问题不在于创建 jar 文件，而在于使其工作。因为我使用 Java 3D，所以我需要 jar 文件来获取 Java 3D 类，但我似乎无法让它工作。我已经正确设置了类路径，并且还尝试使用
在 list txt 中设置类路径Class-Path: C:\Program Files\Java\Java3D\1.5.2\lib\ext\j3dcore.jar;C:\Program Files\Java\Java3D\1.5.2\lib\ext\j3dutils.jar;C:\Program Files\Java\Java3D\1.5.2\lib\ext\vecmath.jar;C:\Users\Censored\Documents\NetBeansProjects\Java24\build\classes\Game\Main.class
我不知道我是否在 list 文件中做错了什么，因为当我在 Class-Path: 之后按两次 enter 时，我得到了这个错误:
Error: Could not find or load main class Main
但是如果我在 Class-Path: 之后的任何时候都不按回车键，我会得到这个错误:
Exception in thread "main" java.lang.NoClassDefFoundError: javax/media/j3d/Canvas3D
或者我在主要方法中做错了什么？
这是我的洞码:
import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.universe.SimpleUniverse;
import java.awt.*;
import java.awt.event.*;
import javax.media.j3d.*;
import javax.swing.*;
import javax.vecmath.*;
public class Main extends JFrame implements ActionListener{
private Image image;
private Timer timer;
private BallJump ball;
private ThisPanel panel;
private boolean inMenu = true;
public static void main(String[] args){
Main m = new Main();
}
public Main(){
setFocusable(true);
ImageIcon ii = new ImageIcon("Ball Jump.png");
panel = new ThisPanel();
ball = new BallJump();
image = ii.getImage();
timer = new Timer(5,this);
timer.start();
setSize(600,600);
add(panel);
setVisible(true);
setLocationRelativeTo(null);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public void actionPerformed(ActionEvent e){
setVisible(true);
repaint();
}
private class ThisPanel extends JPanel{
public ThisPanel(){
InputMap im = getInputMap(WHEN_IN_FOCUSED_WINDOW);
ActionMap am = getActionMap();
im.put(KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, 0, false), "pressed");
im.put(KeyStroke.getKeyStroke(KeyEvent.VK_SPACE, 0, true), "released");
am.put("pressed", new AbstractAction() {
@Override
public void actionPerformed(ActionEvent e) {
if(inMenu == true){
inMenu = false;
remove(panel);
ball.setAlive(true);
add(ball);
setVisible(true);
}
if (ball.isAlive() != true){
setSize(600,600);
setVisible(true);
repaint();
remove(ball);
ball = new BallJump();
add(ball);
repaint();
}
}
});
am.put("released", new AbstractAction() {
@Override
public void actionPerformed(ActionEvent e) {
if(inMenu == true){
inMenu = false;
remove(panel);
ball.setAlive(true);
add(ball);
setVisible(true);
}
if (ball.isAlive() != true){
remove(ball);
ball = new BallJump();
add(ball);
setVisible(true);
repaint();
}
}
});
setFocusable(true);
requestFocusInWindow();
}
public Dimension getPreferredSize() {
return new Dimension(600, 600);
}
@Override
public void paintComponent(Graphics g){
super.paintComponent(g);
if(inMenu == true){
Graphics2D g2D = (Graphics2D) g;
g2D.drawImage(image, 0, 0, this);
}
}
}
}
class BallJump extends JPanel implements ActionListener,KeyListener{
private TransformGroup objTrans,objTrans2, objTrans3, objTrans4, objTrans5, objTrans6, objTrans7;
private Transform3D trans = new Transform3D();
private BranchGroup objRoot = new BranchGroup();
private BranchGroup objRoot2 = new BranchGroup();
private BranchGroup objRoot3 = new BranchGroup();
private BranchGroup objRoot4 = new BranchGroup();
private BranchGroup objRoot5 = new BranchGroup();
private BranchGroup objRoot6 = new BranchGroup();
private BranchGroup objRoot7 = new BranchGroup();
private SimpleUniverse u;
private Canvas3D c;
private BranchGroup scene, scene2, scene3, scene4, scene5, scene6, scene7;
private Sphere sphere, sphere2, sphere3, sphere4, sphere5, sphere6, sphere7;
private float height = 0.0f, sign = 1.0f, xloc = 0.0f;
private float height2 = 0.0f, sign2 = -1.0f;
private float rightX, right, rightDx, leftX, left, leftDx, rightX2, leftX2;
private boolean isAlive = true;
private JLabel scoreLabel;
private JLabel label;
private int score = 0;
private Timer timer;
private boolean isEndscreen = true;
public boolean isAlive(){
return isAlive;
}
public void setAlive(boolean isAlive){
this.isAlive = isAlive;
}
public BranchGroup createSceneGraph(){
Color3f ambientColourRSphere = new Color3f(0.6f,0.0f,0.0f);
Color3f emissiveColourRSphere = new Color3f(0.0f,0.0f,0.0f);
Color3f diffuseColourRSphere = new Color3f(0.8f,0.0f,0.4f);
Color3f specularColourRSphere = new Color3f(0.3f,0.0f,0.0f);
float shininessRSphere = 20.0f;
Appearance redSphereApp = new Appearance();
redSphereApp.setMaterial(new Material(ambientColourRSphere,emissiveColourRSphere,
diffuseColourRSphere,specularColourRSphere,shininessRSphere));
objRoot.setCapability(BranchGroup.ALLOW_DETACH);
objTrans = new TransformGroup();
objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
objRoot.addChild(objTrans);
sphere = new Sphere(0.15f,redSphereApp);
objTrans = new TransformGroup();
objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
Transform3D pos1 = new Transform3D();
pos1.setTranslation(new Vector3f(0.0f,0.0f,0.0f));
objTrans.setTransform(pos1);
objTrans.addChild(sphere);
objRoot.addChild(objTrans);
BoundingSphere bounds = new BoundingSphere
(new Point3d(0.0,0.0,0.0),100.0);
Color3f light1Color = new Color3f(0.2f,0.2f,1.0f);
Vector3f light1Direction = new Vector3f(+4.0f,-7.0f,-12.0f);
DirectionalLight light1 = new DirectionalLight
(light1Color,light1Direction);
light1.setInfluencingBounds(bounds);
objRoot.addChild(light1);
Color3f ambientColor = new Color3f(1.0f,1.0f,1.0f);
AmbientLight ambientLightNode = new AmbientLight(ambientColor);
ambientLightNode.setInfluencingBounds(bounds);
objRoot.addChild(ambientLightNode);
Color3f bgColor = new Color3f(0.0f, 0.2f, 1.0f);
Background bg = new Background(bgColor);
bg.setApplicationBounds(bounds);
objRoot.addChild(bg);
return objRoot;
}
public BranchGroup createSceneGraph2(){
objRoot2.setCapability(BranchGroup.ALLOW_DETACH);
objTrans2 = new TransformGroup();
objTrans2.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
objRoot2.addChild(objTrans2);
sphere2 = new Sphere(0.18f);
objTrans2 = new TransformGroup();
objTrans2.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
Transform3D pos1 = new Transform3D();
pos1.setTranslation(new Vector3f(0.0f,0.0f,0.0f));
objTrans2.setTransform(pos1);
objTrans2.addChild(sphere2);
objRoot2.addChild(objTrans2);
return objRoot2;
}
public BranchGroup createSceneGraph3(){
objRoot3.setCapability(BranchGroup.ALLOW_DETACH);
objTrans3 = new TransformGroup();
objTrans3.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
objRoot3.addChild(objTrans3);
sphere3 = new Sphere(0.18f);
objTrans3 = new TransformGroup();
objTrans3.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
Transform3D pos1 = new Transform3D();
pos1.setTranslation(new Vector3f(0.0f,0.0f,0.0f));
objTrans3.setTransform(pos1);
objTrans3.addChild(sphere3);
objRoot3.addChild(objTrans3);
return objRoot3;
}
public BranchGroup createSceneGraph4(){
objRoot4.setCapability(BranchGroup.ALLOW_DETACH);
objTrans4 = new TransformGroup();
objTrans4.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
objRoot4.addChild(objTrans4);
sphere4 = new Sphere(0.45f);
objTrans4 = new TransformGroup();
objTrans4.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
Transform3D pos1 = new Transform3D();
pos1.setTranslation(new Vector3f(0.0f,0.0f,0.0f));
objTrans4.setTransform(pos1);
objTrans4.addChild(sphere4);
objRoot4.addChild(objTrans4);
return objRoot4;
}
public BranchGroup createSceneGraph5(){
objRoot5.setCapability(BranchGroup.ALLOW_DETACH);
objTrans5 = new TransformGroup();
objTrans5.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
objRoot5.addChild(objTrans5);
sphere5 = new Sphere(0.45f);
objTrans5 = new TransformGroup();
objTrans5.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
Transform3D pos1 = new Transform3D();
pos1.setTranslation(new Vector3f(0.0f,0.0f,0.0f));
objTrans5.setTransform(pos1);
objTrans5.addChild(sphere5);
objRoot5.addChild(objTrans5);
return objRoot5;
}
public BranchGroup createSceneGraph6(){
objRoot6.setCapability(BranchGroup.ALLOW_DETACH);
objTrans6 = new TransformGroup();
objTrans6.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
objRoot6.addChild(objTrans6);
sphere6 = new Sphere(0.18f);
objTrans6 = new TransformGroup();
objTrans6.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
Transform3D pos1 = new Transform3D();
pos1.setTranslation(new Vector3f(0.0f,0.0f,0.0f));
objTrans6.setTransform(pos1);
objTrans6.addChild(sphere6);
objRoot6.addChild(objTrans6);
return objRoot6;
}
public BranchGroup createSceneGraph7(){
objRoot7.setCapability(BranchGroup.ALLOW_DETACH);
objTrans7 = new TransformGroup();
objTrans7.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
objRoot7.addChild(objTrans7);
sphere7 = new Sphere(0.18f);
objTrans7 = new TransformGroup();
objTrans7.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
Transform3D pos1 = new Transform3D();
pos1.setTranslation(new Vector3f(0.0f,0.0f,0.0f));
objTrans7.setTransform(pos1);
objTrans7.addChild(sphere7);
objRoot7.addChild(objTrans7);
return objRoot7;
}
BallJump(){
setFocusable(true);
setLayout(new BorderLayout());
setVisible(true);
GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();
c = new Canvas3D(config);
Color color = new Color(0.0f, 0.2f, 1.0f);
setBackground(color);
scoreLabel = new JLabel("Score: " + score);
scoreLabel.setBackground(color);
add(BorderLayout.PAGE_START,scoreLabel);
add("Center",c);
c.addKeyListener(this);
c.setSize(585,560);
timer = new Timer(60,this);
timer.setInitialDelay(100);
timer.start();
scene = createSceneGraph();
scene2 = createSceneGraph2();
scene3 = createSceneGraph3();
scene4 = createSceneGraph4();
scene5 = createSceneGraph5();
scene6 = createSceneGraph6();
scene7 = createSceneGraph7();
u = new SimpleUniverse(c);
u.getViewingPlatform().setNominalViewingTransform();
u.addBranchGraph(scene);
u.addBranchGraph(scene2);
u.addBranchGraph(scene3);
u.addBranchGraph(scene4);
u.addBranchGraph(scene5);
u.addBranchGraph(scene6);
u.addBranchGraph(scene7);
float randomSpawn1 = (float) Math.random() * -3.7f + -4.1f;
float randomSpawn2 = (float) Math.random() * 2.5f + 3.1f;
float randomSpawn3 = (float) Math.random() * -2.7f + -5.1f;
float randomSpawn4 = (float) Math.random() * 2.5f + 4.1f;
float randomSpawn5 = (float) Math.random() * -5.7f + -15.1f;
float randomSpawn6 = (float) Math.random() * 5.7f + 18.1f;
rightX = randomSpawn2;
right = randomSpawn4;
leftX = randomSpawn1;
left = randomSpawn3;
rightX2 = randomSpawn6;
leftX2 = randomSpawn5;
rightDx = -.05f;
leftDx = .05f;
}
public void keyPressed(KeyEvent e){
if(e.getKeyChar() == 'd'|e.getKeyChar() == 'D'|e.getKeyCode() == e.VK_RIGHT){
xloc = xloc + .1f;
}
if(e.getKeyChar() == 'a'|e.getKeyChar() == 'A'|e.getKeyCode() == e.VK_LEFT){
xloc = xloc - .1f;
}
}
public void keyReleased(KeyEvent e){
}
public void keyTyped(KeyEvent e){
}
public void actionPerformed(ActionEvent e){
height += .1f * sign;
if(Math.abs(height * 2) >= 1)
sign = -1.0f * sign;
height2 += .1f * sign2;
if(Math.abs(height2 * 2) >= 1)
sign2 = -1.0f * sign2;
Vector3d vec;
int thing = 1;
int thing2 = 2;
if(height < -.4f){
vec = new Vector3d(1.0,.7,1.0);
}else{
vec = new Vector3d(1.0,1.0,1.0);
thing = 2;
}
trans.setScale(vec);
trans.setTranslation(new Vector3f(xloc,height - .15f,0.0f));
objTrans.setTransform(trans);
if(height < -.10f){
vec = new Vector3d(1.0,1.0,1.0);
thing2 = 1;
}
if(height < -.4f){
trans.setScale(new Vector3d(1.0,1.0,1.0));
}
if(score >= 1000){
rightDx = -.06f;
leftDx = .06f;
}
if(score >= 2000){
rightDx = -.07f;
leftDx = .07f;
}
if(score >= 4000){
rightDx = -.08f;
leftDx = .08f;
}
if(score >= 5000){
rightDx = -.09f;
leftDx = .09f;
}
if(score >= 10000){
rightDx = -.1f;
leftDx = .1f;
}
if(score >= 15000){
rightDx = -.12f;
leftDx = .12f;
}
Vector3f vector = new Vector3f(rightX += rightDx,-.7f,0.0f);
trans.setTranslation(vector);
objTrans2.setTransform(trans);
Vector3f vector2 = new Vector3f(leftX += leftDx,-.7f,0.0f);
trans.setTranslation(vector2);
objTrans3.setTransform(trans);
Vector3f vector3 = new Vector3f(rightX2 += rightDx,-.4f,0.0f);
trans.setTranslation(vector3);
objTrans4.setTransform(trans);
Vector3f vector4 = new Vector3f(leftX2 += leftDx,-.4f,0.0f);
trans.setTranslation(vector4);
objTrans5.setTransform(trans);
Vector3f vector5 = new Vector3f(right += rightDx,-.7f,0.0f);
trans.setTranslation(vector5);
objTrans6.setTransform(trans);
Vector3f vector6 = new Vector3f(left += leftDx,-.7f,0.0f);
trans.setTranslation(vector6);
objTrans7.setTransform(trans);
float leftXDistance = vector2.x - xloc - .22f;
float leftXDistancez = vector6.x - xloc - .22f;
float leftXDistance2 = vector4.x - xloc;
float yDistance2 = -.5f - height;
float xDistance2 = vector3.x - xloc;
float xDistance = vector.x - xloc + .22f;
float yDistance = -.7f - height;
float xDistance3 = vector5.x - xloc + .22f;
double leftdistance = Math.sqrt((leftXDistance * leftXDistance) + (yDistance * yDistance));
double leftdistancez = Math.sqrt((leftXDistancez * leftXDistancez) + (yDistance * yDistance));
double leftdistance2 = Math.sqrt((leftXDistance2 * leftXDistance2) + (yDistance2 * yDistance2));
double distance2 = Math.sqrt((xDistance2 * xDistance2) + (yDistance2 * yDistance2));
double distance = Math.sqrt((xDistance * xDistance) + (yDistance * yDistance));
double distance3 = Math.sqrt((xDistance3 * xDistance3) + (yDistance * yDistance));
if(distance < vec.x / 2 + .09f){
if(thing == 2){
score += 100;
scoreLabel.setText("Score: " + score);
float randomSpawn = (float) Math.random() * 2.5f + 3.1f;
rightX = randomSpawn;
trans.setTranslation(vector);
objTrans2.setTransform(trans);
}
if(thing == 1){
objRoot.detach();
setAlive(false);
isAlive = false;
isEndscreen = false;
}
}
if(leftdistance < vec.x / 2 + .09f){
if(thing == 2){
score += 100;
scoreLabel.setText("Score: " + score);
float randomSpawn = (float) Math.random() * -2.7f + -3.3f;
leftX = randomSpawn;
trans.setTranslation(vector2);
objTrans3.setTransform(trans);
}
if(thing == 1){
objRoot.detach();
setAlive(false);
isAlive = false;
isEndscreen = false;
}
}
if(leftdistancez < vec.x / 2 + .09f){
if(thing == 2){
score += 100;
scoreLabel.setText("Score: " + score);
float randomSpawn = (float) Math.random() * -2.5f + -3.1f;
left = randomSpawn;
trans.setTranslation(vector6);
objTrans7.setTransform(trans);
}
if(thing == 1){
objRoot.detach();
setAlive(false);
isAlive = false;
isEndscreen = false;
}
}
if(leftdistance2 < vec.x / 2 + .09f){
if(thing == 2){
score += 200;
scoreLabel.setText("Score: " + score);
float randomSpawn = (float) Math.random() * -4.5f + -12.1f;
leftX2 = randomSpawn;
trans.setTranslation(vector4);
objTrans5.setTransform(trans);
}
if(thing == 1){
objRoot.detach();
setAlive(false);
isAlive = false;
isEndscreen = false;
}
}
if(distance2 < vec.x / 2 + .09f){
if(thing == 2){
score += 200;
scoreLabel.setText("Score: " + score);
float randomSpawn = (float) Math.random() * 4.5f + 15.1f;
rightX2 = randomSpawn;
trans.setTranslation(vector3);
objTrans4.setTransform(trans);
}
if(thing == 1){
objRoot.detach();
setAlive(false);
isAlive = false;
isEndscreen = false;
}
}
if(distance3 < vec.x / 2 + .09f){
if(thing == 2){
score += 100;
scoreLabel.setText("Score: " + score);
float randomSpawn = (float) Math.random() * 2.5f + 3.1f;
right = randomSpawn;
trans.setTranslation(vector5);
objTrans6.setTransform(trans);
}
if(thing == 1){
objRoot.detach();
isAlive = false;
isEndscreen = false;
}
}
if(rightX < -1.5f){
float randomSpawn = (float) Math.random() * 1.5f + 2.1f;
rightX = randomSpawn;
trans.setTranslation(vector);
objTrans2.setTransform(trans);
}
if(leftX > 1.5f){
float randomSpawn = (float) Math.random() * -1.5f + -2.1f;
leftX = randomSpawn;
trans.setTranslation(vector2);
objTrans3.setTransform(trans);
}
if(right < -1.5f){
float randomSpawn = (float) Math.random() * 1.5f + 2.1f;
right = randomSpawn;
trans.setTranslation(vector);
objTrans2.setTransform(trans);
}
if(left > 1.5f){
float randomSpawn = (float) Math.random() * -1.5f + -2.1f;
left = randomSpawn;
trans.setTranslation(vector2);
objTrans3.setTransform(trans);
}
if(rightX2 < -1.5f){
float randomSpawn = (float) Math.random() * 1.5f + 2.1f;
rightX2 = randomSpawn;
trans.setTranslation(vector3);
objTrans4.setTransform(trans);
}
if(leftX2 > 1.5f){
float randomSpawn = (float) Math.random() * -1.5f + -2.1f;
leftX2 = randomSpawn;
trans.setTranslation(vector4);
objTrans5.setTransform(trans);
}
if(xloc > .8f){
xloc = .8f;
}
if(xloc < -.8f){
xloc = -.8f;
}
if(!isAlive && !isEndscreen){
endScreen();
timer.stop();
score = 0;
}
}
public void endScreen(){
isEndscreen = true;
remove(scoreLabel);
remove(c);
setVisible(true);
setLayout(new BorderLayout(1,1));
Font font = new Font("Helvatica",Font.BOLD,24);
label = new JLabel(" Your Score: " + score);
JLabel label2 = new JLabel("Press Space To Restart");
label2.setFont(font);
label.setFont(font);
setBackground(Color.white);
add(BorderLayout.NORTH,label);
add(BorderLayout.CENTER,label2);
repaint();
}
}
这是我的 list txt:
Main-Class: Main
Class-Path: C:\Program Files\Java\Java3D\1.5.2\lib\ext\j3dcore.jar;C:\Program Files\Java\Java3D\1.5.2\lib\ext\j3dutils.jar;C:\Program Files\Java\Java3D\1.5.2\lib\ext\vecmath.jar;C:\Users\Censored\Documents\NetBeansProjects\Java24\build\classes\Game\Main.class
最佳答案
我刚遇到这个问题，我认为它与包名称有关。尝试将主类的名称更改为不带空格的包名称
关于java - jar文件的问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/16065001/