java程序设计教程部分答案3.doc

Pp5.15统计元音字母个数package Statistics_aeiou;import java.awt.Dimension;import java.awt.Toolkit;import javax.swing.JFrame;public class Statistics public static void main(String args) JFrame frame=new JFrame(元音字母统计柱状图);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setSize(500,500);Dimension screenSize=Toolkit.getDefaultToolkit().getScreenSize();int x=(screenSize.width-frame.getWidth()/2;int y=(screenSize.height-frame.getHeight()/2;frame.setLocation(x, y);AeiouPanel panel=new AeiouPanel();frame.getContentPane().add(panel);frame.pack();frame.setVisible(true);package Statistics_aeiou;import java.awt.BorderLayout;import java.awt.Color;import java.awt.Component;import java.awt.Dimension;import java.awt.FlowLayout;import java.awt.Graphics;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.Box;import javax.swing.BoxLayout;import javax.swing.JButton;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JTextField;public class AeiouPanel extends JPanelprivate JLabel input,label1,label2,label3,label4,label5,label6;private JTextField text;private JButton sure,exit;private JPanel panel,panel1;private final int N=60,WITH=30;public AeiouPanel()input =new JLabel(Input Character:);text =new JTextField(15);sure =new JButton(确定);exit =new JButton(退出);panel =new JPanel();panel1 =new JPanel();label1=new JLabel(a:);label2=new JLabel(e:);label3=new JLabel(i:);label4=new JLabel(o:);label5=new JLabel(u:);label6=new JLabel(其它字符:);AeiouListener listener=new AeiouListener();sure.addActionListener(listener);exit.addActionListener(listener);panel.setLayout(new FlowLayout();panel.setBackground(Color.cyan);panel.add(input);panel.add(text);panel.add(sure);panel.add(exit);panel1.setLayout(new BoxLayout(panel1,BoxLayout.Y_AXIS);panel1.setBackground(Color.cyan);panel1.add(label1);panel1.add(Box.createRigidArea(new Dimension(0,20);panel1.add(label2);panel1.add(Box.createRigidArea(new Dimension(0,20);panel1.add(label3);panel1.add(Box.createRigidArea(new Dimension(0,20);panel1.add(label4);panel1.add(Box.createRigidArea(new Dimension(0,20);panel1.add(label5);panel1.add(Box.createRigidArea(new Dimension(0,20);panel1.add(label6);setLayout(new BorderLayout();add(panel,BorderLayout.NORTH);add(panel1,BorderLayout.EAST);setBackground(Color.cyan);setPreferredSize(new Dimension(500,500);private class AeiouListener implements ActionListenerpublic void actionPerformed(ActionEvent e)if(e.getSource()=sure)repaint();if(e.getSource()=exit)System.exit(0);public void paintComponent(Graphics page)super.paintComponent(page);String a=text.getText();int j=0,l=0,m=0,n=0,k=0,p=0;for(int i=0;ia.length();i+)switch(a.charAt(i)case a:j+;break;case e:l+;break;case i:m+;break;case o:n+;break;case u:p+;break;default:k+;label1.setText(a:+j);label2.setText(e:+l);label3.setText(i:+m);label4.setText(o:+n);label5.setText(u:+p);label6.setText(其它字符:+k);int x=50,y=50,x1=75;page.setColor(Color.black);page.drawLine(x, 400, 450, 400);page.setColor(Color.black);page.drawLine(x, y, x, 400);page.setColor(Color.red);page.fillRect(x1, 400-10*j,WITH, 10*j);page.setColor(Color.blue);page.fillRect(x1+N, 400-10*l,WITH, 10*l);page.setColor(Color.green);page.fillRect(x1+2*N, 400-10*m,WITH, 10*m);page.setColor(Color.yellow);page.fillRect(x1+3*N, 400-10*n,WITH, 10*n);page.setColor(Color.gray);page.fillRect(x1+4*N, 400-10*p,WITH, 10*p);page.setColor(Color.pink);page.fillRect(x1+5*N, 400-10*k,WITH, 10*k);运行界面截图：输入前界面：输入后界面：Pp5.22画100个随机圆。package DrawCircle;import java.awt.Dimension;import java.awt.Toolkit;import javax.swing.JFrame;public class DrawCircle public static void main(String args) JFrame frame=new JFrame(Circles);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setSize(350,375);Dimension screenSize=Toolkit.getDefaultToolkit().getScreenSize();int x=(screenSize.width-frame.getWidth()/2;int y=(screenSize.height-frame.getHeight()/2;frame.setLocation(x, y);CirclePanel panel=new CirclePanel();frame.getContentPane().add(panel);frame.pack();frame.setVisible(true);package DrawCircle;import java.awt.BorderLayout;import java.awt.Color;import java.awt.Dimension;import java.awt.Graphics;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.util.Random;import javax.swing.Box;import javax.swing.BoxLayout;import javax.swing.JButton;import javax.swing.JPanel;import DrawCircle1.CirclePanel1.CircleListner;public class CirclePanel extends JPanelprivate static final long serialVersionUID = 1L;private final int NUMCIRCLES=100,MAXRADIOUS=100;private final int MAX_X=250,MAX_Y=250;private Random generator;private JButton again,exit;private JPanel panel;public CirclePanel()generator=new Random();again=new JButton(again);exit=new JButton(exit);panel=new JPanel();panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS);panel.add(again);panel.add(Box.createHorizontalGlue();panel.add(exit);panel.setBackground(Color.green);setLayout(new BorderLayout();add(panel,BorderLayout.SOUTH);CircleListner listener=new CircleListner();again.addActionListener(listener);exit.addActionListener(listener);setBackground(Color.green);setPreferredSize(new Dimension(350,375);public class CircleListner implements ActionListenerpublic void actionPerformed(ActionEvent event)if(event.getSource()=again)repaint();if(event.getSource()=exit)System.exit(0);public void paintComponent(Graphics page)super.paintComponent(page);int x,y,radious;for(int count=0;countNUMCIRCLES;count+)x=generator.nextInt(MAX_X)+1;y=generator.nextInt(MAX_Y)+1;radious=generator.nextInt(MAXRADIOUS)+1;if(radious=35)page.setColor(Color.blue);page.drawOval(x, y, radious, radious);elseif(radious=70)page.setColor(Color.yellow);page.drawOval(x, y, radious, radious);elsepage.setColor(Color.red);page.drawOval(x, y, radious, radious);运行界面截图Pp5.29画点。package DrawDots;import java.awt.Dimension;import java.awt.Toolkit;import javax.swing.JFrame;public class DrawDots public static void main(String args) JFrame frame=new JFrame();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setSize(500,500);Dimension screenSize=Toolkit.getDefaultToolkit().getScreenSize();int x=(screenSize.width-frame.getWidth()/2;int y=(screenSize.height-frame.getHeight()/2;frame.setLocation(x, y);DotPanel panel=new DotPanel();frame.getContentPane().add(panel);frame.pack();frame.setVisible(true);package DrawDots;import java.awt.BorderLayout;import java.awt.Color;import java.awt.Dimension;import java.awt.Graphics;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.util.Random;import javax.swing.Box;import javax.swing.BoxLayout;import javax.swing.JButton;import javax.swing.JPanel;import DrawCircle1.CirclePanel1.CircleListner;public class DotPanel extends JPanel/* * */private static final long serialVersionUID = 1L;private final int MAXDOTS=20000,BOUNDARY=250,MAXSIDE=500,WIDTH=1;private Random generator;private JButton again,exit;private JPanel panel;public DotPanel()generator=new Random();again=new JButton(again);exit=new JButton(exit);panel=new JPanel();panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS);panel.add(again);panel.add(Box.createHorizontalGlue();panel.add(exit);panel.setBackground(Color.cyan);setLayout(new BorderLayout();add(panel,BorderLayout.SOUTH);DotListner listener=new DotListner();again.addActionListener(listener);exit.addActionListener(listener);setBackground(Color.cyan);setPreferredSize(new Dimension(500,500);public class DotListner implements ActionListenerpublic void actionPerformed(ActionEvent event)if(event.getSource()=again)repaint();if(event.getSource()=exit)System.exit(0);public void paintComponent(Graphics page)super.paintComponent(page);int x,y;for(int i=0;iMAXDOTS;i+)x=generator.nextInt(MAXSIDE)+1;y=generator.nextInt(MAXSIDE)+1;if(x=BOUNDARY)page.setColor(Color.red);page.fillRect(x, y, WIDTH, WIDTH);elsepage.setColor(Color.green);page.fillRect(x, y, WIDTH, WIDTH);运行界面截图：Pp5.30画10个随机圆。package DrawCircle1;import java.awt.Dimension;import java.awt.Toolkit;import javax.swing.JFrame;public class DrawCircle1 public static void main(String args) JFrame frame=new JFrame(Circles);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setSize(350,450);Dimension screenSize=Toolkit.getDefaultToolkit().getScreenSize();int x=(screenSize.width-frame.getWidth()/2;int y=(screenSize.height-frame.getHeight()/2;frame.setLocation(x, y);CirclePanel1 panel=new CirclePanel1();frame.getContentPane().add(panel);frame.pack();frame.setVisible(true);package DrawCircle1;import java.awt.BorderLayout;import java.awt.Color;import java.awt.Dimension;import java.awt.Graphics;import java.util.Random;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.Box;import javax.swing.BoxLayout;import javax.swing.JButton;import javax.swing.JPanel;public class CirclePanel1 extends JPanelprivate final int NUMCIRCLES=10,MAXRADIOUS=100;private final int MAX_X=250,MAX_Y=250;private Random generator;private JButton again,exit;private JPanel panel;public CirclePanel1()generator=new Random();again=new JButton(again);exit=new JButton(exit);panel=new JPanel();panel.setLayout(new BoxLayout(panel, BoxLayout.X_AXIS);panel.add(again);panel.add(Box.createHorizontalGlue();panel.add(exit);panel.setBackground(Color.cyan);setLayout(new BorderLayout();add(panel,BorderLayout.SOUTH);CircleListner listener=new CircleListner();again.addActionListener(listener);exit.addActionListener(listener);setBackground(Color.cyan);setPreferredSize(new Dimension(350,400);public class CircleListner implements ActionListenerpublic void actionPerformed(ActionEvent event)if(event.getSource()=again)repaint();if(event.getSource()=exit)System.exit(0);public void paintComponent(Graphics page)super.paintComponent(page);int x,y;int radious=new int10;for(int i=0;iNUMCIRCLES;i+)radiousi=generator.nextInt(MAXRADIOUS)+1;int MAX;for(int i=0;iNUMCIRCLES;i+)MAX=radious0;for(i=1;iNUMCIRCLES;i+)if(MAXradiousi)MAX=radiousi;for( i=0;iNUMCIRCLES;i+)x=generator.nextInt(MAX_X)+1;y=generator.nextInt(MAX_Y)+1;if(radiousi=MAX)page.setColor(Color.red);page.fillOval(x, y, MAX, MAX);elsepage.setColor(Color.blue);page.drawOval(x, y, radiousi, radiousi);运行界面截图：Pp5.35字体大小。package StyleOptions;import java.awt.Dimension;import java.awt.Toolkit;import javax.swing.JFrame;public class StyleOptions public static void main(String args) JFrame frame =new JFrame();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setSize(400, 400);Dimension screenSize=Toolkit.getDefaultToolkit().getScreenSize();int x=(screenSize.width-frame.getWidth()/2;int y=(screenSize.height-frame.getHeight()/2;frame.setLocation(x, y);StyleOptionsPanel panel=new StyleOptionsPanel();frame.getContentPane().add(panel);frame.pack();frame.setVisible(true);package StyleOptions;import java.awt.*;import javax.swing.*;import javax.swing.border.EmptyBorder;import java.awt.event.*;public class StyleOptionsPanel extends JPanel/* * */private static final long serialVersionUID = 1L;private JLabel saying,writing;private JCheckBox bold,italic;private JButton sure,exit;private JTextField text;private JPanel panel,panel1;private int size = 36;public StyleOptionsPanel()saying=new JLabel(Say it with style!);saying.setFont (new Font(Helvetica,Font.PLAIN,size);bold=new JCheckBox(Bold);bold.setBackground(Color.cyan);italic=new JCheckBox(Italic);italic.setBackground(Color.cyan);writing=new JLabel(Size);text=new JTextField(2);sure=new JButton(确定);exit=new JButton(退出);panel=new JPanel();panel1=new JPanel();StyleListener listener =new StyleListener();bold.addActionListener(listener);italic.addActionListener(listener);sure.addActionListener(listener);exit.addActionListener(listener);setLayout(new BoxLayout(this,BoxLayout.X_AXIS);panel.setLayout(new BoxLayout(panel,BoxLayout.Y_AXIS);panel1.setLayout(new FlowLayout(FlowLayout.CENTER);panel1.add(text);panel1.add(writing);panel1.setBackground(Color.cyan);panel.add(bold);panel.add(Box.createVerticalGlue();panel.add(italic);panel.add(Box.createVerticalGlue();panel.add(panel1);panel.add(sure);panel.add(Box.createVerticalGlue();panel.add(exit);panel.setBackground(Color.cyan);add(Box.createRigidArea(new Dimension(50,0);add(saying);add(Box.createHorizontalGlue();add(panel);setBackground(Color.cyan);setPreferredSize(new Dimension(400,200);private class StyleListener implements ActionListenerpublic void actionPerformed(ActionEvent event) int style=Font.PLAIN;String a=text.getText();if(bold.isSelected()style=Font.BOLD;if(italic.isSelected()style+=Font.ITALIC;if(event.getSource()=sure)size=Integer.parseInt(a);saying.setFont(new Font(Helvetica,style,size);if(event.getSource()=exit)System.exit(0);运行界面截图：小风扇package DrawArcs;import javax.swing.*;import java.awt.*;public class DrawArcs extends JFrameprivate static final long serialVersionUID = 1L;public DrawArcs() setTitle(DrawArcs); getContentPane().add(new ArcsPanel(); public static void main(String args) DrawArcs frame = new DrawArcs(); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.setSize(550, 500); Dimension screenSize=Toolkit.getDefaultToolkit().getScreenSize(); int x=(screenSize.width-frame.getWidth()/2; int y=(screenSize.height-frame.getHeight()/2; frame.setLocation(x,y); frame.setVisible(true); package DrawArcs;import java.awt.BorderLayout;import java.awt.Color;import java.awt.Dimension;import java.awt.FlowLayout;import java.awt.Graphics;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.Box;import javax.swing.BoxLayout;import javax.swing.JButton;import javax.swing.JLabel;import javax.swing.JPanel;import javax.swing.JSlider;import javax.swing.Timer;import javax.swing.event.ChangeEvent;import javax.swing.event.ChangeListener;public class ArcsPanel extends JPanelprivate static final long serialVersionUID = 1L;private Timer timer1,timer2;private JButton start,end,up,down,converse,exit;private JSlider slid;private JLabel label;private JPanel panel1,panel2;static int time=30;static int z=0;public ArcsPanel() timer1=new Timer(time,new ArcsListener(); timer2=new Timer(time,new ArcsListener(); start=new JButton(开始); end=new JButton(停止); up=new JButton(加速); down=new JButton(减速); converse=new JButton(反转); exit=new JButton(退出); label=new JLabel(speed:30); slid=new JSlider(JSlider.VERTICAL,0,120,0); panel1=new JPanel(); panel2=new JPanel(); setLayout(new BorderLayout(); slid.setMajorTickSpacing(30); slid.setMinorTickSpacing(5); slid.setPaintTicks(true); slid.setPaintLabels(true); slid.setValue(30); slid.setBackground(Color.cyan); panel1.setLayout(new FlowLayout(); panel1.add(start); panel1.add(end); panel1.setBackground(Color.cyan); panel2.setLayout(new BoxLayout(panel2,BoxLayout.Y_AXIS); panel2.add(label); panel2.add(Box.createRigidArea(new Dimension(0,120); panel2.add(up); panel2.add(Box.createRigidArea(new Dimension(0,20); panel2.add(down); panel2.add(Box.createRigidArea(new Dim