質問編集履歴
4
コードの変更
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@@ -216,33 +216,7 @@
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(int)(2*b2.c(r)), (int)(2*b2.c(r)));
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}
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BallPropagator.dt=0.1;
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JFrame frame = new JFrame();
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BallMain panel = new BallMain(500,400);panel.setBackground(Color.white);panel.setPreferredSize(new Dimension(panel.xPanelSize, panel.yPanelSize));
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BallPropagator.xmin = 0;
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BallPropagator.xmax = panel.xPanelSize;
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BallPropagator.ymin = 0;
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BallPropagator.ymax = panel.yPanelSize;
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frame.pack();
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//
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frame.setTitle("反射するボール");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setResizable(true);
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frame.setVisible(true);
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Timer timer = new Timer(10, panel);
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timer.start();
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}
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}
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```
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```
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3
情報の追加
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body
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@@ -2,6 +2,8 @@
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2
2
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画面に出てきているボタンを押すと出力するようにしたいです。
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3
3
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ここに質問の内容を詳しく書いてください。
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4
4
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現在、自学でjavaをやっています。今回、最終的にボタンを押すとボールがその方向に加速するというプログラムを作ろうと思っています。ですが途中でボタンを押しても反応しなくなりました。なぜなのかわからないので教えていただきたいです
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+
Sample.javaでコンパイルするとボタンが反応しないです
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+
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5
7
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■■な機能を実装中に以下のエラーメッセージが発生しました。
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8
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9
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2
付属のソースコードを追加しました
title
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body
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@@ -11,6 +11,7 @@
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11
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java
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ソースコード
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13
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```
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+
//Sample.java
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import java.awt.*;
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import java.awt.event.*;
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import javax.swing.*;
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@@ -21,22 +22,22 @@
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static int yPanelSize;
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double x,y,r,vx,vy,ax,ay;
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-
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+
BallPropagator b1;
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-
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+
BallPropagator b2;
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Color c1;
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Color c2;
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static JButton btn1 = new JButton("↑");
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static JButton btn2 = new JButton("↓");
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static JButton btn3 = new JButton("→");
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static JButton btn4 = new JButton("←");
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-
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+
Sample(int xPanelSize, int yPanelSize){
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this.xPanelSize = xPanelSize;
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this.yPanelSize = yPanelSize;
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38
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38
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-
b1 = new
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+
b1 = new BallPropagator(10, 100, 100, 30, 40, 0, 9.8);
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-
b2 = new
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+
b2 = new BallPropagator(10, 10, 100, 50, 20, 0, 9.8); /////////////////////////////////////////////
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40
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c1=Color.black;
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c2=Color.blue;
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/////////////////////////////////////////////
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@@ -113,13 +114,13 @@
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public static void main(String[] args) {
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-
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+
BallPropagator.dt=0.1;
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JFrame frame = new JFrame();
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-
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+
BallMain panel = new BallMain(500,400);
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panel.setBackground(Color.white);
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panel.setPreferredSize(new Dimension(xPanelSize,yPanelSize));
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@@ -128,10 +129,10 @@
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panel.add(btn3);
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panel.add(btn4);
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-
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132
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+
BallPropagator.xmin = 0;
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-
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BallPropagator.xmax = panel.xPanelSize;
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-
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+
BallPropagator.ymin = 0;
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-
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BallPropagator.ymax = panel.yPanelSize;
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frame.add(panel);
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@@ -150,29 +151,29 @@
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150
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}
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```
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```
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-
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154
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+
//BallMain.java
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import java.awt.*;
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155
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import java.awt.event.*;
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import javax.swing.*;
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158
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158
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-
public class
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159
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+
public class BallMain extends JPanel implements ActionListener{
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static int xPanelSize;
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static int yPanelSize;
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double x,y,r,vx,vy,ax,ay;
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-
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+
BallPropagator b1;
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-
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+
BallPropagator b2;
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|
Color c1;
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Color c2;
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-
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+
BallMain (int xPanelSize, int yPanelSize){
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|
this.xPanelSize = xPanelSize;
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this.yPanelSize = yPanelSize;
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173
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-
b1 = new
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+
b1 = new BallPropagator (10, 100, 100, 30, 40, 0, 9.8);
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175
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-
b2 = new
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+
b2 = new BallPropagator (10, 10, 100, 50, 20, 0, 9.8);
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177
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c1=Color.black;
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c2=Color.blue;
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@@ -216,19 +217,19 @@
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public static void main(String[] args) {
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-
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BallPropagator.dt=0.1;
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221
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222
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JFrame frame = new JFrame();
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-
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+
BallMain panel = new BallMain(500,400);panel.setBackground(Color.white);panel.setPreferredSize(new Dimension(panel.xPanelSize, panel.yPanelSize));
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226
227
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228
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-
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229
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+
BallPropagator.xmin = 0;
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229
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-
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230
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+
BallPropagator.xmax = panel.xPanelSize;
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-
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+
BallPropagator.ymin = 0;
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231
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-
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232
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+
BallPropagator.ymax = panel.yPanelSize;
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234
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234
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frame.pack();
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@@ -243,6 +244,7 @@
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243
244
|
}
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245
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```
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245
246
|
```
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247
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+
//BallPropagator.java
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246
248
|
public class BallPropagator_19rd158{
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249
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248
250
|
public static double dt;
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|
@@ -259,7 +261,7 @@
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259
261
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260
262
|
double p=0.8;
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261
263
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-
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264
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+
BallPropagator(double r,double x,double y,double vx,double vy,double ax,double ay){
|
|
263
265
|
this.r=r;
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264
266
|
this.x=x;
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265
267
|
this.y=y;
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@@ -273,11 +275,11 @@
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273
275
|
this.x = this.x + this.vx * dt;
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274
276
|
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275
277
|
if(this.x < (double)xmin+this.r ){
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276
|
-
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278
|
+
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277
279
|
this.vx *= -p;
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|
278
280
|
this.x = (double)xmin+this.r;
|
|
279
281
|
}else if((double)xmax-this.r < x ){
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280
|
-
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282
|
+
|
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281
283
|
this.vx *= -p;
|
|
282
284
|
this.x = (double)xmax-this.r;
|
|
283
285
|
}
|
1
付属のソースコードを追加しました
title
CHANGED
|
File without changes
|
body
CHANGED
|
@@ -10,7 +10,7 @@
|
|
|
10
10
|
|
|
11
11
|
java
|
|
12
12
|
ソースコード
|
|
13
|
-
|
|
13
|
+
```
|
|
14
14
|
import java.awt.*;
|
|
15
15
|
import java.awt.event.*;
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16
16
|
import javax.swing.*;
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|
@@ -145,17 +145,175 @@
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|
145
145
|
|
|
146
146
|
Timer timer = new Timer(10, panel);
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|
147
147
|
timer.start();
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|
148
|
+
|
|
149
|
+
}
|
|
150
|
+
}
|
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151
|
+
```
|
|
152
|
+
```
|
|
153
|
+
|
|
154
|
+
import java.awt.*;
|
|
155
|
+
import java.awt.event.*;
|
|
156
|
+
import javax.swing.*;
|
|
157
|
+
|
|
158
|
+
public class BallMain_19rd158 extends JPanel implements ActionListener{
|
|
159
|
+
|
|
160
|
+
static int xPanelSize;
|
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161
|
+
static int yPanelSize;
|
|
162
|
+
|
|
163
|
+
double x,y,r,vx,vy,ax,ay;
|
|
164
|
+
BallPropagator_19rd158 b1;
|
|
165
|
+
BallPropagator_19rd158 b2;
|
|
166
|
+
Color c1;
|
|
167
|
+
Color c2;
|
|
168
|
+
BallMain_19rd158(int xPanelSize, int yPanelSize){
|
|
169
|
+
|
|
170
|
+
this.xPanelSize = xPanelSize;
|
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171
|
+
this.yPanelSize = yPanelSize;
|
|
172
|
+
|
|
173
|
+
|
|
174
|
+
b1 = new BallPropagator_19rd158(10, 100, 100, 30, 40, 0, 9.8);
|
|
175
|
+
b2 = new BallPropagator_19rd158(10, 10, 100, 50, 20, 0, 9.8);
|
|
176
|
+
c1=Color.black;
|
|
177
|
+
c2=Color.blue;
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|
148
178
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179
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+
}
|
|
180
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+
|
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181
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+
|
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182
|
+
public void actionPerformed(ActionEvent e){
|
|
183
|
+
|
|
149
184
|
|
|
185
|
+
b1.xUpdate();
|
|
186
|
+
b1.yUpdate();
|
|
187
|
+
|
|
188
|
+
b1.vxUpdate();
|
|
189
|
+
b1.vyUpdate();
|
|
190
|
+
|
|
191
|
+
|
|
192
|
+
b2.xUpdate();
|
|
193
|
+
b2.yUpdate();
|
|
194
|
+
|
|
195
|
+
b2.vxUpdate();
|
|
196
|
+
b2.vyUpdate();
|
|
197
|
+
|
|
198
|
+
repaint();
|
|
150
199
|
}
|
|
200
|
+
|
|
201
|
+
public void paintComponent(Graphics g){
|
|
202
|
+
super.paintComponent(g);
|
|
203
|
+
|
|
204
|
+
g.setColor(c1);
|
|
205
|
+
|
|
206
|
+
g.fillOval((int)(b1.a(x) - b1.c(r)), (int)(b1.b(y) - b1.c(r)),
|
|
207
|
+
(int)(2*b1.c(r)), (int)(2*b1.c(r)));
|
|
208
|
+
|
|
209
|
+
|
|
210
|
+
g.setColor(c2);
|
|
211
|
+
|
|
212
|
+
g.fillOval((int)(b2.a(x) - b2.c(r)), (int)(b2.b(y) - b2.c(r)),
|
|
213
|
+
(int)(2*b2.c(r)), (int)(2*b2.c(r)));
|
|
214
|
+
}
|
|
215
|
+
|
|
216
|
+
public static void main(String[] args) {
|
|
217
|
+
|
|
218
|
+
|
|
219
|
+
BallPropagator_19rd158.dt=0.1;
|
|
220
|
+
|
|
221
|
+
|
|
222
|
+
JFrame frame = new JFrame();
|
|
223
|
+
|
|
224
|
+
|
|
225
|
+
BallMain_19rd158 panel = new BallMain_19rd158(500,400);panel.setBackground(Color.white);panel.setPreferredSize(new Dimension(panel.xPanelSize, panel.yPanelSize));
|
|
226
|
+
|
|
227
|
+
|
|
228
|
+
BallPropagator_19rd158.xmin = 0;
|
|
229
|
+
BallPropagator_19rd158.xmax = panel.xPanelSize;
|
|
230
|
+
BallPropagator_19rd158.ymin = 0;
|
|
231
|
+
BallPropagator_19rd158.ymax = panel.yPanelSize;
|
|
232
|
+
|
|
233
|
+
|
|
234
|
+
frame.pack();
|
|
235
|
+
//
|
|
236
|
+
frame.setTitle("反射するボール");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setResizable(true);
|
|
237
|
+
frame.setVisible(true);
|
|
238
|
+
|
|
239
|
+
|
|
240
|
+
Timer timer = new Timer(10, panel);
|
|
241
|
+
timer.start();
|
|
242
|
+
}
|
|
151
243
|
}
|
|
244
|
+
```
|
|
245
|
+
```
|
|
246
|
+
public class BallPropagator_19rd158{
|
|
247
|
+
|
|
248
|
+
public static double dt;
|
|
249
|
+
public static int xmin;
|
|
250
|
+
public static int xmax;
|
|
251
|
+
public static int ymin;
|
|
252
|
+
public static int ymax;
|
|
253
|
+
|
|
254
|
+
|
|
255
|
+
private double r;
|
|
256
|
+
private double x, y;
|
|
257
|
+
private double vx, vy;
|
|
258
|
+
private double ax, ay;
|
|
259
|
+
|
|
260
|
+
double p=0.8;
|
|
261
|
+
|
|
262
|
+
BallPropagator_19rd158(double r,double x,double y,double vx,double vy,double ax,double ay){
|
|
263
|
+
this.r=r;
|
|
264
|
+
this.x=x;
|
|
265
|
+
this.y=y;
|
|
266
|
+
this.vx=vx;
|
|
267
|
+
this.vy=vy;
|
|
268
|
+
this.ax=ax;
|
|
269
|
+
this.ay=ay;
|
|
270
|
+
}
|
|
271
|
+
|
|
272
|
+
public void xUpdate() {
|
|
273
|
+
this.x = this.x + this.vx * dt;
|
|
274
|
+
|
|
275
|
+
if(this.x < (double)xmin+this.r ){
|
|
276
|
+
// this.vx = ??????????
|
|
277
|
+
this.vx *= -p;
|
|
278
|
+
this.x = (double)xmin+this.r;
|
|
279
|
+
}else if((double)xmax-this.r < x ){
|
|
280
|
+
// this.vx = ??????????
|
|
281
|
+
this.vx *= -p;
|
|
282
|
+
this.x = (double)xmax-this.r;
|
|
283
|
+
}
|
|
284
|
+
}
|
|
285
|
+
|
|
286
|
+
public void yUpdate() {
|
|
287
|
+
this.y = this.y + this.vy * dt;
|
|
288
|
+
|
|
289
|
+
if(this.y < (double)ymin + this.r ){
|
|
290
|
+
|
|
291
|
+
this.vy *= -p;
|
|
292
|
+
this.y = (double)ymin+this.r;
|
|
293
|
+
}else if((double)ymax-this.r < this.y ){
|
|
294
|
+
|
|
295
|
+
this.vy *= -p;
|
|
296
|
+
this.y = (double)ymax-this.r;
|
|
297
|
+
}
|
|
298
|
+
}
|
|
299
|
+
|
|
300
|
+
public void vxUpdate(){
|
|
301
|
+
|
|
302
|
+
this.vx=this.ax*dt+this.vx;
|
|
152
303
|
|
|
153
|
-
|
|
154
|
-
|
|
155
|
-
|
|
304
|
+
}
|
|
156
|
-
|
|
305
|
+
|
|
157
|
-
|
|
306
|
+
public void vyUpdate(){
|
|
158
|
-
|
|
307
|
+
this.vy=this.ay*dt+this.vy;
|
|
308
|
+
|
|
309
|
+
}
|
|
310
|
+
public double a(double x){
|
|
311
|
+
return x=this.x;
|
|
312
|
+
}
|
|
313
|
+
public double b(double x){
|
|
314
|
+
return x=this.y;
|
|
159
|
-
|
|
315
|
+
} public double c(double x){
|
|
160
|
-
|
|
161
|
-
|
|
316
|
+
return x=this.r;
|
|
317
|
+
}
|
|
318
|
+
}
|
|
319
|
+
```
|