int height) {
+		super("Tetris");
+		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		setSize(width, height);
+		setContentPane(new JPanel() {
 			@Override
 			public void paint(Graphics graphics) {
 				super.paint(graphics);
-		int xScale = getWidth() / WIDTH;
-		int yScale = getHeight() / HEIGHT;
-		for (int x = 0; x < WIDTH; ++x) {
-			for (int y = 0; y < HEIGHT; ++y) {
+				int xScale = getWidth() / Tetris.WIDTH;
+				int yScale = getHeight() / Tetris.HEIGHT;
+				for (int x = 0; x < Tetris.WIDTH; ++x) {
+					for (int y = 0; y < Tetris.HEIGHT; ++y) {
 						graphics.setColor(board[x][y]);
 						graphics.fillRect(xScale * x, yScale * y, xScale, yScale);
 					}
@@ -288,11 +295,7 @@ public class Tetris extends JFrame {
 				graphics.drawString(scoreString, (getWidth() - graphics.getFontMetrics().stringWidth(scoreString)) / 2,
 						(getHeight() / 2 - graphics.getFontMetrics().getHeight()) / 2);
 			}
-
-	public Tetris(int width, int height) {
-		super("Tetris");
-		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
-		setSize(width, height);
+		});
 		addKeyListener(new KeyListener() {
 			public void keyPressed(KeyEvent event) {
 				switch (event.getKeyCode()) {