我从互联网上下载了一个Android游戏程序，我试图运行它，在Method和goto语句中出错。
我知道goto语句不支持java .. 我不知道他们是任何其他工具或语言。 我想知道他们使用的是哪种技术或工具或语言。
这是代码
package com.infraredpixel.drop.activities;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.res.Resources;
import android.graphics.RectF;
import android.hardware.Sensor;
import android.hardware.SensorManager;
import android.opengl.GLSurfaceView;
import android.os.*;
import android.util.Log;
import android.view.*;
import com.infraredpixel.drop.*;
import java.lang.reflect.Method;
import java.util.List;
// Referenced classes of package com.infraredpixel.drop.activities:
// ProfilingActivity, DebugActivity, MainMenuActivity
public class OpenGLDropActivity extends Activity
{
public OpenGLDropActivity()
{
}
private int getDefaultRotation()
{
int i;
WindowManager windowmanager;
Method amethod[];
String s;
int j;
i = 0;
windowmanager = (WindowManager)getSystemService("window");
amethod = windowmanager.getDefaultDisplay().getClass().getDeclaredMethods();
s = new String("getRotation");
j = amethod.length;
_L2:
Method method = null;
Display display;
if(i < j)
{
label0:
{
Method method1 = amethod[i];
Log.d("Methods", method1.getName());
if(!method1.getName().equals(s))
break label0;
method = method1;
}
}
display = windowmanager.getDefaultDisplay();
if(method != null)
{
int k;
try
{
k = ((Integer)method.invoke(display, new Object[0])).intValue();
}
catch(Exception exception)
{
return 0;
}
return k;
} else
{
return display.getOrientation();
}
i++;
if(true){ goto _L2;} else{ goto _L1;}
_L1:
}
protected void handleScore()
{
int i;
int j;
SharedPreferences sharedpreferences;
int k;
String s;
i = (int)(0.49F + (float)_StatusManager.dropDist());
j = (int)(0.49F + (float)_StatusManager.getStars());
sharedpreferences = getSharedPreferences("DropSettings", 0);
k = sharedpreferences.getInt("highScore", -1);
s = "";
if(2 != _ControlMode) goto _L2; else goto _L1;
_L1:
s = "tiltHighScore";
_L4:
int l = sharedpreferences.getInt(s, 0);
if(i + j > k && i + j > l)
{
_DeathDetector.setCurrentHighScore(i + j);
android.content.SharedPreferences.Editor editor = sharedpreferences.edit();
editor.putInt("highScore", -1);
editor.putInt(s, i + j);
editor.commit();
}
return;
_L2:
if(1 == _ControlMode || _ControlMode == 0)
s = "touchHighScore";
if(true) goto _L4; else goto _L3
_L3:
}
public void onCreate(Bundle bundle)
{
SharedPreferences sharedpreferences;
super.onCreate(bundle);
sharedpreferences = getSharedPreferences("DropSettings", 0);
spriteRenderer = new GLRenderer(getApplicationContext());
int i = sharedpreferences.getInt("fullScreenWidth", 480);
widthPixels = i;
int j = sharedpreferences.getInt("fullScreenHeight", 640);
RectF rectf = new RectF(0.0F, j, i, 0.0F);
boolean flag = sharedpreferences.getBoolean("useVibration", true);
boolean flag1 = sharedpreferences.getBoolean("godMode", false);
int k = sharedpreferences.getInt("ballType", 0);
int l = Math.max(sharedpreferences.getInt("highScore", 0), Math.max(sharedpreferences.getInt("tiltHighScore", 0), sharedpreferences.getInt("touchHighScore", 0)));
_ControlMode = sharedpreferences.getInt("controlMode", 2);
boolean flag2 = sharedpreferences.getBoolean("testModeDropSettings", false);
boolean flag3 = sharedpreferences.getBoolean("testModeMainSettings", false);
DropSettingsGroup adropsettingsgroup[];
DropManager dropmanager;
Handler handler;
Runnable runnable;
boolean flag4;
boolean flag5;
boolean flag6;
Runnable runnable1;
int k1;
float f;
float f1;
float f2;
float f3;
float f4;
float f5;
if(flag2)
{
adropsettingsgroup = new DropSettingsGroup[1];
adropsettingsgroup[0] = new DropSettingsGroup();
adropsettingsgroup[0].scrollSpeed = -sharedpreferences.getInt("scrollSpeed", getResources().getInteger(0x7f010000));
adropsettingsgroup[0].platformHeight = sharedpreferences.getInt("platformHeight", getResources().getInteger(0x7f050006));
adropsettingsgroup[0].platformHoleWidth = 70;
adropsettingsgroup[0].yAccel = sharedpreferences.getInt("yAcceleration", getResources().getInteger(0x7f050001));
adropsettingsgroup[0].yMaxSpeed = sharedpreferences.getInt("yMaxSpeed", getResources().getInteger(0x7f050002));
adropsettingsgroup[0].yBounce = 0.7F;
adropsettingsgroup[0].xAccel = sharedpreferences.getInt("xAcceleration", getResources().getInteger(0x7f050003));
adropsettingsgroup[0].xMaxSpeed = sharedpreferences.getInt("xMaxSpeed", getResources().getInteger(0x7f050004));
adropsettingsgroup[0].xBounce = sharedpreferences.getFloat("xBounce", 0.5F);
adropsettingsgroup[0].duration = 20F;
adropsettingsgroup[0].transitionTiles = false;
} else
if(_ControlMode == 0 || _ControlMode == 1)
adropsettingsgroup = DropSettingsGroup.getTestSettingsA();
else
adropsettingsgroup = DropSettingsGroup.getTestSettingsB();
dropmanager = new DropManager(rectf, adropsettingsgroup);
_DropManager = dropmanager;
if(flag)
_DropManager.init(spriteRenderer, getBaseContext(), k, (float)widthPixels / 320F, (Vibrator)getSystemService("vibrator"));
else
_DropManager.init(spriteRenderer, getBaseContext(), k, (float)widthPixels / 320F, null);
_StatusManager = new StatusManager();
_StatusManager.init(spriteRenderer, getBaseContext(), (float)widthPixels / 320F, rectf);
_GameOverLayer = new GameOverLayer();
_GameOverLayer.init(spriteRenderer, rectf);
handler = new Handler();
runnable = new Runnable() {
public void run()
{
handleScore();
}
final OpenGLDropActivity this$0;
{
this$0 = OpenGLDropActivity.this;
super();
}
}
;
_DeathDetector = new DeathDetector(rectf, _DropManager, _StatusManager, _GameOverLayer, handler, runnable);
_DeathDetector.setCurrentHighScore(l);
if(_ControlMode != 0) goto _L2; else goto _L1
_L1:
ControlComponent.inAirMovementFactor = 0.3F;
ControlComponent.inAirMemoryMovementFactor = 0.08F;
DropManager.speed = 1.0F;
_L4:
if(flag3)
{
k1 = sharedpreferences.getInt("movingAverageValue", 10);
f = sharedpreferences.getFloat("sensorCutoffX", 5F);
f1 = sharedpreferences.getFloat("inAirBreak", 0.3F);
f2 = sharedpreferences.getFloat("inAirMemory", 0.08F);
f3 = sharedpreferences.getFloat("gameSpeed", 1.0F);
f4 = sharedpreferences.getFloat("tiltAccelFactor", 1.0F);
f5 = sharedpreferences.getFloat("tiltAccelDiffFactor", 1.0F);
MySensorEventListener.SENSOR_CUTOFF_X = f;
MySensorEventListener.kFilteringFactor = 1.0F / (float)k1;
MySensorEventListener.accelFactor = f4;
MySensorEventListener.diffFactor = f5;
ControlComponent.inAirMovementFactor = 1.0F - f1;
ControlComponent.inAirMemoryMovementFactor = f2;
DropManager.speed = f3;
}
flag4 = sharedpreferences.getBoolean("canUseDrawTexture", true);
flag5 = sharedpreferences.getBoolean("canUseVBO", true);
GLSprite.shouldUseDrawTexture = flag4;
spriteRenderer.setVertMode(flag5);
ProfileRecorder.sSingleton.resetAll();
_StatusManager.setBall(_DropManager.getBall());
_DropManager.getCollisionComponent().setStatusManager(_StatusManager);
_ControlComponent = _DropManager.getControlComponent();
spriteRenderer.endInit();
simulationRuntime = new MainLoop();
if(!flag1)
simulationRuntime.addGameObject(_DeathDetector);
simulationRuntime.addGameObject(_DropManager);
simulationRuntime.addGameObject(_StatusManager);
simulationRuntime.addGameObject(_GameOverLayer);
setContentView(0x7f030001);
flag6 = sharedpreferences.getBoolean("glSafeMode", false);
mGLSurfaceView = (GLSurfaceView)findViewById(0x7f08001f);
mGLSurfaceView.setRenderer(spriteRenderer);
mGLSurfaceView.setEvent(simulationRuntime);
mGLSurfaceView.setSafeMode(flag6);
runnable1 = new Runnable() {
public void run()
{
android.content.SharedPreferences.Editor editor = getSharedPreferences("DropSettings", 0).edit();
editor.putString("testError", mGLSurfaceView.getLastError());
editor.commit();
Intent intent = new Intent(getApplicationContext(), com/infraredpixel/drop/activities/MainMenuActivity);
intent.putExtra("justCrashed", true);
startActivity(intent);
finish();
}
final OpenGLDropActivity this$0;
{
this$0 = OpenGLDropActivity.this;
super();
}
}
;
mGLSurfaceView.setErrorMethod(runnable1);
sResetFlag = false;
Runtime.getRuntime().gc();
return;
_L2:
if(_ControlMode == 1)
{
ControlComponent.inAirMovementFactor = 0.3F;
ControlComponent.inAirMemoryMovementFactor = 0.08F;
DropManager.speed = 1.0F;
} else
if(_ControlMode == 2)
{
mWakeLock = ((PowerManager)getSystemService("power")).newWakeLock(10, "Drop");
mWakeLock.acquire();
SensorManager sensormanager = (SensorManager)getSystemService("sensor");
List list = sensormanager.getSensorList(1);
int i1 = list.size();
Sensor sensor = null;
if(i1 > 0)
sensor = (Sensor)list.get(0);
int j1 = getDefaultRotation();
MySensorEventListener mysensoreventlistener = new MySensorEventListener(_DropManager, _DeathDetector, j1);
_MyMotionListener = mysensoreventlistener;
sensormanager.registerListener(_MyMotionListener, sensor, 1);
MySensorEventListener.SENSOR_CUTOFF_X = 8.3F + 4.5F * (1.0F - sharedpreferences.getFloat("tiltSensitivity", 0.3F));
MySensorEventListener.kFilteringFactor = 1.0F;
ControlComponent.inAirMovementFactor = 1.0F;
ControlComponent.inAirMemoryMovementFactor = 0.0F;
DropManager.speed = 1.0F;
MySensorEventListener.accelFactor = 1.0F;
MySensorEventListener.diffFactor = 2.0F;
}
if(true) goto _L4; else goto _L3
_L3:
}
public boolean onCreateOptionsMenu(Menu menu)
{
if(!TESTING)
{
return super.onCreateOptionsMenu(menu);
} else
{
menu.add(0, 1, 0, "profile");
menu.add(0, 2, 0, "debug/test");
menu.add(0, 3, 0, "main menu");
menu.add(0, 4, 0, "pause/resume");
return true;
}
}
protected void onDestroy()
{
if(mWakeLock != null && mWakeLock.isHeld())
{
mWakeLock.release();
mWakeLock = null;
}
SensorManager sensormanager = (SensorManager)getSystemService("sensor");
if(_MyMotionListener != null)
{
sensormanager.unregisterListener(_MyMotionListener);
_MyMotionListener = null;
}
mGLSurfaceView = null;
_DropManager = null;
_StatusManager = null;
_DeathDetector = null;
_GameOverLayer = null;
simulationRuntime = null;
_ControlComponent = null;
super.onDestroy();
}
public boolean onKeyDown(int i, KeyEvent keyevent)
{
if(_ControlMode == 1)
{
if(i == 82 || i == 21)
{
_ControlComponent.autoBreak = false;
_ControlComponent.moveLeft();
_LeftPressed = true;
return true;
}
if(i == 84 || i == 22)
{
_ControlComponent.autoBreak = false;
_ControlComponent.moveRight();
_RightPressed = true;
return true;
} else
{
return super.onKeyDown(i, keyevent);
}
} else
{
return super.onKeyDown(i, keyevent);
}
}
public boolean onKeyUp(int i, KeyEvent keyevent)
{
if(_ControlMode != 1)
break MISSING_BLOCK_LABEL_102;
if(i != 82 && i != 21) goto _L2; else goto _L1
_L1:
boolean flag;
_LeftPressed = false;
flag = true;
_L5:
if(!_LeftPressed && !_RightPressed)
_ControlComponent.stopMovement();
if(!_DeathDetector.getDeathOccured())
_DropManager.start();
if(flag)
return true;
else
return super.onKeyUp(i, keyevent);
_L2:
if(i == 84) goto _L4; else goto _L3
_L3:
flag = false;
if(i != 22) goto _L5; else goto _L4
_L4:
_RightPressed = false;
flag = true;
goto _L5
return super.onKeyUp(i, keyevent);
}
public boolean onOptionsItemSelected(MenuItem menuitem)
{
switch(menuitem.getItemId())
{
default:
return false;
case 1: // '\001'
finish();
startActivity(new Intent(mGLSurfaceView.getContext(), com/infraredpixel/drop/activities/ProfilingActivity));
return true;
case 2: // '\002'
finish();
startActivity(new Intent(mGLSurfaceView.getContext(), com/infraredpixel/drop/activities/DebugActivity));
return true;
case 3: // '\003'
finish();
startActivity(new Intent(mGLSurfaceView.getContext(), com/infraredpixel/drop/activities/MainMenuActivity));
return true;
case 4: // '\004'
break;
}
if(simulationRuntime.isPaused())
{
simulationRuntime.unPause();
mGLSurfaceView.onResume();
} else
{
simulationRuntime.pause();
mGLSurfaceView.onPause();
}
return true;
}
protected void onPause()
{
mGLSurfaceView.onPause();
if(mWakeLock != null && mWakeLock.isHeld())
mWakeLock.release();
if(_ControlMode == 2)
{
SensorManager sensormanager = (SensorManager)getSystemService("sensor");
if(_MyMotionListener != null)
sensormanager.unregisterListener(_MyMotionListener);
}
super.onPause();
}
protected void onResume()
{
mGLSurfaceView.onResume();
if(sResetFlag)
{
handleScore();
_DropManager.reset();
sResetFlag = false;
}
if(mWakeLock != null && !mWakeLock.isHeld())
mWakeLock.acquire();
if(_ControlMode == 2)
{
SensorManager sensormanager = (SensorManager)getSystemService("sensor");
List list = sensormanager.getSensorList(1);
int i = list.size();
Sensor sensor = null;
if(i > 0)
sensor = (Sensor)list.get(0);
sensormanager.registerListener(_MyMotionListener, sensor, 1);
}
super.onResume();
}
protected void onStart()
{
super.onStart();
}
public boolean onTouchEvent(MotionEvent motionevent)
{
if(!_GameOverLayer.isEnabled()) goto _L2; else goto _L1
_L1:
boolean flag;
int k = motionevent.getAction();
flag = false;
if(k == 0)
{
_GameOverLayer.doNextStep();
flag = true;
}
_L4:
int i;
ControlComponent controlcomponent;
int j;
float f;
try
{
Thread.sleep(20L);
}
catch(InterruptedException interruptedexception)
{
interruptedexception.printStackTrace();
return flag;
}
return flag;
_L2:
i = _ControlMode;
flag = false;
if(i == 0)
{
controlcomponent = _ControlComponent;
flag = false;
if(controlcomponent != null)
{
j = motionevent.getAction();
f = motionevent.getX();
if(j == 2)
{
if((float)(widthPixels / 2) < f)
_ControlComponent.moveRight();
else
_ControlComponent.moveLeft();
flag = true;
} else
if(j == 0)
{
if((float)(widthPixels / 2) < f)
_ControlComponent.moveRight();
else
_ControlComponent.moveLeft();
if(!_DeathDetector.getDeathOccured())
_DropManager.start();
flag = true;
} else
{
flag = false;
if(j == 1)
{
_ControlComponent.stopMovement();
flag = true;
}
}
}
}
if(true) goto _L4; else goto _L3
_L3:
}
public boolean onTrackballEvent(MotionEvent motionevent)
{
if(_ControlMode == 1)
{
if(!_DeathDetector.getDeathOccured())
_DropManager.start();
float f = motionevent.getX();
_ControlComponent.autoBreak = true;
_ControlComponent.moveSideways(3.5F * f);
return true;
} else
{
return super.onTrackballEvent(motionevent);
}
}
public static final int CONTROL_MODE_KEYS = 1;
public static final int CONTROL_MODE_TILT = 2;
public static final int CONTROL_MODE_TOUCH = 0;
public static final String PREFS_NAME = "DropSettings";
private static boolean TESTING = false;
protected static boolean sResetFlag;
private ControlComponent _ControlComponent;
private int _ControlMode;
DeathDetector _DeathDetector;
DropManager _DropManager;
private GameOverLayer _GameOverLayer;
private boolean _LeftPressed;
MySensorEventListener _MyMotionListener;
private boolean _RightPressed;
StatusManager _StatusManager;
private GLSurfaceView mGLSurfaceView;
protected android.os.PowerManager.WakeLock mWakeLock;
MainLoop simulationRuntime;
private GLRenderer spriteRenderer;
private int widthPixels;
}
该程序给出了很多错误..
答案 0 :(得分：2)
你在这里所拥有的不是真正的Java，你不应该以它为例来学习Java编程。
那么实际上这是什么东西？
在我看来，有人试图反编译Android应用程序，反编译器无法将部分代码转换回真正的Java。相反，反编译器插入了goto“语句”，试图将代码的含义传达给（人类）读者。
答案 1 :(得分：2)
这显然是反编译的输出。虽然这是获得对程序的具体见解的好方法，但它不像@Jägermeister所说的那样是初学者级材料，因为jads缺乏标准Java源代码的清晰度和简洁性。
例如，goto keyword is not supported on the source code side of the JDK，但它以跳转指令的形式在字节代码中使用。中断，继续，循环，ifs等可以以surjective方式转换为跳跃。反编译器无法恢复原始构造，并且只是将gotos和标签放入jad中。程序员需要恢复合理的，可编译的流程结构。
也就是说，对你的问题的全面回答是：它是java，而是字节代码的图像，而不是源代码的严格恢复，并且需要手动修改才能再次编译。 / p>