Java小程序的项目＆QUOT; java.security.AccessControlException：拒绝访问＆QUOT;错误 [英] Java applet project "java.security.AccessControlException: access denied" error
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问题描述
这是我的第一个小程序的项目，由于某种原因，当我尝试运行小程序我得到这个错误。
警告：无法读取的appletviewer属性文件：
C：\\用户\\学生\\ .hotjava \\属性使用默认值。
java.security.AccessControlException：访问被拒绝（
java.lang.RuntimePermissionexitVM.0）
不过，code工作比其他的完美。我不能确定是什么原因造成这个错误。我迟到了2天，这项任务，并且需要有人来帮助我。我一直在敲打我的脑袋在桌子上几个小时。
进口java.awt中的*。
java.awt.event中导入*。
进口的javax.swing *。
进口了java.util.Random;
进口javax.swing.JApplet中;
/ **剪刀石头布类* /
公共类JRockPaperScissors扩展JApplet的{
//变量声明
私人的JLabel titleLbl;
私人的JLabel selectionLbl;
私人的JLabel resultsLbl;
私人的JTextArea resultTextArea;
私人的JButton rockBn;
私人的JButton paperBn;
私人的JButton scissorBn;
私营集装箱的contentPane;
私人INT CPU = 0;
私人INT胜= 0;
私人INT损失= 0;
私人INT关系= 0;
私人最终诠释CHOICE_MAX = 3;
私人最终诠释ROCK = 0;
私人最终诠释纸= 1;
私人最终诠释剪刀= 2;
私人随机兰特=新的随机（）;
//变量声明结束公共JRockPaperScissors（）{
的InitializeComponent（）;
} / **初始化成品的配件* /
私人无效的InitializeComponent（）
{
titleLbl =新的JLabel（）;
selectionLbl =新的JLabel（）;
resultsLbl =新的JLabel（）;
resultTextArea =新的JTextArea（）;
rockBn =的新的JButton（）;
paperBn =的新的JButton（）;
scissorBn =的新的JButton（）;
的contentPane =的getContentPane（）; //
// titleLbl
//
titleLbl.setText（石头，剪子，布）;
titleLbl.setFont（新字体（Garrmond，Font.BOLD，30））;
//
// selectionLbl
//
selectionLbl.setText（选择其中一项）;
selectionLbl.setFont（新字体（宋体，Font.BOLD，14））;
//
// resultsLbl
//
resultsLbl.setText（***** *****结果）;
selectionLbl.setFont（新字体（宋体，Font.BOLD，14））;
//
// resultTextArea
//
resultTextArea.setOpaque（假）;
resultTextArea.setBackground（新颜色（236，233，216））; //
// rockBn
//
rockBn.setText（岩石）;
rockBn.addActionListener（新的ActionListener（）{
公共无效的actionPerformed（ActionEvent的五）
{
rockBn_actionPerformed（E）;
} }）;
//
// paperBn
//
paperBn.setText（纸）;
paperBn.addActionListener（新的ActionListener（）{
公共无效的actionPerformed（ActionEvent的五）
{
paperBn_actionPerformed（E）;
} }）;
//
// scissorBn
//
scissorBn.setText（剪刀）;
scissorBn.addActionListener（新的ActionListener（）{
公共无效的actionPerformed（ActionEvent的五）
{
scissorBn_actionPerformed（E）;
} }）;
//
//的contentPane
//
contentPane.setLayout（NULL）;
addComponent（的contentPane，titleLbl，5,9,370,47）;
addComponent（的contentPane，selectionLbl，9,54,150,35）;
addComponent（的contentPane，resultsLbl，9,93,144,38）;
addComponent（的contentPane，resultTextArea，5132398111）;
addComponent（的contentPane，rockBn，162,58,78,31）;
addComponent（的contentPane，paperBn，247,58,81,31）;
addComponent（的contentPane，scissorBn，334,58,87,31）;
contentPane.setSize（新尺寸（435，290））;
//
// JRockPaperScissors
//
的setTitle（纸岩剪刀）;
的setSize（435，290）;
调用setVisible（真）;
}/ **添加组件没有一个布局管理器（绝对定位）* /
私人无效addComponent（集装箱货柜，组件C中，int x，INT Y，INT宽度，高度INT）
{
c.setBounds（X，Y，宽度，高度）;
container.add（C）;
}/ **动作事件的方法* /
私人无效rockBn_actionPerformed（ActionEvent的五）
{
//玩游戏选择摇滚
玩（ROCK）;
}私人无效paperBn_actionPerformed（ActionEvent的五）
{
//玩游戏选择纸
玩（纸）;
}私人无效scissorBn_actionPerformed（ActionEvent的五）
{
//玩游戏选择剪刀
玩（剪刀）;
}
//方法玩游戏
私人无效播放（INT新秀）{
串resultStr =;
//计算机随机选择
CPU = rand.nextInt（CHOICE_MAX）;
//嵌套如果statments确定赢家或输家领带
如果（挑== CPU）{
联系++;
resultStr =你选+选择（挑）+----电脑捡到+选择（CPU）;
resultStr + =\\ nWinner：帖;
resultStr + =\\ n您：+ Integer.toString（胜）++电脑+ Integer.toString（损失）+关系：+ Integer.toString（并列）;
resultTextArea.setText（resultStr）;
}
否则如果（（挑== ROCK）及及（CPU ==剪刀））{
胜++;
resultStr =你选+选择（挑）+----电脑捡到+选择（CPU）;
resultStr + =\\ nWinner：你;
resultStr + =\\ n您：+ Integer.toString（胜）++电脑+ Integer.toString（损失）+关系：+ Integer.toString（并列）;
resultTextArea.setText（resultStr）;
}
否则如果（（挑== PAPER）及及（CPU == ROCK））{
胜++;
resultStr =你选+选择（挑）+----电脑捡到+选择（CPU）;
resultStr + =\\ nWinner：你;
resultStr + =\\ n您：+ Integer.toString（胜）++电脑+ Integer.toString（损失）+关系：+ Integer.toString（并列）;
resultTextArea.setText（resultStr）;
}
否则如果（（挑==剪刀）及及（CPU == PAPER））{
胜++;
resultStr =你选+选择（挑）+----电脑捡到+选择（CPU）;
resultStr + =\\ nWinner：你;
resultStr + =\\ n您：+ Integer.toString（胜）++电脑+ Integer.toString（损失）+关系：+ Integer.toString（并列）;
resultTextArea.setText（resultStr）;
}
其他{
失去++;
resultStr =你选+选择（挑）+----电脑捡到+选择（CPU）;
resultStr + =\\ nWinner：计算机;
resultStr + =\\ n您：+ Integer.toString（胜）++电脑+ Integer.toString（损失）+关系：+ Integer.toString（并列）;
resultTextArea.setText（resultStr）;
} }
//函数返回石头纸或剪刀作为一个字符串
公共字符串的选择（INT选择）{
串tempStr;
开关（选择）{
情况下0：
tempStr =岩石;
打破;
情况1：
tempStr =纸;
打破;
案例2：
tempStr =剪刀差;
打破;
默认：
tempStr =无效;
}
返回tempStr;
}}
HTML code
＆LT; HTML和GT;
＆LT; HEAD＆GT;＆LT;标题＆GT;剪刀石头布＆LT; /标题＆GT;＆LT; /头＆GT;
＆LT;车身的bgcolor =黑＆GT;
＆LT;字体颜色=黄色＆GT;＆LT;中心及GT;＆LT; H1＆GT;欢迎您！准备玩＆LT;？/ H1＆GT;＆LT; /中心及GT;
＆LT; P＆GT;＆LT; B＆GT;＆LT;对象code =JRockPaperScissors.classWIDTH =435HEIGHT =290＆GT;＆LT; /对象＆gt;
＆LT; / FONT＆GT;
＆LT; /身体GT;
＆LT; / HTML＆GT;
解决方案
这似乎是一个破碎的applet浏览器安装到我。这code，而不在这里applet浏览器运行的错误（在我评论说，不能编译行，这意味着源的不可以你正在使用）。当您尝试在一个支持Java的浏览器，会发生什么？
HTML
我不认为HTML是相关的问题，但既然你提到它：
＆LT;对象code =JRockPaperScissors.classWIDTH =435HEIGHT =290＆GT;＆LT; /对象＆gt;
我在测试过程中3建议。
- 交换
对象为小程序 - 删除code属性的
的.class扩展 - 它意味着是完全合格的类名，而不是文件名。而第二通常容忍，第一是正确的。 - 更改标准的风格引号'智能引号'。它看起来像HTML是一个文字处理器prepared，或者更好的是，彻底删除引号。
例如
＆LT;小程序code = JRockPaperScissors WIDTH = 435 HEIGHT = 290＆GT;＆LT; /小程序＆GT;
This is my first applet project and for some reason when I try to run the applet I get this error.
Warning: Can't read AppletViewer properties file:
C:\Users\students\.hotjava\properties Using defaults.
java.security.AccessControlException: access denied (
"java.lang.RuntimePermission" "exitVM.0")
But the code works perfect other than that. I am unsure what is causing this error. I am 2 days late on this assignment, and need someone to help me. I have been banging my head on the desk for hours.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.Random;
import javax.swing.JApplet;
/** rock paper scissors class */
public class JRockPaperScissors extends JApplet{
// Variables declaration
private JLabel titleLbl;
private JLabel selectionLbl;
private JLabel resultsLbl;
private JTextArea resultTextArea;
private JButton rockBn;
private JButton paperBn;
private JButton scissorBn;
private Container contentPane;
private int cpu = 0;
private int wins = 0;
private int loses = 0;
private int ties = 0;
private final int CHOICE_MAX = 3;
private final int ROCK = 0;
private final int PAPER = 1;
private final int SCISSORS = 2;
private Random rand = new Random();
// End of variables declaration
public JRockPaperScissors(){
initializeComponent();
}
/** initializing componets */
private void initializeComponent()
{
titleLbl = new JLabel();
selectionLbl = new JLabel();
resultsLbl = new JLabel();
resultTextArea = new JTextArea();
rockBn = new JButton();
paperBn = new JButton();
scissorBn = new JButton();
contentPane = getContentPane();
//
// titleLbl
//
titleLbl.setText("Rock, Paper, Scissors");
titleLbl.setFont(new Font("Garrmond", Font.BOLD, 30));
//
// selectionLbl
//
selectionLbl.setText("Choose one");
selectionLbl.setFont(new Font("Arial",Font.BOLD,14));
//
// resultsLbl
//
resultsLbl.setText("*****Results*****");
selectionLbl.setFont(new Font("Arial",Font.BOLD,14));
//
// resultTextArea
//
resultTextArea.setOpaque(false);
resultTextArea.setBackground(new Color(236, 233, 216));
//
// rockBn
//
rockBn.setText("Rock");
rockBn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
rockBn_actionPerformed(e);
}
});
//
// paperBn
//
paperBn.setText("Paper");
paperBn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
paperBn_actionPerformed(e);
}
});
//
// scissorBn
//
scissorBn.setText("Scissors");
scissorBn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e)
{
scissorBn_actionPerformed(e);
}
});
//
// contentPane
//
contentPane.setLayout(null);
addComponent(contentPane, titleLbl, 5,9,370,47);
addComponent(contentPane, selectionLbl, 9,54,150,35);
addComponent(contentPane, resultsLbl, 9,93,144,38);
addComponent(contentPane, resultTextArea, 5,132,398,111);
addComponent(contentPane, rockBn, 162,58,78,31);
addComponent(contentPane, paperBn, 247,58,81,31);
addComponent(contentPane, scissorBn, 334,58,87,31);
contentPane.setSize(new Dimension(435, 290));
//
// JRockPaperScissors
//
setTitle("Paper Rock Scissors");
setSize(435, 290);
setVisible(true);
}
/** Add Component Without a Layout Manager (Absolute Positioning) */
private void addComponent(Container container,Component c,int x,int y,int width,int height)
{
c.setBounds(x,y,width,height);
container.add(c);
}
/** action event methods */
private void rockBn_actionPerformed(ActionEvent e)
{
//play the game choosing rock
play(ROCK);
}
private void paperBn_actionPerformed(ActionEvent e)
{
//play the game choosing paper
play(PAPER);
}
private void scissorBn_actionPerformed(ActionEvent e)
{
//play the game choosing scissors
play(SCISSORS);
}
//method to play the game
private void play(int pick){
String resultStr = "";
//random computer choice
cpu = rand.nextInt(CHOICE_MAX);
//nested if statments to determine winner loser or tie
if(pick == cpu){
ties++;
resultStr = "You picked " + selection(pick) + " ---- Computer picked " + selection(cpu);
resultStr += "\nWinner: Tie";
resultStr += "\nYou: " + Integer.toString(wins) + " " + "Computer: " + Integer.toString(loses) + " Ties: " + Integer.toString(ties);
resultTextArea.setText(resultStr);
}
else if( (pick == ROCK) && (cpu == SCISSORS) ){
wins++;
resultStr = "You picked " + selection(pick) + " ---- Computer picked " + selection(cpu);
resultStr += "\nWinner: You";
resultStr += "\nYou: " + Integer.toString(wins) + " " + "Computer: " + Integer.toString(loses) + " Ties: " + Integer.toString(ties);
resultTextArea.setText(resultStr);
}
else if( (pick == PAPER) && (cpu == ROCK) ){
wins++;
resultStr = "You picked " + selection(pick) + " ---- Computer picked " + selection(cpu);
resultStr += "\nWinner: You";
resultStr += "\nYou: " + Integer.toString(wins) + " " + "Computer: " + Integer.toString(loses) + " Ties: " + Integer.toString(ties);
resultTextArea.setText(resultStr);
}
else if( (pick == SCISSORS) && (cpu == PAPER) ){
wins++;
resultStr = "You picked " + selection(pick) + " ---- Computer picked " + selection(cpu);
resultStr += "\nWinner: You";
resultStr += "\nYou: " + Integer.toString(wins) + " " + "Computer: " + Integer.toString(loses) + " Ties: " + Integer.toString(ties);
resultTextArea.setText(resultStr);
}
else{
loses++;
resultStr = "You picked " + selection(pick) + " ---- Computer picked " + selection(cpu);
resultStr += "\nWinner: Computer";
resultStr += "\nYou: " + Integer.toString(wins) + " " + "Computer: " + Integer.toString(loses) + " Ties: " + Integer.toString(ties);
resultTextArea.setText(resultStr);
}
}
//function returns paper rock or scissors as a string
public String selection(int choice){
String tempStr;
switch(choice){
case 0:
tempStr = "rock";
break;
case 1:
tempStr = "paper";
break;
case 2:
tempStr = "scissors";
break;
default:
tempStr = "invalid";
}
return tempStr;
}
}
HTML CODE
<html>
<head><title>Rock Paper Scissors</title></head>
<body bgcolor="black">
<font color="yellow"><center><h1>Welcome!! Ready to play?</h1></center>
<p><b><object code = "JRockPaperScissors.class" width = "435" height = "290"></object>
</font>
</body>
</html>
解决方案
This appears to be a broken applet viewer installation to me. That code runs without error in applet viewer here (after I comment the line that does not compile, which implies that source is not what you are using). What happens when you try it in a Java enabled browser?
HTML
I don't think the HTML is relevant to the problem, but since you mentioned it:
<object code = "JRockPaperScissors.class" width = "435" height = "290"></object>
I have 3 recommendations during testing.
- Swap
objectforapplet - Remove the
.classextension of the code attribute - it is meant to be the fully qualified class name, not a file name. While the 2nd is usually tolerated, the 1st is correct. - Change the 'smart quotes' for standard " style quotes. It looks like that HTML was prepared in a word processor. Or better still, remove the quotes completely.
E.G.
<applet code=JRockPaperScissors width=435 height=290></applet>
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