Java web 第一天

最新推荐文章于 2025-12-17 15:03:56 发布

原创最新推荐文章于 2025-12-17 15:03:56 发布 · 411 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#java #前端

文本框代码：

package Demo01;

import java.awt.BorderLayout;
import java.awt.Container;

import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.WindowConstants;
//文本框
public class TestTextDemo01 extends JFrame{
   public TestTextDemo01() {
           Container container = this.getContentPane();

       JTextField textfield = new JTextField("Hello");
       JTextField textfield2 = new JTextField("大数据5班鲜陈");

       container.add(textfield,BorderLayout.NORTH);
       container.add(textfield2,BorderLayout.SOUTH);

       this.setVisible(true);
       this.setSize(500, 350);
       this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
   }
   public static void main(String[] args) {
       new TestTextDemo01();
   }
}
成果如图：

密码框代码:

package Demo01;

import java.awt.BorderLayout;
import java.awt.Container;

import javax.swing.JFrame;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.WindowConstants;

public class Demo01 extends JFrame{
   public Demo01() {
   Container container = this.getContentPane();

       JPasswordField passwordField = new JPasswordField();
       passwordField.setEchoChar('^');

       container.add(passwordField);

       this.setVisible(true);
       this.setSize(500, 350);
       this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
   }

   public static void main(String[] args) {
       new Demo01();
   }

}

成果如图：

二，事件的类型和处理方法
AWT和Swing定义了多种类型的事件，这些事件大致可分为以下两大类型。
（1）低级事件。
这类事件指由窗口系统发生的事件或者底层输入而产生的事件，主要包括组件事件（跟踪组件位置、大小可见性的变化）、容器事件（反应容器中组件的添加和删除）、焦点事件（组件获得或失去键盘焦点，拥有键盘的组件可响应键盘的输入）、窗口事件（反映窗口或对话框的基本状态）、鼠标事件（用户使用鼠标进行交互）、键盘事件（用户使用键盘进行输入）等。
（2）语义事件。
这类事件是指低级事件以外的具有丰富含义的与组件有关的事件，如单击按钮、滚拖动滚动条等。这些世界源于图形用户界面，其含义由程序设计员赋予，如单击“确定”按钮将确认刚才的操作。按“取消”按钮将撤销刚才的操作。

动作监听代码:

package Demo01;

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JFrame;
import javax.swing.WindowConstants;

public class Demo01 {
    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setSize(400, 400);
        frame.locate(400, 300);

        MyActionListener myactionListener = new MyActionListener();
        Button button = new Button();

        button.addActionListener(myactionListener);
        frame.add(button,BorderLayout.CENTER);
        frame.pack();
        frame.setVisible(true);
        frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
}
class MyActionListener implements ActionListener{

    @Override
    public void actionPerformed(ActionEvent e) {
        System.out.println("大数据5班 ");
    }

}

TextActionTwo代码如下:

package Demo02;

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;
import javax.swing.WindowConstants;

public class TextActionTwo {
   public static void main(String[] args) {
       JFrame frame = new JFrame("开始---停止");
       frame.setSize(400, 400);
       frame.locate(400, 300);
       Button button1 = new Button("start");
       Button button2 = new Button("stop");

       //动作监听
       MyMonitor myMonitor = new MyMonitor();

       button1.addActionListener(myMonitor);
       button2.addActionListener(myMonitor);

       frame.add(button1,BorderLayout.NORTH);
       frame.add(button2,BorderLayout.SOUTH);

       frame.pack();
       frame.setVisible(true);
       frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
   }
}
class MyMonitor implements ActionListener{

   @Override
   public void actionPerformed(ActionEvent e) {
       System.out.println("大数据5班-->"+e.getActionCommand());
       if(e.getActionCommand().equals("stop")) {
           System.out.println("游戏开始");
       }else {
           System.out.println("游戏结束！");
       }
   }

}

成果如图：

文本域代码:

package Demo02;

import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;

import com.sun.jdi.Field;
//文本域
public class TextText01 {
   public static void main(String[] args) {
       new MyFrame();
   }
}
class MyFrame extends JFrame{

   public MyFrame() {

       TextField txetField = new TextField();
       this.add(txetField);

       MyActionListener2 myActionListener2 = new MyActionListener2();
       txetField.addActionListener(myActionListener2);

       //文本域
       txetField.setEchoChar('%');
       this.setVisible(true);
       this.pack();
       this.setDefaultCloseOperation(EXIT_ON_CLOSE);
   }

}
class MyActionListener2 implements ActionListener{

   @Override
   public void actionPerformed(ActionEvent e) {
       TextField field = (TextField) e.getSource();
       System.out.println(field.getText());
       field.setText("");
   }

}

成果如图：

键盘事件代码:

package Demo03;

import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

import javax.swing.JFrame;

public class TestKeyListener {
   public static void main(String[] args) {
       new KeyFrame();
   }

}
class KeyFrame extends JFrame{
   public KeyFrame() {
       this.setBounds(10, 20, 300, 400);
       this.setVisible(true);
       this.setDefaultCloseOperation(EXIT_ON_CLOSE);
       this.addKeyListener(
               new KeyAdapter() {
                   @Override
                   public void keyPressed(KeyEvent e) {
                       int keycode=e.getKeyCode();
                       System.out.println(keycode);
                       if(keycode==KeyEvent.VK_UP) {
                           System.out.println("您按下了上键");
                       }if(keycode==KeyEvent.VK_W) {
                           System.out.println("您按下了下键");
                       }
                   }
       });
   }
}

成果如图：

窗口代码:

package Demo03;

import java.awt.Color;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JFrame;

public class TestWindow {
   public static void main(String[] args) {
       new WindowFrame();
   }
}
class WindowFrame extends JFrame{
   public WindowFrame() {
       this.setBackground(Color.cyan);
       this.setBounds(166, 200, 300, 400);
       this.setVisible(true);
       //this.setDefaultCloseOperation(EXIT_ON_CLOSE);
       //this.addWindowListener(new MyWindowListener());//匿名类

       this.addWindowListener(
               new WindowAdapter() {
                   //匿名内部类
                   @Override
                   public void windowClosing(WindowEvent e) {
                       super.windowClosing(e);
                       setVisible(false);//设置不可见
                       System.out.println("我要关闭");
                       //System.exit(0);
                   }
                   @Override
                   public void windowActivated(WindowEvent e) {
                       super.windowActivated(e);
                   System.out.println("windowActivated");
               }
               @Override
                   public void windowClosed(WindowEvent e) {
                       super.windowClosed(e);
                   System.out.println("windowClosed");
                   }
                   @Override
                   public void windowOpened(WindowEvent e) {
                       super.windowOpened(e);
                   System.out.println("windowOpened");
                   }

               }
       );
   }
}
成果如图：

鼠标事件代码:

package Demo03;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;

import javax.swing.JFrame;
import javax.swing.text.html.HTMLDocument.Iterator;

public class TestMouseListener {
   public static void main(String[] args) {
       new MyFrame("我的画图");
   }
}
class MyFrame extends JFrame{
   ArrayList points;
   public MyFrame(String title) {
       super(title);

       this.setBounds(200, 200, 400, 400);
       this.setVisible(true);
       this.setDefaultCloseOperation(EXIT_ON_CLOSE);
       points=new ArrayList<>();
       this.addMouseListener(new MyMouseListener());
   }
   public void paint(Graphics g) {

       java.util.Iterator iterator = points.iterator();
       while(iterator.hasNext()) {
           Point point=(Point)iterator.next();
           g.setColor(Color.cyan);
           g.fillOval(point.x, point.y, 10, 20);
       }
   }

   public void addPaint(Point point) {
       points.add(point);
   }
   private class MyMouseListener extends MouseAdapter{
       @Override
       public void mousePressed(MouseEvent e) {
           MyFrame myFrame=(MyFrame) e.getSource();
           System.out.println("x坐标："+e.getX()+"y坐标："+e.getY());
           myFrame.addPaint(new Point(e.getX(),e.getY()));
           myFrame.repaint();
       }
   }
}