import javax.swing.*;
public class SimpleFrameTest
{public static void main(String[] args){JFrame  frame = new JFrame(); frame.setBounds(0, 0,300, 200);//设置窗口的位置，长宽frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//设置用户在此窗体上发起 "close" 时默认执行的操作frame.setVisible(true);//设置窗口是否可见
   }
}

package simpleFrame;import java.awt.*;
import javax.swing.*;/*** @version 1.33 2015-05-12* @author Cay Horstmann*/
public class SimpleFrameTest {public static void main(String[] args) {EventQueue.invokeLater(() -> {SimpleFrame frame = new SimpleFrame();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true);});}
}class SimpleFrame extends JFrame {private static final int DEFAULT_WIDTH = 300;private static final int DEFAULT_HEIGHT = 200;public SimpleFrame() {setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);}
}

package sizedFrame;import java.awt.*;
import javax.swing.*;/*** @version 1.34 2015-06-16* @author Cay Horstmann*/
public class SizedFrameTest {public static void main(String[] args) {EventQueue.invokeLater(() -> // lambda表达式
        {JFrame frame = new SizedFrame();frame.setTitle("SizedFrame");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);// 设置用户在此窗体上发起 "close" 时默认执行的操作frame.setVisible(true);// 设置窗口可见
        });}
}class SizedFrame extends JFrame {public SizedFrame() {// get screen dimensions
Toolkit kit = Toolkit.getDefaultToolkit();// 生成Toolkit对象Dimension screenSize = kit.getScreenSize();// 返回Dimension对象的屏幕大小int screenHeight = screenSize.height;// 获得Dimension对象屏幕的高度int screenWidth = screenSize.width;// 获得Dimension对象屏幕的宽度// set frame width, height and let platform pick screen location
setSize(screenWidth / 2, screenHeight / 2);// 调整组件的大小setLocationByPlatform(true);// 设置窗口下次可见时应该出现的位置// set frame icon
Image img = new ImageIcon("icon.gif").getImage();setIconImage(img);// 设置要作为此窗口图标显示的图像
    }
}

package notHelloWorld;import javax.swing.*;
import java.awt.*;/*** @version 1.33 2015-05-12* @author Cay Horstmann*/
public class NotHelloWorld {public static void main(String[] args) {EventQueue.invokeLater(() -> {JFrame frame = new NotHelloWorldFrame();frame.setTitle("NotHelloWorld");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true);});}
}/*** A frame that contains a message panel*/
class NotHelloWorldFrame extends JFrame {public NotHelloWorldFrame() {add(new NotHelloWorldComponent());pack();}
}/*** A component that displays a message.*/
class NotHelloWorldComponent extends JComponent {public static final int MESSAGE_X = 75;public static final int MESSAGE_Y = 100;private static final int DEFAULT_WIDTH = 300;private static final int DEFAULT_HEIGHT = 200;public void paintComponent(Graphics g) {g.drawString("Not a Hello, World program", MESSAGE_X, MESSAGE_Y);}public Dimension getPreferredSize() {return new Dimension(DEFAULT_WIDTH, DEFAULT_HEIGHT);}
}

package draw;import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;/*** @version 1.33 2007-05-12* @author Cay Horstmann*/
public class DrawTest {public static void main(String[] args) {EventQueue.invokeLater(() -> {JFrame frame = new DrawFrame();frame.setTitle("DrawTest");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true);});}
}/*** A frame that contains a panel with drawings*/
class DrawFrame extends JFrame {public DrawFrame() {add(new DrawComponent());pack();}
}/*** A component that displays rectangles and ellipses.*/
class DrawComponent extends JComponent {private static final int DEFAULT_WIDTH = 400;private static final int DEFAULT_HEIGHT = 400;public void paintComponent(Graphics g) {Graphics2D g2 = (Graphics2D) g;// draw a rectangledouble leftX = 100;double topY = 100;double width = 200;double height = 150;Rectangle2D rect = new Rectangle2D.Double(leftX, topY, width, height);g2.draw(rect);// draw the enclosed ellipse
Ellipse2D ellipse = new Ellipse2D.Double();ellipse.setFrame(rect);g2.draw(ellipse);// draw a diagonal line
g2.draw(new Line2D.Double(leftX, topY, leftX + width, topY + height));// draw a circle with the same centerdouble centerX = rect.getCenterX();double centerY = rect.getCenterY();double radius = 150;Ellipse2D circle = new Ellipse2D.Double();circle.setFrameFromCenter(centerX, centerY, centerX + radius, centerY + radius);g2.draw(circle);}public Dimension getPreferredSize() {return new Dimension(DEFAULT_WIDTH, DEFAULT_HEIGHT);}
}

package font;import java.awt.*;
import java.awt.font.*;
import java.awt.geom.*;
import javax.swing.*;/*** @version 1.34 2015-05-12* @author Cay Horstmann*/
public class FontTest {public static void main(String[] args) {EventQueue.invokeLater(() -> {JFrame frame = new FontFrame();frame.setTitle("FontTest");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true);});}
}/*** A frame with a text message component*/
class FontFrame extends JFrame {public FontFrame() {add(new FontComponent());pack();}
}/*** A component that shows a centered message in a box.*/
class FontComponent extends JComponent {private static final int DEFAULT_WIDTH = 300;private static final int DEFAULT_HEIGHT = 200;public void paintComponent(Graphics g) {Graphics2D g2 = (Graphics2D) g;String message = "Hello, World!";Font f = new Font("Serif", Font.BOLD, 36);g2.setFont(f);// measure the size of the message
FontRenderContext context = g2.getFontRenderContext();Rectangle2D bounds = f.getStringBounds(message, context);// set (x,y) = top left corner of textdouble x = (getWidth() - bounds.getWidth()) / 2;double y = (getHeight() - bounds.getHeight()) / 2;// add ascent to y to reach the baselinedouble ascent = -bounds.getY();double baseY = y + ascent;// draw the message
g2.drawString(message, (int) x, (int) baseY);g2.setPaint(Color.LIGHT_GRAY);// draw the baseline
g2.draw(new Line2D.Double(x, baseY, x + bounds.getWidth(), baseY));// draw the enclosing rectangle
Rectangle2D rect = new Rectangle2D.Double(x, y, bounds.getWidth(), bounds.getHeight());g2.draw(rect);}public Dimension getPreferredSize() {return new Dimension(DEFAULT_WIDTH, DEFAULT_HEIGHT);}
}

package image;import java.awt.*;
import javax.swing.*;/*** @version 1.34 2015-05-12* @author Cay Horstmann*/
public class ImageTest {public static void main(String[] args) {EventQueue.invokeLater(() -> {JFrame frame = new ImageFrame();frame.setTitle("ImageTest");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true);});}
}/*** A frame with an image component*/
class ImageFrame extends JFrame {public ImageFrame() {add(new ImageComponent());pack();}
}/*** A component that displays a tiled image*/
class ImageComponent extends JComponent {private static final int DEFAULT_WIDTH = 350;private static final int DEFAULT_HEIGHT = 250;private Image image;public ImageComponent() {image = new ImageIcon("blue-ball.gif").getImage();}public void paintComponent(Graphics g) {if (image == null)return;int imageWidth = image.getWidth(null);int imageHeight = image.getHeight(null);// draw the image in the upper-left corner
g.drawImage(image, 0, 0, null);// tile the image across the componentfor (int i = 0; i * imageWidth <= getWidth(); i++)for (int j = 0; j * imageHeight <= getHeight(); j++)if (i + j > 0)g.copyArea(0, 0, imageWidth, imageHeight, i * imageWidth, j * imageHeight);}public Dimension getPreferredSize() {return new Dimension(DEFAULT_WIDTH, DEFAULT_HEIGHT);}
}