矿大java实验三.doc

Java实验三计11-1班 梁绕绕 081133711.使用编写代码的方式，设计一个用户界面如下图所示：package shiyan;import java.awt.*;import javax.swing.*;import java.awt.event.ActionListener;import java. awt.event.ActionEvent;public class Computer public static void main(String args) JFrame f=new JFrame(计算器);f.setLayout(new FlowLayout();finalJTextField textfield1=new JTextField(15);finalJTextField textfield2=new JTextField(15);final JTextField textfield3=new JTextField(15); JButton button1=new JButton(+); JButton button2=new JButton(-);JButton button3=new JButton(*);JButton button4=new JButton(/);f.add(textfield1);f.add(textfield2);f.add(button1);f.add(button2);f.add(button3);f.add(button4);button1.setForeground(Color.RED);button2.setForeground(Color.GREEN);button3.setForeground(Color.pink);button4.setForeground(Color.BLUE);f.add(textfield3);f.setVisible(true);f.setBounds(100, 100,200, 160);f.setResizable(false);f.setDefaultCloseOperation(f.EXIT_ON_CLOSE);button1.addActionListener(new ActionListener()public void actionPerformed(ActionEvent event)String s1=textfield1.getText();String s2=textfield2.getText();double m1=Double.parseDouble(s1);double m2=Double.parseDouble(s2);double m3=m1+m2;String s3=String.valueOf(m3);/textfield3。setText(s3);textfield3.setText(s3););button2.addActionListener(new ActionListener()public void actionPerformed(ActionEvent event)String s1=textfield1.getText();String s2=textfield2.getText();double m1=Double.parseDouble(s1);double m2=Double.parseDouble(s2);double m3=m1-m2;String s3=String.valueOf(m3);/textfield3。setText(s3);textfield3.setText(s3););button3.addActionListener(new ActionListener()public void actionPerformed(ActionEvent event)String s1=textfield1.getText();String s2=textfield2.getText();double m1=Double.parseDouble(s1);double m2=Double.parseDouble(s2);double m3=m1*m2;String s3=String.valueOf(m3);/textfield3。setText(s3);textfield3.setText(s3););button4.addActionListener(new ActionListener()public void actionPerformed(ActionEvent event)String s1=textfield1.getText();String s2=textfield2.getText();double m1=Double.parseDouble(s1);double m2=Double.parseDouble(s2);double m3=m1/m2;String s3=String.valueOf(m3);/textfield3。setText(s3);textfield3.setText(s3););加法结果减法结果乘法结果除法结果2.2. 使用编写代码的方式，设计一个含有菜单的用户界面，如下图所示：package shiyan;import javax.swing.*;public class Select_class_system public static void main(String args) JFrame f=new JFrame(选课系统);JMenuBar menubar=new JMenuBar();JMenu menu1= new JMenu(文体类);JMenu menu2= new JMenu(计算机类);JMenu menu3= new JMenu(帮助);menubar.add(menu1);menubar.add(menu2);menubar.add(menu3);JMenuItem item1=new JMenuItem(艺术欣赏);JMenuItem item2=new JMenuItem(健美操);JMenuItem item3=new JMenuItem(篮球);JMenuItem item4=new JMenuItem(java语言);JMenuItem item5=new JMenuItem(网络编程);JMenuItem item6=new JMenuItem(选课方法);menu1.add(item1);menu1.add(item2);menu1.add(item3);menu2.add(item4);menu2.add(item5);menu3.add(item6);f.setJMenuBar(menubar);f.setSize(300, 300);f.setDefaultCloseOperation(f.EXIT_ON_CLOSE);f.setVisible(true);运行之后的结果：3.编写一个图形界面程序，运行后界面如下图，其中绘制矩形的方法是drawRect(40,50,120,80)。package shiyan;import javax.swing.*;import java.awt.*;public class Graph extends JFramepublic void paint(Graphics g)g.drawRect(40, 50, 120, 80);g.drawOval(40, 50, 120, 80);g.drawOval(40, 65, 100,60);g.drawOval(40, 80,60, 30);public static void main(String args) Graph f=new Graph();f.setBounds(100, 100, 250, 200);f.show();f.setDefaultCloseOperation(f.EXIT_ON_CLOSE);运行结果：4. j 编写画出笑脸(如下图左)的程序。 k 编写画出哭脸(如下图右)的程序。 l 编写“变脸”程序: 将1和2结合, 再加入一个事件处理程序mouseUp(),使程序运行后出现一张笑脸,鼠标点击一次则变成哭脸,再点击一次又变成笑脸,依次轮换。package shiyan;import javax.swing.*;import java.awt.Graphics;import java.awt.Canvas;import java.awt.event.MouseEvent;import java.awt.event.MouseListener;import java.awt.event.InputEvent;class Kick extends Canvas implements MouseListenerint p=0;public Kick()addMouseListener(this);/paint方法，当p=1时，画笑脸，其它时，画哭脸public void paint(Graphics g)if(p=1)g.drawString(笑!,20,50);g.drawOval(40, 40, 60, 120);g.drawArc(60,130,20,10,180,180);g.drawArc(50, 80, 15, 8, 0, 180);g.drawArc(80, 80, 15, 8, 0, 180);elseg.drawString(哭, 20, 50);g.drawOval(40, 40, 60, 120);g.drawArc(60,130,20,10,0,180);g.drawArc(50, 80, 15, 8, 0, 180);g.drawArc(80, 80, 15, 8, 0, 180);public void mousePressed(MouseEvent e)if(e.getModifiers()=InputEvent.BUTTON1_MASK)p=(1+p)%2;repaint();public class Change_face public static void main(String args)JFrame f=new JFrame(变脸);f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);f.setBounds(300, 300, 300, 300);f.setVisible(true);f.add(new Kick();f.validate();5. 编写一个Applet或JApplet，6. 实现一个小球沿抛物线移动，7. 到达地面时播放一个响声。8. （ 利用抛物线方程 y=a(x-b)2 计算小球 位置，b是小球离地面的最大高度 ）package shiyan;import java.applet.*;import java.awt.*;/import java.applet.AudioClip;public class Applet1 extends Applet implements Runnable int x=0;public void start()Thread t=new Thread(this);t.start();public void run() while(true) if(x = 1)&(x = 400) repaint(0,0,400,190); try Thread.sleep(100);catch(I