作者serveto ( )
看板java
標題[問題] decompiler
時間Thu Sep 23 09:14:34 2010
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http://www.neshkov.com/dj.html
用以上的decompiler將以下網頁的class檔反編譯
http://ngsir.netfirms.com/englishhtm/RLC.htm
(有RLC.class和circuit.class和signal.class三個類別檔)
我有疑問的是，這三個檔被decompile出來後的source code例如RLC.java :
--
<code>
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.util.EventObject;
public class RLC extends Applet
implements AdjustmentListener, ActionListener
{
public RLC()
{
}
public void init()
{
setBackground(Color.white);
setBounds(0, 0, 750, 500);
mt = new MediaTracker(this);
rcl = getImage(getCodeBase(), "rcl2.gif");
formula = getImage(getCodeBase(), "formula.gif");
formula2 = getImage(getCodeBase(), "formula2.gif");
formula3 = getImage(getCodeBase(), "formula3.gif");
mt.addImage(rcl, 1);
mt.addImage(formula, 2);
mt.addImage(formula2, 3);
mt.addImage(formula3, 4);
for(int i = 1; i <= 4; i++)
{
try
{
mt.waitForID;
}
catch(InterruptedException interruptedexception) { }
if(mt.isErrorID)
return;
}
amplitudeScrollbar = new Scrollbar(0, 8, 0, 2, 11);
frequencyScrollbar = new Scrollbar(0, 346, 0, 100, 660);
RScrollbar = new Scrollbar(0, 16, 0, 10, 100);
CScrollbar = new Scrollbar(0, 260, 0, 50, 500);
LScrollbar = new Scrollbar(0, 250, 0, 50, 500);
pause = new Button("Pause");
step = new Button("Step");
amplitudeLabel = new Label("Vo = " +
String.valueOf(amplitudeScrollbar.getValue()) + " V", 2);
frequencyLabel = new Label("f = " + String.valueOf(0.10000000000000001D *
(double)frequencyScrollbar.getValue()) + " Hz", 2);
resistanceLabel = new Label("R = " + String.valueOf(0.10000000000000001D *
(double)RScrollbar.getValue()) + " Ohm", 2);
capacitanceLabel = new Label("C = " + String.valueOf(2 *
CScrollbar.getValue()) + " microF", 2);
inductanceLabel = new Label("L = " + String.valueOf((double)Math.round(2000D
* (double)LScrollbar.getValue()) / 10000D) + " mH", 2);
dummy = new Label(" ");
offimg = createImage(getSize().width, getSize().height);
offg = offimg.getGraphics();
circuit = new Circuit(offg, offimg, rcl, formula, formula2, formula3);
circuit.Vo = amplitudeScrollbar.getValue();
circuit.omega = 0.62831999999999999D * (double)frequencyScrollbar.getValue();
circuit.R = 0.10000000000000001D * (double)RScrollbar.getValue();
circuit.C = 1.9999999999999999E-006D * (double)CScrollbar.getValue();
circuit.L = 0.00020000000000000001D * (double)LScrollbar.getValue();
amplitudeScrollbar.addAdjustmentListener(this);
frequencyScrollbar.addAdjustmentListener(this);
RScrollbar.addAdjustmentListener(this);
CScrollbar.addAdjustmentListener(this);
LScrollbar.addAdjustmentListener(this);
pause.addActionListener(this);
step.addActionListener(this);
signal = new Signal(circuit);
Panel panel = new Panel();
GBC = new GridBagConstraints();
GB = new GridBagLayout();
panel.setLayout(G;
GBC.fill = 2;
GBC.insets = new Insets(3, 3, 3, 3);
GBC.ipadx = 10;
GBC.gridx = 0;
GBC.gridy = 0;
GB.setConstraints(amplitudeLabel, GBC);
panel.add(amplitudeLabel);
GBC.ipadx = 30;
GBC.gridx = 1;
GB.setConstraints(amplitudeScrollbar, GBC);
panel.add(amplitudeScrollbar);
GBC.ipadx = 30;
GBC.gridx = 2;
GB.setConstraints(frequencyLabel, GBC);
panel.add(frequencyLabel);
GBC.ipadx = 30;
GBC.gridx = 3;
GB.setConstraints(frequencyScrollbar, GBC);
panel.add(frequencyScrollbar);
GBC.ipadx = 10;
GBC.gridx = 4;
GB.setConstraints(pause, GBC);
panel.add(pause);
GBC.gridx = 5;
GB.setConstraints(step, GBC);
panel.add(step);
GBC.gridx = 0;
GBC.gridy = 1;
GB.setConstraints(resistanceLabel, GBC);
panel.add(resistanceLabel);
GBC.gridx = 1;
GB.setConstraints(RScrollbar, GBC);
panel.add(RScrollbar);
GBC.gridx = 2;
GB.setConstraints(capacitanceLabel, GBC);
panel.add(capacitanceLabel);
GBC.gridx = 3;
GB.setConstraints(CScrollbar, GBC);
panel.add(CScrollbar);
GBC.gridx = 4;
GB.setConstraints(inductanceLabel, GBC);
panel.add(inductanceLabel);
GBC.ipadx = 30;
GBC.gridx = 5;
GB.setConstraints(LScrollbar, GBC);
panel.add(LScrollbar);
setLayout(new BorderLayout());
add(circuit, "Center");
add(panel, "South");
circuit.calculate();
signal.start();
}
public void actionPerformed(ActionEvent actionevent)
{
if(actionevent.getSource() == pause)
{
circuit.pause = !circuit.pause;
if(circuit.pause)
{
pause.setLabel("Continue");
} else
{
pause.setLabel("Pause");
circuit.step = false;
}
}
if(actionevent.getSource() == step)
{
circuit.step = true;
circuit.pause = true;
pause.setLabel("Continue");
}
}
public void adjustmentValueChanged(AdjustmentEvent adjustmentevent)
{
if(adjustmentevent.getSource() == amplitudeScrollbar)
{
amplitudeLabel.setText("Vo = " +
String.valueOf(amplitudeScrollbar.getValue()) + " V");
circuit.Vo = amplitudeScrollbar.getValue();
}
if(adjustmentevent.getSource() == frequencyScrollbar)
{
frequencyLabel.setText("f = " + String.valueOf((1.0D *
(double)frequencyScrollbar.getValue()) / 10D) + " Hz");
double d = circuit.omega;
circuit.omega = 0.62831999999999999D * (double)frequencyScrollbar.getValue();
circuit.t = (d * circuit.t) / circuit.omega;
}
if(adjustmentevent.getSource() == RScrollbar)
{
resistanceLabel.setText("R = " + String.valueOf((1.0D *
(double)RScrollbar.getValue()) / 10D) + " Ohm");
circuit.R = 0.10000000000000001D * (double)RScrollbar.getValue();
}
if(adjustmentevent.getSource() == CScrollbar)
{
capacitanceLabel.setText("C = " + String.valueOf(2 * CScrollbar.getValue()) +
" microF");
circuit.C = 1.9999999999999999E-006D * (double)CScrollbar.getValue();
}
if(adjustmentevent.getSource() == LScrollbar)
{
inductanceLabel.setText("L = " + String.valueOf((double)Math.round(2000D *
(double)LScrollbar.getValue()) / 10000D) + " mH");
circuit.L = 0.00020000000000000001D * (double)LScrollbar.getValue();
}
circuit.calculate();
circuit.repaint();
}
int xx;
int yy;
Label amplitudeLabel;
Label frequencyLabel;
Label resistanceLabel;
Label capacitanceLabel;
Label inductanceLabel;
Label dummy;
Scrollbar amplitudeScrollbar;
Scrollbar frequencyScrollbar;
Scrollbar RScrollbar;
Scrollbar CScrollbar;
Scrollbar LScrollbar;
Button pause;
Button step;
Circuit circuit;
Signal signal;
Graphics offg;
Image offimg;
Image rcl;
Image formula;
Image formula2;
Image formula3;
MediaTracker mt;
GridBagLayout GB;
GridBagConstraints GBC;
}
</code>
--
裡頭的circuit物件應該是屬於circuit類別檔的成員，但是一開始import部分卻沒有看到
？
是不是這個decompiler有問題，還是某種javac允許編譯過程某些物件暫時未宣告繼承來
源？
--
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◆ From: 114.44.115.138
2F：→ serveto:感謝樓上大大。我的問題是，單獨將RLC.java作編譯 09/23 09:26
3F：→ serveto:javac顯示circuit無效的type(因為沒有import) 09/23 09:27
4F：→ tkcn:我只是告訴你，那個檔案是存在的，至於為什麼不用寫 import 09/23 09:34
5F：→ tkcn:你可以再多想一下 09/23 09:36
6F：→ serveto:不好意思我是新手。現在事實上就是我用javac去執行 09/23 09:41
7F：→ serveto:作不出來 09/23 09:43
8F：推 nvidia:找個applet的文件來看 09/23 09:50