随便写了个import java.awt.event.*;
import java.awt.*;
import java.applet.*;public class DrawTest extends Applet implements TextListener {
Color color[]={Color.blue,Color.black,Color.orange,Color.pink,Color.yellow,Color.white,Color.red,Color.green, Color.magenta,Color.cyan};
int n=1;
int c=0;
TextField tf1,tf2; public void init() {
tf1=new TextField(2);
add(tf1);
tf1.addTextListener(this);
tf2=new TextField(2);
add(tf2);
tf2.addTextListener(this);
}
public void paint(Graphics g){
g.setColor(color[c]);
g.fillRect(30,60,n*30,n*30);
}
public void textValueChanged(TextEvent e){
if(e.getSource()==tf1)
n=Integer.parseInt(tf1.getText());
if(e.getSource()==tf2)
c=Integer.parseInt(tf2.getText())%10;
repaint();
}
}
import java.awt.*;
import java.applet.*;public class DrawTest extends Applet implements TextListener {
Color color[]={Color.blue,Color.black,Color.orange,Color.pink,Color.yellow,Color.white,Color.red,Color.green, Color.magenta,Color.cyan};
int n=1;
int c=0;
TextField tf1,tf2; public void init() {
tf1=new TextField(2);
add(tf1);
tf1.addTextListener(this);
tf2=new TextField(2);
add(tf2);
tf2.addTextListener(this);
}
public void paint(Graphics g){
g.setColor(color[c]);
g.fillRect(30,60,n*30,n*30);
}
public void textValueChanged(TextEvent e){
if(e.getSource()==tf1)
n=Integer.parseInt(tf1.getText());
if(e.getSource()==tf2)
c=Integer.parseInt(tf2.getText())%10;
repaint();
}
}
import java.awt.event.*;
import javax.swing.*;
import com.bruceeckel.swing.*;
class Rect extends JPanel {
private Color color = Color.red; private int size = 50; public void setColor(Color color) {
this.color = color;
repaint();
} public void setSize(int size) {
this.size = size;
repaint();
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.setColor(color);
g.drawRect(5, 5, size, size);
}
}
public class DrawRect extends JApplet {
JPanel jp = new Rect(); JButton changeColor = new JButton("ChangeColor"),
changeSize = new JButton("ChangeSize"); public void run() {
Container cp = getContentPane();
cp.setLayout(new FlowLayout());
cp.add(jp);
cp.add(changeColor);
cp.add(changeSize);
changeColor.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
jp.setColor(Color.green);
}
});
changeSize.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
jp.setSize(100);
}
});
} public static void main(String[] args) {
Console.run(new DrawRect(), 300, 300);
}
}
import javax.swing.*;
import java.awt.event.*;
public class Console {
// Create a title string from the class name :
public static String title(Object o) {
String t = o.getClass().toString(); // Remove the word "class" :
if (t.indexOf("class") != -1) {
t = t.substring(6);
}
return t;
} public static void setupClosing(JFrame frame) {
// The JDK 1.2 Solution as an
// anonymous inner class : frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
}); // The improved solution in JDK 1.3 :
// frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
}
public static void run(JFrame frame, int width, int height) {
setupClosing(frame);
frame.setSize(width, height);
frame.setVisible(true);
} public static void run(JApplet applet, int width, int height) {
JFrame frame = new JFrame(title(applet));
setupClosing(frame);
frame.getContentPane().add(applet);
frame.setSize(width, height);
applet.init();
applet.start();
frame.setVisible(true);
} public static void run(JPanel panel, int width, int height) {
JFrame frame = new JFrame(title(panel));
setupClosing(frame);
frame.getContentPane().add(panel);
frame.setSize(width, height);
frame.setVisible(true);
}
}