冯志霞201771010107《面向对象程序设计（java）》第十二周学习总结

import javax.swing.*;

public class SimpleFrameTest



   public static void main(String[] args)

   

     JFrame  frame = new JFrame(); //创建一个窗口

     frame.setBounds(500, 500,300, 200);//前两个int 指定位置，后两个int指定大小

     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//使得关闭按钮起作用

     frame.setVisible(true);  //可视化  

   

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);//调用父类实现的接口Component里面的方法，不需要生成对象
   

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(() ->
         
            JFrame frame = new SizedFrame();
            frame.setTitle("SizedFrame");
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.setVisible(true);
         );
   


class SizedFrame extends JFrame

   public SizedFrame()
   
      // get screen dimensions

      Toolkit kit = Toolkit.getDefaultToolkit();
      Dimension screenSize = kit.getScreenSize();
      int screenHeight = screenSize.height;
      int screenWidth = screenSize.width;

      // set frame width, height and let platform pick screen location

      setSize(screenWidth / 2, screenHeight / 2);//设置为用户屏幕的四分之一
      setLocationByPlatform(true);//没有这一句，还是按系统默认的位置显示即左上角

      // 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 = 500;
   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); 

//添加组件

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());//add()方法来自Jframe的父类container,用来添加组件
      pack();// 类 java.awt.Window 中的方法；用于调整此窗口的大小，以适合其子组件的首选大小和布局。 
   


/**
 * A component that displays rectangles and ellipses.
 */
class DrawComponent extends JComponent

   private static final int DEFAULT_WIDTH = 400;
   private static final int DEFAULT_HEIGHT = 500;

   public void paintComponent(Graphics g)
   
      Graphics2D g2 = (Graphics2D) g;//强制类型转换

      // draw a rectangle

      double leftX = 100;
      double topY = 100;
      double width = 200;
      double height = 150;

      Rectangle2D rect = new Rectangle2D.Double(leftX, topY, width, height);
      //这里的Rectangle2D.Double是Rectangle类的内置类
      g2.draw(rect);
    //java中所有的绘图操作都必须有graphics对象进行操作;
     

      Ellipse2D ellipse = new Ellipse2D.Double();
      
      ellipse.setFrame(rect);//创建一个椭圆
      g2.draw(ellipse);//将椭圆画出来
      g2.draw(new Line2D.Double(leftX, topY, leftX + width, topY + height));

      // draw a circle with the same center

      double centerX = rect.getCenterX();//getX() + getWidth() / 2.0;
      double centerY = rect.getCenterY();//getY() + getHeight() / 2.0;
      double radius = 150;
//以矩形中心为圆心半径为150画圆
      Ellipse2D circle = new Ellipse2D.Double();
      circle.setFrameFromCenter(centerX, centerY, centerX + radius, centerY + radius);
      g2.draw(circle);//画一个圆
   
   
  public Dimension getPreferredSize() //dimesions外形
	   return new Dimension(DEFAULT_WIDTH, DEFAULT_HEIGHT); //将框架以首选大小显示出来

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);//显示效果  new Font( 字体，风格， 字号);
      g2.setFont(f);

     

      FontRenderContext context = g2.getFontRenderContext();
     Rectangle2D bounds = f.getStringBounds(message, context);

      // set (x,y) = top left corner of text

      double x = (getWidth() - bounds.getWidth()) / 2;
      double y = (getHeight() - bounds.getHeight()) / 2;

      // add ascent to y to reach the baseline

      double ascent = -bounds.getY();
      double baseY = y + ascent;

      // draw the message

      g2.drawString(message, (int) x, (int) baseY);

      g2.setPaint(Color.LIGHT_GRAY);

      // 画出基线

      g2.draw(new Line2D.Double(x, baseY, x + bounds.getWidth(), baseY));

      // 
      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 = 500;
   private static final int DEFAULT_HEIGHT = 450;

   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);
      // 已默认值显示位置

      g.drawImage(image, 0, 0, null);
      // 在组件上平铺图像

      for (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); 

package 信息查询;

import java.awt.Button;
import java.awt.Color;
import java.awt.Frame;
import java.awt.Label;
import java.awt.Panel;
import java.awt.TextField;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JFrame;
public class container
	public static void main(String[] args)
	
	Frame container=new Frame();//容器
	Panel ban=new Panel();//面板
	Label a1=new Label("用户名");
	Label a2=new Label("密码   ");
	//标签
	TextField b1=new TextField("name");
	TextField b2=new TextField("password");
	//文本框
	Button n1=new Button("确定");
	//按钮
	ban.add(a1);
	ban.add(b1);
	ban.add(a2);
	ban.add(b2);
	ban.add(n1);
	container.add(ban);
	//container.setLocation(500,500);
	container.setBackground(Color.cyan);
	container.setSize(300, 300);
	container.setLocationRelativeTo(null);
	//container.isVisible(boolean)
	container.setVisible(true);
	container.setTitle("one simple window");
	39// ( (JFrame) container).setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	container.addWindowListener(new WindowAdapter() 
        public void windowClosing(WindowEvent e) 
            System.exit(0);
        
    );