实验8 图形界面程序设计

1、山西大学计算机与信息技术学院实验报告姓 名 学 号专业班级课程名称 Java实验实验日期成 绩指导教师 批改日期实验名称实验 8 图形界面程序设计一、实验目的掌握常用GUI控制组件及其事件处理。二、实验内容1编程包含一个标签和一个按钮，单击按钮时，标签的内容在“你好”和“再见”之间切换。程序代码：import java.awt.FlowLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.*;public class JButtonAndJLabel ex

2、tends JFrame private JButton click = new JButton(Click);private JLabel label = new JLabel();int a = 1;int b = 0;public JButtonAndJLabel() setLayout(new FlowLayout(FlowLayout.CENTER, 20, 20);add(click);add(label);click.addActionListener(new ButtonListener();private class ButtonListener implements Act

3、ionListener public void actionPerformed(ActionEvent e) String s1 = 你好！;String s2 = 再见！;label.setText(a = b ? s1 : s2);int t = a;a = b;b = t;public static void main(String args) JButtonAndJLabel frame = new JButtonAndJLabel();frame.setTitle(Click);frame.setSize(200, 100);frame.setLocationRelativeTo(n

4、ull);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true);运行结果贴图:2编程包含一个文本框和一个文本区域，文本框内容改变时，将文本框中的内容显示在文本区域中；在文本框中按回车键时，清空文本区域的内容。程序代码：import javax.swing.*;import javax.swing.text.*;import javax.swing.event.*;import java.awt.*;import java.awt.event.*;final class JTextFieldAndJ

5、TextAreaSample extends JFrame public String getTitle() return JTextFieldAndJTextAreaSample;static private final Dimension size = new Dimension(600, 400);public Dimension getPreferredSize() return size;public Dimension getMaximumSize() return size;public Dimension getMinimumSize() return size;public

6、Dimension getSize() return size;private static JTextField textField;private static JTextArea textArea;private static JLabel positionLabel0 = new JLabel() public Dimension getPreferredSize() return new Dimension(300, 35);public Dimension getMinimumSize() return new Dimension(300, 35);public Dimension

7、 getSize() return new Dimension(300, 35);private void init() textField = new JTextField() public Color getForeground() return Color.blue; public boolean lineWrap() return true; ; textArea = new JTextArea(3,20) public Color getForeground() return Color.magenta; public boolean isEditable() return fals

8、e; ; private void attachListeners() setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);textField.getDocument().addDocumentListener(new TextFieldChangeListener();private void doLay() setLayout(new BorderLayout();add(textField,BorderLayout.NORTH);add(textArea,BorderLayout.CENTER);pack();setVisible(true);p

9、rivate static class TextFieldChangeListener implements DocumentListener public void changedUpdate(DocumentEvent e) echo(e.getDocument();public void insertUpdate(DocumentEvent e) echo(e.getDocument();public void removeUpdate(DocumentEvent e) echo(e.getDocument();private static void echo(Document d) t

10、ry textArea.setText(d.getText(0, d.getLength(); catch (BadLocationException e1) e1.printStackTrace();JTextFieldAndJTextAreaSample() throws HeadlessException init();attachListeners();doLay();public static void main(String args) new JTextFieldAndJTextAreaSample();运行结果贴图:3编程包含一个复选按钮和一个普通按钮，复选按钮选中时，普通按钮

11、的背景色为青色，未选中时为灰色。程序代码：import java.awt.Color;import java.awt.FlowLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.*;public class ButtonColor extends JFrame private JRadioButton radioButton = new JRadioButton(RadioButton);private static JButton button = n

12、ew JButton(Button);int a = 1;int b = 0;public ButtonColor() setLayout(new FlowLayout(FlowLayout.CENTER, 20, 20);add(radioButton);add(button);radioButton.addActionListener(new ButtonListener();private class ButtonListener implements ActionListener public void actionPerformed(ActionEvent e) button.set

13、Background(a b ? Color.cyan : Color.gray);int t = a;a = b;b = t;public static void main(String args) ButtonColor frame = new ButtonColor();button.setBackground(Color.gray);frame.setTitle(Click);frame.pack();frame.setLocationRelativeTo(null);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.

14、setVisible(true);运行结果贴图:4编程包含两个按钮和一个标签，将发生单击事件的按钮上的文本信息显示在标签中。提示：关键代码如下： b1.addActionListener(new B1(); b2.addActionListener(new B2(); class B1 implements ActionListener public void actionPerformed(ActionEvent e) who.setText(Button 1); class B2 implements ActionListener public void actionPerformed(A

15、ctionEvent e) who.setText(Button 2); 程序代码：import java.awt.FlowLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;public class JButtonAndJLabelText extends JFrame private JButton b1 = new JButton

16、(b1);private JButton b2 = new JButton(b2);private JLabel who = new JLabel();public JButtonAndJLabelText() setLayout(new FlowLayout(FlowLayout.CENTER, 20, 20);who.setSize(80, 20);add(b1);add(who);add(b2);b1.addActionListener(new B1();b2.addActionListener(new B2();private class B1 implements ActionLis

17、tener public void actionPerformed(ActionEvent e) who.setText(Button 1);private class B2 implements ActionListener public void actionPerformed(ActionEvent e) who.setText(Button 2);public static void main(String args) JButtonAndJLabelText frame = new JButtonAndJLabelText();frame.setTitle(ClickButton);

18、frame.setSize(240, 100);frame.setLocationRelativeTo(null);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true);运行结果贴图:5编程确定当前鼠标的位置坐标。程序代码：import javax.swing.*;import java.awt.*;import java.awt.event.*;public class MousePosition extends JFrame private JLabel jbl = new JLabel();

19、private JPanel p = new JPanel();public static void main(String args) MousePosition frame = new MousePosition();frame.setSize(300,300);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true);public MousePosition()p.add(jbl);add(p);p.addMouseMotionListener(new MouseMotionAdapter()p

20、ublic void mouseMoved(MouseEvent e) int x = e.getX(); int y = e.getY(); jbl.setBounds(x,y,60,20); jbl.setText(+x+,+y+););运行结果贴图:6编程使用BorderLayout布局方式放置5个按钮。程序代码：import java.awt.BorderLayout;import javax.swing.*;public class BorderLayoutButton extends JFrame public BorderLayoutButton() this.setLayout

21、(new BorderLayout(20, 20);add(new JButton(Button1), BorderLayout.NORTH);add(new JButton(Button2), BorderLayout.WEST);add(new JButton(Button3), BorderLayout.CENTER);add(new JButton(Button4), BorderLayout.EAST);add(new JButton(Button5), BorderLayout.SOUTH);public static void main(String args) BorderLa

22、youtButton frame = new BorderLayoutButton();frame.setTitle(BorderLayoutButton);frame.setSize(300, 200);frame.setLocationRelativeTo(null);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true);运行结果贴图:7. 编写程序，实现使用键盘上的上下左右箭头控制界面上图片的移动。移动到边界时从界面另一侧出现。移动过程中显示另一个图片，停止时恢复原来的图片。程序代码：imp

23、ort javax.swing.*;import java.awt.*;import java.awt.event.*;public class Move extends JFrame private Icon icon1 = new ImageIcon(E:/Ok1.jpg); private Icon icon2 = new ImageIcon(E:/Ok2.jpg); private JPanel p = new JPanel(); private JLabel jlb; public static void main(String args) Move frame = new Move

24、();frame.setSize(500,500);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true); public Move() jlb = new JLabel(icon1); jlb.setBounds(0,0,30,30); p.add(jlb); add(p); addKeyListener(new KeyAdapter() public void keyPressed(KeyEvent e) jlb.setIcon(icon2); int x = jlb.getX(); int y

25、 = jlb.getY(); int w = p.getWidth(); int h = p.getHeight(); switch(e.getKeyCode() case KeyEvent.VK_DOWN: y+=10; jlb.setBounds(x,y,30,30); if(y=h) y=0; y+=10; jlb.setBounds(x,y,30,30); break; case KeyEvent.VK_UP: y-=100; if(y=0) y=h; jlb.setBounds(x,y,30,30); else jlb.setBounds(x,y,30,30); break; cas

26、e KeyEvent.VK_LEFT: x-=100; if(x=w) x=0; jlb.setBounds(x,y,30,30); else jlb.setBounds(x,y,30,30); break; default: int i= 0; public void keyReleased(KeyEvent e) jlb.setIcon(icon1); ); 运行结果贴图:停止运动：运动过程中：课后作业P344 12.1 12.3 12.4 2.5 12.7 12.12 P426 15.1 15.3P455 16.2 16.3 16.5 16.6 16.712.1java.awt.Componen是Java GUI组件类的根；容器类是Component的子类；JCompon