Try this. The judgement has not been done yet though.import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class DrawRect extends JFrame {
private MyPanel jPanel1 = new MyPanel(); public DrawRect() throws HeadlessException {
try {
jbInit();
}
catch(Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) throws HeadlessException {
DrawRect dr = new DrawRect();
dr.setSize(200,200);
dr.setVisible(true);
}
private void jbInit() throws Exception {
this.getContentPane().add(jPanel1, BorderLayout.CENTER);
}
}class MyPanel extends JPanel {
Color cOrg = null;
Color cChg = Color.red;
boolean isChg = false;
public MyPanel() {
addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
int x = e.getX();
int y = e.getY();
// if x in y in
isChg = !isChg;
repaint();
}
});
}
int w ,h ;
public void paint(Graphics g) {
w = (int) getSize().getWidth()-100;
h = (int) getSize().getHeight()-100;
if(cOrg == null)
cOrg = g.getColor();
g.setColor(isChg?cOrg:cChg);
g.fillRect(50,50,w,h); }}
import java.awt.*;
import java.awt.event.*;
public class DrawRect extends JFrame {
private MyPanel jPanel1 = new MyPanel(); public DrawRect() throws HeadlessException {
try {
jbInit();
}
catch(Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) throws HeadlessException {
DrawRect dr = new DrawRect();
dr.setSize(200,200);
dr.setVisible(true);
}
private void jbInit() throws Exception {
this.getContentPane().add(jPanel1, BorderLayout.CENTER);
}
}class MyPanel extends JPanel {
Color cOrg = null;
Color cChg = Color.red;
boolean isChg = false;
public MyPanel() {
addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
int x = e.getX();
int y = e.getY();
// if x in y in
isChg = !isChg;
repaint();
}
});
}
int w ,h ;
public void paint(Graphics g) {
w = (int) getSize().getWidth()-100;
h = (int) getSize().getHeight()-100;
if(cOrg == null)
cOrg = g.getColor();
g.setColor(isChg?cOrg:cChg);
g.fillRect(50,50,w,h); }}
class MyPanel extends JPanel {
static final int W = 50, H = 50; int w ,h ;
Color cOrg = null;
boolean isChg = false; public MyPanel() {
addMouseListener(new MouseAdapter() {
public void mouseClicked(MouseEvent e) {
if(chkIn(e)){
isChg = !isChg;
}
repaint();
}
});
addMouseMotionListener(new MouseMotionListener() {
public void mouseMoved(MouseEvent e) {
setCursor(chkIn(e)?new Cursor(Cursor.CROSSHAIR_CURSOR):new Cursor(Cursor.HAND_CURSOR));
}
public void mouseDragged(MouseEvent e){}
});
}
boolean chkIn(MouseEvent e) {
int x = e.getX();
int y = e.getY();
return (x >W && x < w+W &&
y > H && y < h+H);
} public void paint(Graphics g) {
w = (int) getSize().getWidth()-2*W;
h = (int) getSize().getHeight()-2*H;
if(cOrg == null)
cOrg = g.getColor();
g.setColor(isChg?cOrg:Color.red);
g.fillRect(50,50,w,h); }
}
g.setColor(Color.white);
g.drawString("Hello World",60,70);
cannot resolve symbol
symbol:class DrawRect
public DrawRect() throws HeadlessException{