13518219792
上代码：
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import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.LayoutManager;
import java.awt.Paint;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;
import java.awt.event.*;
public class YuanYiDong extends JFrame{
private static int BANJIN=0;
private static int X=0;
private static int Y=0;
JTextField rTxt=new JTextField(5);
JTextField xField=new JTextField(5);
JTextField yField=new JTextField(5);
JButton paintBt=new JButton("画");
JLabel huaban=new huaban();
JPanel jPanel=new JPanel();
JLabel banjingLabel,xLabel,yLabel;
public YuanYiDong(){
banjingLabel=new JLabel("半径");
xLabel=new JLabel("X坐标");
yLabel=new JLabel("Y坐标");
this.setTitle("圆的移动");
this.setLocation(300,100);
this.setSize(500, 400);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.setVisible(true);
this.add(rTxt);
jPanel.setLayout(new FlowLayout());
add(huaban,BorderLayout.CENTER);
jPanel.add(banjingLabel);
jPanel.add(rTxt);
jPanel.add(xLabel);
jPanel.add(xField);
jPanel.add(yLabel);
jPanel.add(yField);
jPanel.add(paintBt);
add(jPanel,BorderLayout.NORTH);
paintBt.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
BANJIN=Integer.parseInt(rTxt.getText());
X=Integer.parseInt(xField.getText());
Y=Integer.parseInt(yField.getText());
huaban.repaint();
}
});
}
private void drawCirlce(Graphics g) {
g.setColor(Color.blue);
g.fillOval(X, Y, BANJIN,BANJIN);
}
public static void main(String[] args) {
YuanYiDong frame = new YuanYiDong();
}
public class huaban extends JLabel{
public huaban(){}
public void paint(Graphics g) {
Image image = createImage(getWidth(), getHeight());
drawCirlce(image.getGraphics());
g.drawImage(image, 0, 0, null);
}
}
}
给分吧！
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class ResponseToMouse extends Applet implements ActionListener,MouseListener,MouseMotionListener
{
int xPos,yPos,k=0;
Button btnDraw,btnClean,btnErase;
public void init()
{
btnDraw = new Button("画图");
btnClean = new Button("清屏");
btnErase = new Button("擦除");
add(btnDraw);
add(btnClean);
add(btnErase);
btnDraw.addActionListener(this);
btnClean.addActionListener(this);
btnErase.addActionListener(this);
addMouseListener(this);
addMouseMotionListener(this);
}
public void paint(Graphics g)
{
if(k==1)
{
g.setColor(Color.red);
g.fillOval(xPos-5,yPos-5,10,10);
}
if(k==2)
{
super.update(g);
}
if(k==3)
{
g.setColor(Color.white);
g.fillOval(xPos-5,yPos-5,10,10);
}
}
public void actionPerformed(ActionEvent e){
if (e.getSource()==btnDraw)
k=1;
if(e.getSource()==btnClean){
k=2;
repaint();
}
if(e.getSource()==btnErase)
k=3;
}
public void mouseClicked(MouseEvent e)
{
}
public void mousePressed(MouseEvent e)
{
showStatus("鼠标键按下");
}
public void mouseReleased(MouseEvent e)
{
showStatus("鼠标键释放");
}
public void mouseEntered(MouseEvent e)
{
showStatus("鼠标进入");
}
public void mouseExited(MouseEvent e)
{
showStatus("鼠标移出");
}
public void mouseDragged(MouseEvent e)
{
xPos=e.getX();
yPos=e.getY();
repaint();
}
public void mouseMoved(MouseEvent e)
{
showStatus("鼠标移动");
}
public void update(Graphics g){
paint(g);
}
}
我随手写了一个，你自己看看，注释我就不写了
import java.awt.Color;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class TestDraw implements ActionListener {
private JButton b1,b2,b3;
JFrame frame;
MyPanel panel;
public void init() {
frame = new JFrame();
frame.setBounds(100, 100, 400, 300);
frame.setTitle("画");
frame.setLayout(new GridLayout(2, 1));
JPanel p1 = new JPanel();
b1 = new JButton("直线");
b2 = new JButton("矩形");
b3 = new JButton("椭圆");
b1.addActionListener(this);
b2.addActionListener(this);
b3.addActionListener(this);
p1.add(b1);
p1.add(b2);
p1.add(b3);
panel = new MyPanel();
frame.add(p1);
frame.add(panel);
frame.setVisible(true);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void actionPerformed(ActionEvent e) {
if(e.getSource() == b1) {
panel.setFlag(0);
panel.repaint();
}else if(e.getSource() == b2) {
panel.setFlag(1);
panel.repaint();
}else if(e.getSource() == b3) {
panel.setFlag(2);
panel.repaint();
}
}
public static void main(String[] args) {
new TestDraw().init();
}
class MyPanel extends JPanel {
int flag = -1;
public MyPanel() {
this.setSize(400, 400);
this.setBackground(Color.white);
this.setVisible(true);
}
//画直线
public void drawL(Graphics g) {
g.drawLine(100, 20, 200, 20);
}
//画矩形
public void drawR(Graphics g) {
g.drawRect(100, 20, 200, 100);
}
//画椭圆
public void drawO(Graphics g) {
g.drawOval(100, 20, 200, 100);
}
@Override
public void paint(Graphics g) {
super.paint(g);
if(flag == 0) {
drawL(g);
}else if(flag == 1) {
drawR(g);
}else if(flag == 2) {
drawO(g);
}
}
public int getFlag() {
return flag;
}
public void setFlag(int flag) {
this.flag = flag;
}
}
}
