A linguaguem SQL (Structured Query Language) é uma linguagem de alto nível para manipulação de dados dentro do modelo relacional. Seu objetivo é fornecer uma interface de alto nível ao usuário. É uma linguagem não procedural e não cabe ao usuário definir como o gerenciador de banco de dados executará uma tarefa, mas somente o que ele deve fazer.
Read Moreimport java.applet.Applet; import java.awt.Graphics; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; public class AppletAnimation extends Applet implements Runnable { int frameNumber = -1; int delay = 100; Thread animatorThread; boolean frozen = false; public void init() { String str; addMouseListener(new MouseAdapter() { public void mousePressed(MouseEvent e) { if (frozen) { frozen = false; start(); } else { frozen = true; stop(); }
Read Moreimport java.awt.Color; import java.awt.Graphics; import java.awt.Insets; import java.util.Timer; import java.util.TimerTask; import javax.swing.JFrame; public class Animate extends JFrame { private static int DELAY = 100; Insets insets; Color colors[] = { Color.RED, Color.ORANGE, Color.YELLOW, Color.GREEN, Color.BLUE, Color.MAGENTA }; public void paint(Graphics g) { super.paint(g); if (insets == null) { insets = getInsets(); } // Calculate each time in case of resize int x = insets.left; int y = insets.top; int width = getWidth() – insets.left – insets.right;
Read MoreQuando falamos a nível de dados (campos e registros), estamos tratando com o objeto Recordset. Vamos mostrar como encontrar dados específicos
Read Moreimport java.awt.Graphics; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.awt.image.BufferedImage; import java.awt.image.ColorModel; import java.awt.image.DataBuffer; import java.awt.image.DataBufferByte; import java.awt.image.IndexColorModel; import java.awt.image.Raster; import java.awt.image.WritableRaster; import java.util.Random; import javax.swing.JComponent; import javax.swing.JFrame; public class StaticGenerator extends JComponent implements Runnable { byte[] data; BufferedImage image; Random random; public void initialize() { int w = getSize().width, h = getSize().height; int length = ((w + 7) * h) / 8;
Read Moreimport java.awt.Color; import java.awt.Dimension; import java.awt.GradientPaint; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Paint; import java.awt.RenderingHints; import java.awt.Shape; import java.awt.geom.GeneralPath; import javax.swing.JComponent; import javax.swing.JFrame; public class Hypnosis1 extends JComponent implements Runnable { private int[] coordinates; private int[] deltas; private Paint paint; public Hypnosis1(int numberOfSegments) { int numberOfCoordinates = numberOfSegments * 4 + 2; coordinates = new int[numberOfCoordinates]; deltas = new int[numberOfCoordinates]; for (int i = 0; i < numberOfCoordinates; i++) {
Read Moreimport java.awt.Font; import java.awt.FontMetrics; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.Timer; public class FontSizeAnimation extends JPanel implements ActionListener { Timer timer; int x = 1; float alpha = 1; public FontSizeAnimation() { timer = new Timer(8, this); timer.setInitialDelay(190); timer.start(); } public void paint(Graphics g) { super.paintComponent(g);
Read Moreimport java.awt.AlphaComposite; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Image; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.ImageIcon; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.Timer; public class FadeOutImage extends JPanel implements ActionListener { Image myImage = new ImageIcon(“a.jpg”).getImage(); Timer timer = new Timer(20, this); private float alpha = 1f; public FadeOutImage() { timer.start(); } public void paint(Graphics g) { super.paint(g); Graphics2D g2d = (Graphics2D) g;
Read Moreimport java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Rectangle; import java.awt.RenderingHints; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.Timer; public class SwingTimerBasedAnimationScaleRotate extends JPanel implements ActionListener { Timer timer; private double angle = 0; private double scale = 1; private double delta = 0.01; Rectangle.Float r = new Rectangle.Float(20, 20, 200, 200); public SwingTimerBasedAnimationScaleRotate() { timer = new Timer(10, this); timer.start(); } public void paint(Graphics g) {
Read Moreimport java.awt.Color; import java.awt.Dimension; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.RenderingHints; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.geom.Ellipse2D; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.Timer; public class TimerBasedAnimation extends JPanel implements ActionListener { private Ellipse2D.Float ellipse = new Ellipse2D.Float(); private double esize; private double maxSize = 0; private boolean initialize = true; Timer timer; ActionListener updateProBar; public TimerBasedAnimation() { setXY(20 * Math.random(), 200, 200);
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