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import java.applet.*
import java.math.*
import java.awt.event.*
public class dffg extends Applet implements ActionListener
{
Button bb,bn
TextField tt
int aa
public void init()
{
bb=new Button("画图")
bn=new Button("清除重画")
tt=new TextField(5)
add(bb)
add(tt)
add(bn)
bb.addActionListener(this)
bn.addActionListener(this)
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==bb)
{
int aa=Integer.parseInt(tt.getText())
Graphics g=getGraphics()
for(int i=1i<500i++)
{
int x=i
int y=(int)(Math.sin(aa*x*3.14/181)*100+150)
g.drawString("s",x,y)
}
}
if(e.getSource()==bn)
{
repaint()
}
}
}
package mathimport java.awt.BorderLayout
import java.awt.Dimension
import java.awt.GridLayout
import java.awt.Toolkit
import javax.swing.ButtonGroup
import javax.swing.JButton
import javax.swing.JComboBox
import javax.swing.JFrame
import javax.swing.JLabel
import javax.swing.JPanel
import javax.swing.JRadioButton
import javax.swing.JTextField
public class UI extends JFrame
{
MyPanel mp
JPanel pl = new JPanel()
JPanel pl1 = new JPanel(),
pl2 = new JPanel(),
pl3 = new JPanel(),
pl4 = new JPanel()
JRadioButton rb1,rb2
ButtonGroup bg = new ButtonGroup()
JTextField tf = new JTextField(16)
String[] s = {"y = sin(x)", "y = cos(x)", "y = tan(x)",
"y = pow(x, 2)", "y = pow(x, 3)", "y = log(x)",
"y = pow(2, x)", "y = sqrt(x)", "r = a(sita)"}
JComboBox cb
JButton bn1 = new JButton("变宽"),
bn2 = new JButton("变窄"),
bn3 = new JButton("拉长"),
bn4 = new JButton("压短"),
bn = new JButton("绘图"),
exit = new JButton("退出"),
bn5 = new JButton("左移"),
bn6 = new JButton("右移"),
bn7 = new JButton("上移"),
bn8 = new JButton("下移")
public UI()
{
mp = new MyPanel(this)
pl1.setLayout(new GridLayout(1, 2))
pl2.setLayout(new GridLayout(1, 2))
pl3.setLayout(new GridLayout(1, 2))
pl4.setLayout(new GridLayout(1, 2))
pl1.add(bn1)bn1.setEnabled(false)
pl1.add(bn2)bn2.setEnabled(false)
pl2.add(bn3)bn3.setEnabled(false)
pl2.add(bn4)bn4.setEnabled(false)
pl3.add(bn5)bn5.setEnabled(false)
pl3.add(bn6)bn6.setEnabled(false)
pl4.add(bn7)bn7.setEnabled(false)
pl4.add(bn8)bn8.setEnabled(false)
pl.setLayout(new GridLayout(20, 1))
rb1 = new JRadioButton("输入函数")
rb2 = new JRadioButton("选择已有函数")
rb2.setSelected(true)
tf.setEnabled(false)
bg.add(rb1)bg.add(rb2)
rb1.addActionListener(mp)
rb2.addActionListener(mp)
pl.add(rb1)
pl.add(tf)
pl.add(rb2)
cb = new JComboBox(s)
pl.add(cb)
pl.add(new JLabel())
pl.add(pl1)pl.add(pl2)
pl.add(pl3)pl.add(pl4)
pl.add(bn)
pl.add(exit)
bn1.addActionListener(mp)
bn2.addActionListener(mp)
bn3.addActionListener(mp)
bn4.addActionListener(mp)
bn5.addActionListener(mp)
bn6.addActionListener(mp)
bn7.addActionListener(mp)
bn8.addActionListener(mp)
bn.addActionListener(mp)
exit.addActionListener(mp)
this.setLayout(new BorderLayout())
this.add(mp, BorderLayout.CENTER)
this.add(pl, BorderLayout.EAST)
this.setTitle("平面直角坐标系画图小工具")
this.setSize(797, 600 + 37)
Dimension dn = Toolkit.getDefaultToolkit().getScreenSize()
this.setLocation((dn.width - 797) / 2, (dn.height - 637) / 2)
this.setVisible(true)
this.setDefaultCloseOperation(3)
}
public static void main(String[] args)
{
new UI()
}
}
package math
import java.awt.Color
import java.awt.Graphics
import java.awt.Graphics2D
import java.awt.Point
import java.awt.event.ActionEvent
import java.awt.event.ActionListener
import java.awt.event.MouseEvent
import java.awt.event.MouseMotionListener
import java.awt.geom.Ellipse2D
import java.awt.geom.Line2D
import javax.swing.JOptionPane
import javax.swing.JPanel
public class MyPanel extends JPanel implements ActionListener,MouseMotionListener
{
UI ui
int flag
double h_times
int w_times
int dx
int dy
String str
Point pt = new Point(0, 0)
void init()
{
flag = -1
h_times = Math.PI / 100
w_times = 100
dx = 300
dy = 300
}
public MyPanel(UI ui)
{
this.addMouseMotionListener(this)
init()
this.ui = ui
}
public void paintComponent(Graphics g)
{
super.paintComponent(g)
Graphics2D g2 = (Graphics2D)g
drawCoordinate(g2)
Line2D line
g2.setColor(Color.BLUE)
g2.drawString("(" + (pt.x - 300) + ", " + (300 - pt.y) + ")", pt.x + 20, pt.y + 20)
switch(flag)
{
case 0:
g2.drawString("y = Asin(Bx + C) + D", 105, 60)
for(double i = 0i <600i += 0.01)
{
line = new Line2D.Double(i, dy - Math.sin(getReal_X(i)) * w_times, i + 1, dy - Math.sin(getReal_X(i + 1)) * w_times)
g2.draw(line)
}
break
case 1:
g2.drawString("y = Acos(Bx + C) + D", 105, 60)
for(double i = 0i <600i += 0.01)
{
line = new Line2D.Double(i, dy - Math.cos(getReal_X(i)) * w_times, i + 1, dy - Math.cos(getReal_X(i + 1)) * w_times)
g2.draw(line)
}
break
case 2:
g2.drawString("y = Atan(Bx + C) + D", 105, 60)
for(double i = 0i <600i += 0.01)
{
line = new Line2D.Double(i, dy - Math.tan(getReal_X(i)) * w_times, i + 1, dy - Math.tan(getReal_X(i + 1)) * w_times)
g2.draw(line)
}
break
case 3:
g2.drawString("y = Apow(Bx + C, 2) + D", 105, 60)
for(double i = 0i <600i += 0.01)
{
line = new Line2D.Double(i, dy - Math.pow(getReal_X(i), 2) * w_times, i + 1, dy - Math.pow(getReal_X(i + 1), 2) * w_times)
g2.draw(line)
}
break
case 4:
g2.drawString("y = Apow(Bx + C, 3) + D", 105, 60)
for(double i = 0i <600i += 0.01)
{
line = new Line2D.Double(i, dy - Math.pow(getReal_X(i), 3) * w_times, i + 1, dy - Math.pow(getReal_X(i + 1), 3) * w_times)
g2.draw(line)
}
break
case 5:
g2.drawString("y = Alog(Bx + C) + D", 105, 60)
for(double i = 0i <600i += 0.01)
{
line = new Line2D.Double(i, dy - Math.log(getReal_X(i)) * w_times, i + 1, dy - Math.log(getReal_X(i + 1)) * w_times)
g2.draw(line)
}
break
case 6:
g2.drawString("y = Apow(2, Bx + C) + D", 105, 60)
for(double i = 0i <600i += 0.01)
{
line = new Line2D.Double(i, dy - Math.pow(2, getReal_X(i)) * w_times, i + 1, dy - Math.pow(2, getReal_X(i + 1)) * w_times)
g2.draw(line)
}
break
case 7:
g2.drawString("y = Asqrt(Bx + C) + D", 105, 60)
for(double i = 0i <600i += 0.01)
{
line = new Line2D.Double(i, dy - Math.sqrt(getReal_X(i)) * w_times, i + 1, dy - Math.sqrt(getReal_X(i + 1)) * w_times)
g2.draw(line)
}
break
case 8:
g2.drawString("y = a(sita)", 105, 60)
for(double i = 0i <600i += 0.01)
{
line = new Line2D.Double(getReal_X(i) * Math.cos(getReal_X(i)), dy - getReal_X(i) * Math.sin(getReal_X(i)) * w_times, getReal_X(i) * Math.cos(getReal_X(i + 1)), dy - getReal_X(i) * Math.sin(getReal_X(i + 1)) * w_times)
g2.draw(line)
}
break
}
if(flag != -1)
{
g2.drawString("A = " + w_times, 105, 90)
g2.drawString("B= " + h_times, 105, 120)
g2.drawString("C= " + (300 - dx), 105, 150)
g2.drawString("D= " + (300 - dy), 105, 180)
}
}
private double getReal_X(double x)
{
return (x - dx) * h_times
}
private void drawCoordinate(Graphics2D g2)
{
int len = 20
Line2D line
for(int i = 0i <= 600 / leni++)
{
g2.setColor(Color.PINK.darker())
if(i == 300 / len)
g2.setColor(Color.RED)
else
line = new Line2D.Double(0, i * len, 600, i * len)
g2.draw(line)
line = new Line2D.Double(i * len, 0, i * len, 600)
g2.draw(line)
}
drawPoint(g2, 300, 300)
}
private void drawPoint(Graphics2D g2, double x, double y)
{
g2.setColor(Color.YELLOW)
Ellipse2D circle = new Ellipse2D.Double(x - 2, y - 2, 4, 4)
g2.fill(circle)
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource() == ui.rb1)
{
ui.tf.setEnabled(true)
ui.cb.setEnabled(false)
flag = -1
}
if(e.getSource() == ui.rb2)
{
ui.tf.setEnabled(false)
ui.cb.setEnabled(true)
}
if(e.getSource() == ui.bn1)
{
h_times /= 1.1
}
if(e.getSource() == ui.bn2)
{
h_times *= 1.1
}
if(e.getSource() == ui.bn3)
{
// ui.bn4.setEnabled(true)
w_times += 10
// if(w_times >= 300)
// ui.bn3.setEnabled(false)
}
if(e.getSource() == ui.bn4)
{
// ui.bn3.setEnabled(true)
w_times -= 10
// if(w_times <= 0)
// ui.bn4.setEnabled(false)
}
if(e.getSource() == ui.bn5)
{
dx -= 10
}
if(e.getSource() == ui.bn6)
{
dx += 10
}
if(e.getSource() == ui.bn7)
{
// ui.bn8.setEnabled(true)
dy -= 10
// if(dy <= 0)
// ui.bn7.setEnabled(false)
}
if(e.getSource() == ui.bn8)
{
// ui.bn7.setEnabled(true)
dy += 10
// if(dy >= 600)
// ui.bn8.setEnabled(false)
}
if(e.getSource() == ui.bn)
{
if(ui.tf.isEnabled() == true)
{
str = ui.tf.getText()
if(str == null || str.length() == 0)
{
ui.bn1.setEnabled(false)
ui.bn2.setEnabled(false)
ui.bn3.setEnabled(false)
ui.bn4.setEnabled(false)
ui.bn5.setEnabled(false)
ui.bn6.setEnabled(false)
ui.bn7.setEnabled(false)
ui.bn8.setEnabled(false)
JOptionPane.showMessageDialog(this, "请输入函数表达式 !")
return
}
}else flag = -2
ui.bn1.setEnabled(true)
ui.bn2.setEnabled(true)
ui.bn3.setEnabled(true)
ui.bn4.setEnabled(true)
ui.bn5.setEnabled(true)
ui.bn6.setEnabled(true)
ui.bn7.setEnabled(true)
ui.bn8.setEnabled(true)
init()
if(ui.cb.isEnabled() == true)
{
flag = ui.cb.getSelectedIndex()
}
}
if(e.getSource() == ui.exit)
System.exit(0)
repaint()
}
public void mouseDragged(MouseEvent arg0)
{
}
public void mouseMoved(MouseEvent e)
{
pt = e.getPoint()
repaint()
}
}
