我以applet的形式制作游戏。所以是的，当我尝试在我的浏览器中运行这个小程序时，我得到一个错误，当我点击它的详细信息时说“java.lang.reflect.InvocationTargetException”。这是我的代码，我相信没有人会窃取任何代码。如何让它消失，我可以运行它？
package applettest;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.io.*;
import java.net.*;
import javax.imageio.ImageIO;
import javax.swing.*;
public class NewApplet extends JApplet {
String string1 = ""; //Used in the LOGINCHECK (Username)
String string2 = ""; //Used in the LOGINCHECK (Password)
////////////////////////////////////////////////////////////////////////////
JPanel startScreen = new JPanel(); //The JPanel for the player's START SCREEN
JLabel usernameLabel = new JLabel("Username:");//Creating & initializing a new JLabel.
JLabel passwordLabel = new JLabel("Password:");//Creating & initializing a new JLabe.
JTextField username = new JTextField();//Creating & initializing a new JTextField.
JTextField password = new JTextField();//Creating & initializing a new JTextField.
JButton start = new JButton(" Start ");//Creating & initializing a new button.
JButton startNew = new JButton(" Start New Game ");//Creating & initializing a new button.
Font titleFont = new Font("Arial", Font.BOLD, 30);//Creating a font.
Font labelFont = new Font("Courier", Font.PLAIN, 20);//Creating a font.
Font buttonFont = new Font("Courier", Font.PLAIN, 14);//Creating a font.
Color lightGreen = new Color(51, 255, 0);//Creating a color, light green.
Color darkRed = new Color(204, 0, 0);//Creating a color, dark red.
Dimension tfd = new Dimension(200, 20);//Creating a dimension, tfd (Text Field Dimension)
////////////////////////////////////////////////////////////////////////////
JPanel newCharacterScreen = new JPanel();//The JPanel for the player's REGISTER SCREEN
JTextField desiredUsername = new JTextField();
JLabel newCharacterTitleLabel = new JLabel("NEW CHARACTER");
JLabel usernameLabel2 = new JLabel("Enter Desired Username:");
JLabel chooseGender = new JLabel("Choose Desired Gender:");
JLabel maleLabel = new JLabel("Male");
JLabel femaleLabel = new JLabel("Female");
JRadioButton male = new JRadioButton("Male");
JRadioButton female = new JRadioButton("Female");
ButtonGroup genderGroup = new ButtonGroup();
JButton nextButton = new JButton(" Continue ");
////////////////////////////////////////////////////////////////////////////
JPanel characterCreationScreen = new JPanel();//The JPanel for the player's Character Creation Screen
////////////////////////////////////////////////////////////////////////////
//File locations for the character info
String characterName = "";
String passwordString = "";
String gender = "";
File filename = new File(System.getenv("APPDATA") + "\\.outer\\info\\" + characterName + "\\charInfo.txt");
File filename2 = new File(System.getenv("APPDATA") + "\\.outer\\info\\" + characterName + "\\playerStats.txt");
File filename3 = new File(System.getenv("APPDATA") + "\\.outer\\info\\" + characterName + "\\playerExpLvl.txt");
//File locations for the RACE IMAGES.
File dwarfPNGOutput = new File(System.getenv("APPDATA") + "\\.outer\\images\\dwarf.png");
File humanPNGOutput = new File(System.getenv("APPDATA") + "\\.outer\\images\\human.png");
File elfPNGOutput = new File(System.getenv("APPDATA") + "\\.outer\\images\\elf.png");
File orcPNGOutput = new File(System.getenv("APPDATA") + "\\.outer\\images\\orc.png");
//File locations for the CLASS images.
File knightPNGOutput = new File(System.getenv("APPDATA") + "\\.outer\\images\\knight.png");
File wizardPNGOutput = new File(System.getenv("APPDATA") + "\\.outer\\images\\wizard.png");
File rangerPNGOutput = new File(System.getenv("APPDATA") + "\\.outer\\images\\ranger.png");
File priestPNGOutput = new File(System.getenv("APPDATA") + "\\.outer\\images\\priest.png");
//File locations for the APPDATA directory + images folder.
File directory = new File(System.getenv("APPDATA") + "\\.outer");
File directoryIMAGE = new File(System.getenv("APPDATA") + "\\.outer\\images");
File directoryInfo = new File(System.getenv("APPDATA") + "\\.outer\\info");
//URL's FOR RACE PHOTOS
String dwarfPNG = "http://eaglepwn.ucoz.com/images/dwarf.png";
String humanPNG = "http://eaglepwn.ucoz.com/images/human.png";
String elfPNG = "http://eaglepwn.ucoz.com/images/elf.png";
String orcPNG = "http://eaglepwn.ucoz.com/images/orc.png";
/////////////
String knightPNG = "http://eaglepwn.ucoz.com/images/knight.png";
String wizardPNG = "http://eaglepwn.ucoz.com/images/wizard.png";
String rangerPNG = "http://eaglepwn.ucoz.com/images/ranger.png";
String priestPNG = "http://eaglepwn.ucoz.com/images/priest.png";
/////////////
@Override
public void init() {
initComponents();
try {
//This sets the look and feel to NIMBUS.
UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
} catch (Exception e) {
e.printStackTrace();
}
//Calls the method showStartScreen()
startGame();
}
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
getContentPane().setLayout(new java.awt.CardLayout());
}// </editor-fold>
// Variables declaration - do not modify
// End of variables declaration
public void colorAndFont() {
//Setting the background colors of all panels to black.
startScreen.setBackground(Color.BLACK);
newCharacterScreen.setBackground(Color.BLACK);
characterCreationScreen.setBackground(Color.BLACK);
//Setting the font and color of the labels.
usernameLabel.setFont(labelFont);
usernameLabel.setForeground(lightGreen);
passwordLabel.setFont(labelFont);
passwordLabel.setForeground(lightGreen);
newCharacterTitleLabel.setFont(titleFont);
newCharacterTitleLabel.setForeground(darkRed);
usernameLabel2.setFont(labelFont);
usernameLabel2.setForeground(lightGreen);
chooseGender.setFont(labelFont);
chooseGender.setForeground(lightGreen);
maleLabel.setFont(labelFont);
maleLabel.setForeground(lightGreen);
femaleLabel.setFont(labelFont);
femaleLabel.setForeground(lightGreen);
//Setting the font and color of the TextFields.
username.setFont(buttonFont);
username.setForeground(lightGreen);
username.setBackground(Color.BLACK);
password.setFont(buttonFont);
password.setForeground(lightGreen);
password.setBackground(Color.BLACK);
desiredUsername.setFont(buttonFont);
desiredUsername.setForeground(lightGreen);
desiredUsername.setBackground(Color.BLACK);
//Setting the font and color of all the buttons.
start.setFont(buttonFont);
start.setForeground(lightGreen);
start.setBackground(Color.BLACK);
start.setBorder(new javax.swing.border.LineBorder(new java.awt.Color(102, 255, 0), 2, true));
startNew.setFont(buttonFont);
startNew.setForeground(lightGreen);
startNew.setBackground(Color.BLACK);
startNew.setBorder(new javax.swing.border.LineBorder(new java.awt.Color(102, 255, 0), 2, true));
nextButton.setFont(buttonFont);
nextButton.setForeground(lightGreen);
nextButton.setBackground(Color.BLACK);
nextButton.setBorder(new javax.swing.border.LineBorder(new java.awt.Color(102, 255, 0), 2, true));
//Setting the font and color of all the JRadioButtons
male.setFont(buttonFont);
male.setForeground(lightGreen);
male.setBackground(Color.BLACK);
female.setFont(buttonFont);
female.setForeground(lightGreen);
female.setBackground(Color.BLACK);
}
public void startScreenInfo(){
//Setting the size of the actual applet screen.
setSize(450, 350);
//Adding a BOX LAYOUT to the Start Screen Panel
startScreen.setLayout(new BoxLayout(startScreen, BoxLayout.Y_AXIS));
//Adding a Box Filler
startScreen.add(new Box.Filler(tfd, tfd, tfd));
//Adding a Box Filler
startScreen.add(new Box.Filler(tfd, tfd, tfd));
//Adding and editing info for usernameLabel
startScreen.add(usernameLabel);
usernameLabel.setVisible(true);
usernameLabel.setAlignmentX(Component.CENTER_ALIGNMENT);
//Adding a Box Filler
startScreen.add(new Box.Filler(tfd, tfd, tfd));
//Adding and editing info for username TextField
startScreen.add(username);
username.setVisible(true);
username.setMinimumSize(tfd);
username.setMaximumSize(tfd);
username.setPreferredSize(tfd);
username.setAlignmentX(Component.CENTER_ALIGNMENT);
username.setBorder(new javax.swing.border.LineBorder(new java.awt.Color(51, 255, 0), 2, true));
//Adding a Box Filler
startScreen.add(new Box.Filler(tfd, tfd, tfd));
//Adding and editing info for passwordLabel
startScreen.add(passwordLabel);
passwordLabel.setVisible(true);
passwordLabel.setAlignmentX(Component.CENTER_ALIGNMENT);
//Adding a Box Filler
startScreen.add(new Box.Filler(tfd, tfd, tfd));
//Adding and editing info for password TextField
startScreen.add(password);
password.setVisible(true);
password.setMinimumSize(tfd);
password.setMaximumSize(tfd);
password.setPreferredSize(tfd);
password.setAlignmentX(Component.CENTER_ALIGNMENT);
password.setBorder(new javax.swing.border.LineBorder(new java.awt.Color(51, 255, 0), 2, true));
//Adding a Box Filler
startScreen.add(new Box.Filler(tfd, tfd, tfd));
//Adding and editing info for start JButton
startScreen.add(start);
start.setVisible(true);
start.setAlignmentX(Component.CENTER_ALIGNMENT);
start.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
characterName = username.getText();
passwordString = password.getText();
logincheck();
if (string1.equals(characterName) && string2.equals(passwordString)) {
System.out.println("YOU ARE LOGGED IN!");
} else if (!string1.equals(characterName) && string2.equals(passwordString)) {
System.out.println("Incorrect Username");
} else if (string1.equals(characterName) && !string2.equals(passwordString)) {
System.out.println("Incorrect Password");
}
}
});
//Adding a Box Filler
startScreen.add(new Box.Filler(tfd, tfd, tfd));
//Adding and editing info for startNew JButton
startScreen.add(startNew);
startNew.setVisible(true);
startNew.setAlignmentX(Component.CENTER_ALIGNMENT);
//Adding an actionlistener to the startNew JBUTTON
startNew.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
//Trying to create the new directory in APPDATA
try {
if (directory.mkdir()) {
System.out.println("APPDATA Directory Created");
} else {
System.out.println("APPDATA Directory is not created");
}
} catch (Exception ex) {
ex.printStackTrace();
}
//Trying to create a new directory, inside an already made directory.
try {
if (directoryIMAGE.mkdir()) {
System.out.println("Images Directory Created");
} else {
System.out.println("Image Directory is not created");
}
} catch (Exception ex) {
ex.printStackTrace();
}
//Downloads images into directory, after calling method.
downloadImages();
downloadImages2();
showNewCharacterScreen();
}
});
//Adding a Box Filler
startScreen.add(new Box.Filler(tfd, tfd, tfd));
//Calling the method colorAndFont to set the color and font of the panels.
colorAndFont();
//Adding the startScreen to the JApplet, setting it visible
}
public void newCharacterScreenInfo() {
//Setting the size of the actual applet screen.
setSize(450, 350);
//ADDING RADIO BUTTONS INTO BUTTON GROUP
genderGroup.add(male);
genderGroup.add(female);
//Adding a BOX LAYOUT to the Start Screen Panel
newCharacterScreen.setLayout(new BoxLayout(newCharacterScreen, BoxLayout.Y_AXIS));
//Adding and editing the TITLE label at the top.
newCharacterScreen.add(newCharacterTitleLabel);
newCharacterTitleLabel.setVisible(true);
newCharacterTitleLabel.setAlignmentX(Component.CENTER_ALIGNMENT);
//Adding a Box Filler
newCharacterScreen.add(new Box.Filler(tfd, tfd, tfd));
//Adding a Box Filler
newCharacterScreen.add(new Box.Filler(tfd, tfd, tfd));
//Adding and editing the Desired Username Label
newCharacterScreen.add(usernameLabel2);
usernameLabel2.setVisible(true);
usernameLabel2.setAlignmentX(Component.CENTER_ALIGNMENT);
//Adding and editing info for desired username JTextField
newCharacterScreen.add(desiredUsername);
desiredUsername.setVisible(true);
desiredUsername.setMinimumSize(tfd);
desiredUsername.setMaximumSize(tfd);
desiredUsername.setPreferredSize(tfd);
desiredUsername.setAlignmentX(Component.CENTER_ALIGNMENT);
//Adding and editing info for Choose Gender label
newCharacterScreen.add(chooseGender);
chooseGender.setVisible(true);
chooseGender.setAlignmentX(Component.CENTER_ALIGNMENT);
//Adding and editing info for Male Label
newCharacterScreen.add(maleLabel);
maleLabel.setVisible(true);
maleLabel.setAlignmentX(Component.CENTER_ALIGNMENT);
//Adding and editing info for Male JRadioButton
newCharacterScreen.add(male);
male.setVisible(true);
male.setAlignmentX(Component.CENTER_ALIGNMENT);
male.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
gender = "Male";
}
});
//Adding and editing info for Female label.
newCharacterScreen.add(femaleLabel);
femaleLabel.setVisible(true);
femaleLabel.setAlignmentX(Component.CENTER_ALIGNMENT);
//Adding and editing info for Female JRadioButton
newCharacterScreen.add(female);
female.setVisible(true);
female.setAlignmentX(Component.CENTER_ALIGNMENT);
female.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
gender = "Female";
}
});
//Adding and editing info for nextButton JButton
newCharacterScreen.add(nextButton);
nextButton.setVisible(true);
nextButton.setAlignmentX(Component.CENTER_ALIGNMENT);
nextButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
register();
}
});
}
public void factionScreenInfo() {
}
public void startGame() {
startScreenInfo();
newCharacterScreenInfo();
factionScreenInfo();
add(startScreen);
add(newCharacterScreen);
add(characterCreationScreen);
startScreen.setVisible(true);
System.out.println("Start Screen added");
}
public void showNewCharacterScreen() {
startScreen.setVisible(false);
newCharacterScreen.setVisible(true);
revalidate();
repaint();
}
public void showCharacterCreationScreen() {
}
public void showFactionScreen() {
}
public void logincheck() {
//Creating the new buffered reader, which reads in stats.
BufferedReader bre;
try {
bre = new BufferedReader(new InputStreamReader(new FileInputStream(filename)));
String line;
while ((line = bre.readLine()) != null) {
if (line.startsWith("u")) {
string1 = line;
String substring = string1.substring(1);
string1 = substring;
} else if (line.startsWith("p")) {
string2 = line;
String substring = string2.substring(1);
string2 = substring;
}
}
bre.close();
} catch (Exception e) {
e.printStackTrace();
System.out.println("Account hasn't been created yet.");
}
}
public void downloadImages() {
System.out.println("Downloading race images....");
try {
//making a URL out of the strings..
URL urlItem = new URL(dwarfPNG);
URL urlItem2 = new URL(humanPNG);
URL urlItem3 = new URL(elfPNG);
URL urlItem4 = new URL(orcPNG);
//Creating images from the URL's.
Image imageBR = ImageIO.read(urlItem);
Image imageBR2 = ImageIO.read(urlItem2);
Image imageBR3 = ImageIO.read(urlItem3);
Image imageBR4 = ImageIO.read(urlItem4);
//Creating bufferedImages from the Images.
BufferedImage cpimg = (BufferedImage) imageBR;
BufferedImage cpimg2 = (BufferedImage) imageBR2;
BufferedImage cpimg3 = (BufferedImage) imageBR3;
BufferedImage cpimg4 = (BufferedImage) imageBR4;
//Writing images, using bufferedImages and images.
ImageIO.write(cpimg, "png", dwarfPNGOutput);
ImageIO.write(cpimg2, "png", humanPNGOutput);
ImageIO.write(cpimg3, "png", elfPNGOutput);
ImageIO.write(cpimg4, "png", orcPNGOutput);
System.out.println("Race Images downloaded....");
} catch (Exception e) {
e.printStackTrace();
System.out.println("Problem with internet, or resources.");
}
}
public void downloadImages2() {
System.out.println("Downloading class images....");
try {
URL urlItem = new URL(knightPNG);
URL urlItem2 = new URL(wizardPNG);
URL urlItem3 = new URL(rangerPNG);
URL urlItem4 = new URL(priestPNG);
Image imageBR = ImageIO.read(urlItem);
Image imageBR2 = ImageIO.read(urlItem2);
Image imageBR3 = ImageIO.read(urlItem3);
Image imageBR4 = ImageIO.read(urlItem4);
BufferedImage cpimg = (BufferedImage) imageBR;
BufferedImage cpimg2 = (BufferedImage) imageBR2;
BufferedImage cpimg3 = (BufferedImage) imageBR3;
BufferedImage cpimg4 = (BufferedImage) imageBR4;
ImageIO.write(cpimg, "png", knightPNGOutput);
ImageIO.write(cpimg2, "png", wizardPNGOutput);
ImageIO.write(cpimg3, "png", rangerPNGOutput);
ImageIO.write(cpimg4, "png", priestPNGOutput);
System.out.println("Class Images downloaded....");
} catch (Exception e) {
e.printStackTrace();
System.out.println("Problem with internet, or resources.");
}
}
public void register() {
characterName = desiredUsername.getText();
File directoryName = new File(System.getenv("APPDATA") + "\\.outer\\info" + "\\" + characterName);
filename = new File(System.getenv("APPDATA") + "\\.outer\\info\\" + characterName + "\\charInfo.txt");
filename2 = new File(System.getenv("APPDATA") + "\\.outer\\info\\" + characterName + "\\playerStats.txt");
filename3 = new File(System.getenv("APPDATA") + "\\.outer\\info\\" + characterName + "\\playerExpLvl.txt");
//Tries to create a new directory.
try {
if (directory.mkdir()) {
System.out.println("APPDATA Directory Created");
} else {
System.out.println("APPDATA Directory is not created");
}
} catch (Exception e) {
e.printStackTrace();
}
//Tries to create a new directory
try {
if (directoryIMAGE.mkdir()) {
System.out.println("Images Directory Created");
} else {
System.out.println("Image Directory is not created");
}
} catch (Exception e) {
e.printStackTrace();
}
//Tries to create a newer directory.
try {
if (directoryInfo.mkdir()) {
System.out.println("Images Directory Created");
} else {
System.out.println("Image Directory is not created");
}
} catch (Exception e) {
e.printStackTrace();
}//Tries to create a even newer directory
try {
if (directoryName.mkdir()) {
System.out.println("Images Directory Created");
} else {
System.out.println("Image Directory is not created");
}
} catch (Exception e) {
e.printStackTrace();
}
/////////////////////////////////////////////////////////////////
BufferedWriter bufferedWriter = null;
try {
// FileWriter out = new FileWriter(filename, true);
//^^^ IF I WANTED TO APPEND TEXT AFTER!
//Construct the BufferedWriter object
bufferedWriter = new BufferedWriter(new FileWriter(filename));
//Start writing to the output stream
bufferedWriter.append("u" + desiredUsername.getText());
bufferedWriter.newLine();
bufferedWriter.append("g" + gender);
bufferedWriter.newLine();
} catch (Exception ex) {
ex.printStackTrace();
System.out.println("Name already exists.");
} finally {
//Close the BufferedWriter
try {
if (bufferedWriter != null) {
bufferedWriter.flush();
bufferedWriter.close();
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
showCharacterCreationScreen();
}
}
答案 0 :(得分：1)
首先，在startScreenInfo（）方法中有两个具有相同参数的actionPerformed方法。那可能是你的问题。
您实际上在一个方法中放置了一些其他actionPerformed方法。尝试将您的actionPerformed方法合并为一个，看看是否有效。
根据对以下问题的第二个回复，如果在一个包中有两个具有相同名称的类，或者可能有两个具有相同名称和参数的方法，则会发生该错误：Reference
如果这是问题，我不是100％，但它可能会帮助你。