我是applet的新手，我有一个问题访问被拒绝java.lang.runtimepermission exitvm.0它在Safari上显示我这个错误，Firefox没有向我显示任何内容，我不知道为什么会这样，它在我的Eclipse上完美运行，但它不能在Web浏览器上运行任何帮助？感谢。
package test;
import javax.imageio.ImageIO;
import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.image.BufferedImage;
import java.awt.image.FilteredImageSource;
import java.awt.image.ImageFilter;
import java.awt.image.ImageProducer;
import java.awt.image.RGBImageFilter;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.net.URL;
import java.lang.reflect.Method;
public class app extends JApplet{
URL url;
String methodName;
String f1="http://localhost/webpage/upload/suit.jpeg";
String f2="http://localhost/webpage/customers/download.jpeg";
boolean setR=false;
Image image=null;
int x=0;
int y=0;
int endX;
int endY;
int center1;
int center2;
int imageWidth;
int imageHeight;
boolean clicked=false;
int initialX=0;
int initialY=0;
public void init(){
load();
}
public void start(){
load();
}
public void load(){
//String methodName = method.getName();
// try{
Image img= getImage(getDocumentBase(), f1);
makeColorTransparent(img,Color.white);
initialX=img.getWidth(null);
initialY=img.getHeight(null);
// }//catch (InvocationTargetException ex) {
//ex.getTargetException();
// }
}
public Image makeColorTransparent
(Image im, final Color color) {
ImageFilter filter = new RGBImageFilter() {
// the color we are looking for... Alpha bits are set to opaque
public int markerRGB = color.getRGB() | 0xFF000000;
public final int filterRGB(int x, int y, int rgb) {
if ( ( rgb | 0xFF000000 ) == markerRGB ) {
// Mark the alpha bits as zero - transparent
return 0x00FFFFFF & rgb;
}
else {
// nothing to do
return rgb;
}
}
};
ImageProducer ip = new FilteredImageSource(im.getSource(), filter);
image=Toolkit.getDefaultToolkit().createImage(ip);
drawing();
return Toolkit.getDefaultToolkit().createImage(ip);
}
public void drawing(){
Image img=null;
//File f=new File("./src/trans1/download.jpeg");
draw2();
//buff=ImageIO.read(img);
//try {
// img = ImageIO.read(new File("download.jpeg"));
// } catch (IOException e) {
// }
BufferedImage buff=new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB);
//buff=img;
ImageIcon pic1=null;
//try {
// pic1 = new ImageIcon(ImageIO.read(new File("./src/trans1/download.jpeg")));
System.out.println("I am working");
// } catch (IOException e) {
// TODO Auto-generated catch block
// e.printStackTrace();
//}
JFrame frame=new JFrame();
Graphics2D bGr = buff.createGraphics();
bGr.drawImage(img, 0, 0, null);
bGr.dispose();
buff.getGraphics().drawImage(img, 100, 100, null);
//JLabel label1=new JLabel(pic1);
frame.setSize(300,300);
// frame.add(label1);
// this.add(label1);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.add(this);
this.addMouseListener(new MouseL());
this.addMouseMotionListener(new MouseList());
frame.setVisible(true);
}
public void draw2(){
BufferedImage buff;
int type;
int width;
int height;
try {
// buff=new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB);
url = new URL (getCodeBase(), f2 );
buff=ImageIO.read(url);
Image img=ImageIO.read(url);
type=buff.getType();
width=buff.getWidth();
height=buff.getHeight();
Graphics g=buff.getGraphics();
g.drawImage(img, width, height, null);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void draw3(Graphics g, Image img){
g.drawImage(img, 0, 0, null);
// g.drawImage(img, img.getWidth(null), img.getWidth(null), null);
}
public void paint(Graphics g){
Image img=getImage(getDocumentBase(), f2);
draw3(g,img);
draw2();
if(image == null) return;
if(clicked==false){
imageWidth = image.getWidth(this);
imageHeight = image.getHeight(this);}
endX=x+imageWidth;
endY=y+imageHeight;
g.drawImage(image, x, y, imageWidth, imageHeight, this );
if(setR){
g.drawRect(x, y, imageWidth, imageHeight);
center1=(x+endX)/2;
center2=(y+endY)/2;
g.drawRect(center1, y, 3, 3);
g.drawRect(center1,endY, 3,3);
g.drawRect(x, center2, 3, 3);
g.drawRect(endX, center2, 3, 3);
}
}
int inX;
int inY;
int subX;
int subY;
int diffX;
int diffY;
long ratio;
boolean isSet=false;
class MouseList implements MouseMotionListener{
@Override
public void mouseDragged(MouseEvent arg0) {
setR=true;
if(isSet==true){
subX=arg0.getX();
subY=arg0.getY();
diffX=subX-inX;
diffY=subY-inY;
x=x+diffX;
y=y+diffY;
repaint();
inX=arg0.getX();
inY=arg0.getY();
//setR=false;
repaint();
}else{
if(clicked==true){
subY=arg0.getY();
diffY=subY-inY;
if(ratio==0){
ratio=1;
}
diffX=(int) (diffY/ratio);
y=y-diffY;
x=x-diffX;
imageHeight=imageHeight+diffY;
imageWidth=imageWidth+diffX;
//size of the screen
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
//height of the task bar
Insets scnMax = Toolkit.getDefaultToolkit().getScreenInsets(getGraphicsConfiguration());
int taskBarSize = scnMax.bottom;
//available size of the screen
//setLocation(screenSize.width - getWidth(), screenSize.height - taskBarSize - getHeight());
if(imageHeight<0 || imageWidth<0 || imageWidth>=screenSize.width ||imageHeight>=screenSize.height){
imageHeight=initialY;
x=0;
y=0;
imageWidth=initialX;
}
setR=false;
repaint();
}
}
}
@Override
public void mouseMoved(MouseEvent arg0) {
// TODO Auto-generated method stub
}
}
class MouseL implements MouseListener{
@Override
public void mouseClicked(MouseEvent arg0) {
// TODO Auto-generated method stub
if((arg0.getX()<x &&arg0.getY()<y)||(arg0.getX()<x && arg0.getY()>endY)||(arg0.getX()>endX && arg0.getY()<y)||(arg0.getX()>endX && arg0.getY()>endY)){
System.out.println(" 1 I am working");
setR=false;
repaint();
}
}
@Override
public void mouseEntered(MouseEvent arg0) {
/* if(arg0.getX()>x && arg0.getX()<endX && arg0.getY()>y && arg0.getY()<endY){
if(isSet==false){
inX=arg0.getX();
inY=arg0.getY();
isSet=true;
}
}*/
if(arg0.getX()>x && arg0.getX()<endX && arg0.getY()>y && arg0.getY()<endY){
System.out.println("Yes i am here");
Cursor c=new Cursor(Cursor.HAND_CURSOR);
setCursor(c);
}else if((arg0.getX()>=center1 && arg0.getX()<=center1+3)&&((arg0.getY()>=y && arg0.getY()<=y+3)||(arg0.getY()>=endY&& arg0.getY()<=endY+3))||(arg0.getY()>=center2 && arg0.getY()<=center2+3)&&((arg0.getX()>=x && arg0.getX()<=x+3)||(arg0.getX()>=endX && arg0.getX()<=endX+3))){
System.out.println("No i am here");
Cursor c=new Cursor(Cursor.N_RESIZE_CURSOR);
setCursor(c);
}/*else if(arg0.getX()<x || arg0.getX()>endX && arg0.getY()<y || arg0.getY()>endY){
System.out.println(" 1 I am working");
setR=false;
repaint();
}*/
}
@Override
public void mouseExited(MouseEvent arg0) {
// TODO Auto-generated method stub
}
@Override
public void mousePressed(MouseEvent arg0) {
System.out.println(x+" "+y+" "+endX+" "+endY+" "+arg0.getX()+" "+arg0.getY());
if(arg0.getX()>x && arg0.getX()<endX && arg0.getY()>y && arg0.getY()<endY){
if(isSet==false){
inX=arg0.getX();
inY=arg0.getY();
isSet=true;
}
//repaint();
System.out.println("2");
}
else if((arg0.getX()>=center1 && arg0.getX()<=center1+3)&&((arg0.getY()>=y && arg0.getY()<=y+3)||(arg0.getY()>=endY&& arg0.getY()<=endY+3))||(arg0.getY()>=center2 && arg0.getY()<=center2+3)&&((arg0.getX()>=x && arg0.getX()<=x+3)||(arg0.getX()>=endX && arg0.getX()<=endX+3))){
if((arg0.getX()>=center1 && arg0.getX()<=center1+3)&&((arg0.getY()>=y && arg0.getY()<=y+3)||(arg0.getY()>=endY&& arg0.getY()<=endY+3))){
ratio=imageHeight/imageWidth;
inY=arg0.getY();
clicked=true;
}
//repaint();
System.out.println("3");
}else if((arg0.getX()<x || arg0.getY()<y)||(arg0.getX()<x || arg0.getY()>endY)||(arg0.getX()>endX || arg0.getY()<y)||(arg0.getX()>endX || arg0.getY()>endY)){
System.out.println(" 1 I am working");
setR=false;
repaint();
System.out.println("4");
}
//repaint();
/*else if((arg0.getX()<x || arg0.getX()>endX)|| (arg0.getY()<y || arg0.getY()>endY)){
System.out.println(" 1 I am working");
setR=false;
repaint();
}*/
}
@Override
public void mouseReleased(MouseEvent arg0) {
// TODO Auto-generated method stub
isSet=false;
// clicked=false;
// setR=false;
// repaint();
}
}
}
答案 0 :(得分：2)
问题在于这一行：
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
设置EXIT_ON_CLOSE时，我们有效地尝试让JVM在帧关闭后立即关闭。 applet安全管理器（即使applet受信任）也会阻止它。
应该是：
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
这将解决当前的问题，但更好的解决方案是废弃applet并将所有必要的控件放在一个框架中。完成后，使用Java Web Start启动框架。