所以我在本季度的第一个编程课程中，我决定测试到目前为止学到的东西并创建我的第一个游戏！我完成了一个纯粹基于文本的游戏，让用户对抗计算机，攻击防御和逃避试图将计算机生命点降低到零。
我想在游戏中添加某种视觉动画，我似乎无法找到一种方法来制作它，以便当用户按下buttonPanel上的按钮时，会出现一个特定的动画。
目标是让人和计算机的默认图像站在战场上，然后当你按下一个按钮时，新的帧将依次显示动画，然后我希望再次显示默认图像。
我构建了一个BattleGame类，然后是一个扩展BattleGame的RolePlay类。
我的问题是：为什么我运行程序时根本不会出现图像。我尝试将animation（）方法放在attack（）方法中，但仍然无法正常工作。动画根本没有出现。我知道问题出在animation（）方法中。我只是不知道为什么它不起作用。
http://i1209.photobucket.com/albums/cc400/squaredcorn/program_zps23d42f2d.png
第一块代码是我正在尝试创建的动画方法。剩下的就是整个BattleGame课程。 “动画方法就在actionPerformed之后
感谢您的帮助，我知道很多代码，但我真的很绝望，我不确定为什么它不起作用''（
public Image[] frames = new Image[3];
public void animation() {
try {
frames[0] = ImageIO.read(new File("1.png"));
frames[1] = ImageIO.read(new File("2.png"));
frames[2] = ImageIO.read(new File("3.png"));
}
catch (Exception e) { }
JPanel gui = new JPanel(new BorderLayout());
final JLabel attackAnimation = new JLabel(new ImageIcon(frames[0]));
gui.add(attackAnimation, BorderLayout.EAST);
int index = 0;
if(index < frames.length){
index++;
if(index > frames.length) index = 0;
}
attackAnimation.setIcon(new ImageIcon(frames[index]));
final Timer timer = new Timer(200, this);
if(index >= 0){
timer.start();
}
else {
timer.stop();
}
}
import java.awt.Color;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.text.*;
import java.io.*;
import javax.imageio.ImageIO;
public abstract class BattleGame extends JFrame implements ActionListener
{
private JTextField[] fields;
public JTextArea display;
private JButton attackBtn;
private JButton blockBtn;
private JButton dodgeBtn;
private JButton fleeBtn;
/* Helper objects for simplifying common tasks */
public StringBuilder output = new StringBuilder(128);
public NumberFormat decimalFormat = new DecimalFormat("0.00");
public NumberFormat currencyFormat = NumberFormat.getCurrencyInstance();
public NumberFormat percentFormat = NumberFormat.getPercentInstance();
public DateFormat dateFormat = DateFormat.getDateInstance();
// constructor
public BattleGame(String... prompts)
{
super("Display Frame");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setSize(1000,750);
// store the number of prompts in a simple short variable
int rows = prompts.length;
JPanel entryPanel = new JPanel();
entryPanel.setLayout(new GridLayout(rows,2,4,4));
// create a new empty array of JTextFields where the number of
// elements is set to the number of rows
fields = new JTextField[rows];
// Use a standard for loop to build the entryPanel
for(int i = 0; i < rows; i++)
{
fields[i] = new JTextField(10);
entryPanel.add(new JLabel(prompts[i] + ":", JLabel.RIGHT));
entryPanel.add(fields[i]);
}
display = new JTextArea(7,50);
JScrollPane displayPane = new JScrollPane(display);
ImageIcon attackPicture = new ImageIcon("AttackButton.jpg");//start attack button with Icon
attackBtn = new JButton(attackPicture);//end attack Button with Icon
ImageIcon blockPicture = new ImageIcon("BlockButton.jpg");//start block button with Icon
blockBtn = new JButton(blockPicture);//end block button with Icon
ImageIcon dodgePicture = new ImageIcon("EvadeButton.jpg");//start dodge button with Icon
dodgeBtn = new JButton(dodgePicture);//end dodge button with Icon
ImageIcon fleePicture = new ImageIcon("FleeButton.jpg");//start flee button with Icon
fleeBtn = new JButton(fleePicture);//end flee button with Icon
JLabel animation = new JLabel();
attackBtn.addActionListener(this);
blockBtn.addActionListener(this);
dodgeBtn.addActionListener(this);
fleeBtn.addActionListener(this);
JPanel buttonPanel = new JPanel();
buttonPanel.add(attackBtn);
buttonPanel.add(blockBtn);
buttonPanel.add(dodgeBtn);
buttonPanel.add(fleeBtn);
add(animation, BorderLayout.EAST);
add(entryPanel, BorderLayout.NORTH);
add(displayPane, BorderLayout.WEST);
add(buttonPanel, BorderLayout.SOUTH);
//setVisible(true);
} // end constructor
public void actionPerformed(ActionEvent event)
{
if (event.getSource() == attackBtn)
{
// make sure all run-time errors are caught and handled by putting
// the run method in a try-catch block.
try {
attack();
display.setText(output.toString());
}
catch (Exception error) {
display.setText("There is a problem " + error.getMessage());
}
}
if (event.getSource() == blockBtn)
{
// make sure all run-time errors are caught and handled by putting
// the run method in a try-catch block.
try {
block();
display.setText(output.toString());
}
catch (Exception error) {
display.setText("There is a problem " + error.getMessage());
}
}
if (event.getSource() == dodgeBtn)
{
// make sure all run-time errors are caught and handled by putting
// the run method in a try-catch block.
try {
dodge();
display.setText(output.toString());
}
catch (Exception error) {
display.setText("There is a problem " + error.getMessage());
}
}
if (event.getSource() == fleeBtn)
{
// make sure all run-time errors are caught and handled by putting
// the run method in a try-catch block.
try {
flee();
display.setText(output.toString());
}
catch (Exception error) {
display.setText("There is a problem " + error.getMessage());
}
}
} // end actionPerformed()
public void clearOutput() {
getOutput().setLength(0);
getDisplay().setText("");
}
////////////////////////////////////////////////////
public Image[] frames = new Image[3];
public void animation() {
try {
frames[0] = ImageIO.read(new File("1.png"));
frames[1] = ImageIO.read(new File("2.png"));
frames[2] = ImageIO.read(new File("3.png"));
}
catch (Exception e) { }
JPanel gui = new JPanel(new BorderLayout());
final JLabel attackAnimation = new JLabel(new ImageIcon(frames[0]));
gui.add(attackAnimation, BorderLayout.EAST);
int index = 0;
if(index < frames.length){
index++;
if(index > frames.length) index = 0;
}
attackAnimation.setIcon(new ImageIcon(frames[index]));
final Timer timer = new Timer(200, this);
if(index >= 0){
timer.start();
}
else {
timer.stop();
}
}
////////////////////////////////////////////////////
public JTextArea getDisplay() {
return display;
}
/** @return output object */
public StringBuilder getOutput() {
return output;
}
// set method for fields
public void setField(int index, String text)
{
fields[index].setText(text);
}
// get method for fields
public String getField(int index)
{
// get the text from the field and return it to the caller
return fields[index].getText();
}
public int getFieldAsInt(int index)
{
// convert the text to an int and return it to the caller
return Integer.parseInt(getField(index));
}
public double getFieldAsDouble(int index)
{
// convert text to a double and return it to the caller
return Double.parseDouble(getField(index));
}
/**
* This method builds the output string that will eventually be displayed
* in the text area as the final problem solution report.
* @param value value will be appended to the StringBuilder object with a
* new line character at the end.
*/
public void addOutput(String value)
{
output.append(value);
output.append("\n");
}
// a python-like print method that takes any kind of object
public void print(Object obj)
{
System.out.println(obj);
}
// run must be implemented in all subclasses
public abstract void attack();
public abstract void block();
public abstract void dodge();
public abstract void flee();
} // end class
答案 0 :(得分：1)
frames[0] = ImageIO.read(new File("1.png"));
到部署时，这些资源可能会成为embedded-resource。在这种情况下，必须通过URL而不是File访问资源。有关标记的信息，请参阅info page，了解构建网址的方法。
一般提示：更改表格的代码：
catch (Exception e) {
..
为：
catch (Exception e) {
e.printStackTrace(); // very informative!
..
答案 1 :(得分：1)
我只是在代码中尝试了这种格式，我仍然得到错误，任何想法为什么它不会找到图像？ -
URL frames[0] = this.getClass().getResource("C:/Users/Connor/jGrasp/1.png");
保持简短，使用
Image img = ImageIO.read(getClass().getResource("1.png"));
你已经说过你的图像与课程在同一个包中..让它们保持在那里。
ProjectRoot
src
mypackage
MyClass.java
1.png
另请注意，在animation方法中，您创建了一个JPanel gui，其中添加了图片标签，但您永远不会将gui添加到任何内容中。