package thegreatestrpgevermade;
import java.util.HashMap;
import java.lang.reflect.*;
import javax.swing.JPanel;
import javax.swing.JFrame;
import javax.swing.JTextField;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.io.Externalizable;
import javax.swing.Action;
import javax.swing.AbstractAction;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.io.ObjectInputStream;
import java.io.FileOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
public class Room implements Externalizable
{
static Room room;
HashMap<Integer,ParentObject> ParentObjectMap ;
int roomNumber ;
int width ;
int height ;
int idNumber ;
static ActionClass actionClass;
static JFrame creationWindow;
static JPanel creationPanel;
static JButton addObjectButton;
static JButton removeObjectButton;
static JButton finalizeRoomButton;
static JTextField classNameField;
static JTextField xSpawnField;
static JTextField ySpawnField;
static JTextField argument3Field;
static JTextField numberOfArgumentsField;
static JTextField roomNumberField;
static JTextField roomWidthField;
static JTextField roomHeightField;
public Room()
{
HashMap<Integer,ParentObject> ParentObjectMap = new HashMap();;
int roomNumber=0 ;
int width =0 ;
int height =0;
int idNumber =0;
}
static Object StringToObj (String name, Object[] argArray, int numArgs)
{
try
{
Class o = Class.forName(name);
Class argTypes[] = new Class[numArgs];
//System.out.println("A");
for(int I = 0; I<numArgs ; I ++)
{
argTypes[I] = Class.forName(argArray[I].getClass().getName());//.Type;
if (Class.forName(argArray[I].getClass().getName()) == Integer.class)
{
argTypes[I] = Integer.TYPE;
}
//System.out.println(argArray[I].getClass().getName());
//argTypes[1] = Integer.TYPE;
}
Constructor constructor = o.getConstructor(argTypes);
//Object arguments[] = new Object[numArgs];
//System.out.println("C");
//arguments[0] = A;
//arguments[1] = B;
Object newObject = constructor.newInstance(argArray);
//System.out.println("D");
return newObject;
}
catch(ClassNotFoundException cnfe)
{
System.out.println("Class not found exception ");
System.exit(1);
}
catch(NoSuchMethodException nsme)
{
System.out.println("No Such Method Exception");
System.exit(1);
}
catch(InstantiationException instExcep)
{
System.out.println("Instantiation Exception");
System.exit(1);
}
catch(IllegalAccessException iae)
{
System.out.println("Illegal Access Exception");
System.exit(1);
}
catch(InvocationTargetException ite)
{
System.out.println("Invocation target exception");
System.exit(1);
}
//so , sort through an array of all the sub classes of parent object,
//or maybe all the classes in the package, and test their getName
//against the argument until it comes out right, then return that class.
System.out.println("String to Obj is broken");
return null;
}
class ActionClass implements ActionListener
{
public void actionPerformed (ActionEvent e)
{
if(e.getSource() == addObjectButton)
{
Object[] arguments = new Object[Integer.parseInt(numberOfArgumentsField.getText())];
arguments[0] = Integer.parseInt(xSpawnField.getText());
arguments[1] = Integer.parseInt(ySpawnField.getText());
//arguments[2] = idNumber;
ParentObject placeHolder = (ParentObject)StringToObj("thegreatestrpgevermade." +
classNameField.getText(), arguments,Integer.parseInt(numberOfArgumentsField.getText()));
placeHolder.IDNUMBER = idNumber;
idNumber ++;
ParentObjectMap.put(new Integer(idNumber),placeHolder);
System.out.println("idnumber :" +placeHolder.IDNUMBER);
}
if(e.getSource() == removeObjectButton)
{
System.out.println(ParentObjectMap.get(0).spriteDirectory);
System.out.println("removeObjectButton Pressed");
}
if(e.getSource() == finalizeRoomButton)
{
try
{
roomNumber = Integer.parseInt(roomNumberField.getText());
width = Integer.parseInt(roomWidthField.getText());
height = Integer.parseInt(roomHeightField.getText());
FileOutputStream fos = new FileOutputStream("C:\\thegreatestrpgevermade\\room"
+ roomNumber +".ser");
ObjectOutputStream oos = new ObjectOutputStream(fos);
System.out.println("Finalize: room line 152");
oos.writeObject(room);
System.out.println("Finalize: room line 154");
oos.flush();
oos.close();
}
catch(IOException ioe)
{
System.out.println("io exception room");
System.exit(1);
}
}
}
}
public void InitializeCreationMode()
{
room = new Room();
ParentObjectMap = new HashMap();
actionClass = new ActionClass();
creationWindow = new JFrame();
creationPanel = new JPanel();
addObjectButton = new JButton("Add Object");
removeObjectButton = new JButton("Remove Object");
finalizeRoomButton = new JButton("Finalize Room");
classNameField = new JTextField("Class Name",20);
xSpawnField = new JTextField("X Coordinate(arg1)" , 20);
ySpawnField = new JTextField("Y Coordinate(arg2)" , 20);
argument3Field = new JTextField("Argument 3" , 20);
numberOfArgumentsField = new JTextField("Number Of Arguments" , 20);
roomNumberField = new JTextField("Room Number" , 20);
roomWidthField = new JTextField("Room Width" , 20);
roomHeightField = new JTextField("Room Height" , 20);
creationWindow.setSize(300,400);
creationWindow.setResizable(false);
creationWindow.setLocation(0,0);
creationWindow.add(creationPanel);
creationWindow.setDefaultCloseOperation(creationWindow.EXIT_ON_CLOSE);
creationPanel.setSize(300,400);
creationPanel.add(addObjectButton);
creationPanel.add(removeObjectButton);
creationPanel.add(finalizeRoomButton);
creationPanel.add(roomNumberField);
creationPanel.add(roomWidthField);
creationPanel.add(roomHeightField);
creationPanel.add(classNameField);
creationPanel.add(numberOfArgumentsField);
creationPanel.add(xSpawnField);
creationPanel.add(ySpawnField);
creationPanel.add(argument3Field);
addObjectButton.addActionListener(actionClass);
removeObjectButton.addActionListener(actionClass);
finalizeRoomButton.addActionListener(actionClass);
creationWindow.setVisible(true);
//im thinking ID numbers can't stay random.
//so basically, say HERO hits ENEMY. if ENEMY gets hit, it gives
//HERO its ID number which can be put into the hashmap to modify
// ENEMY'S health.
}
public void readExternal(ObjectInput in)
{
try
{
idNumber = in.readInt();
width = in.readInt();
height = in.readInt();
roomNumber = in.readInt();
// ParentObjectMap = (HashMap)in.readObject();
}
catch(IOException ioe)
{
System.out.println(ioe.toString());
ioe.printStackTrace();
}
catch(ClassNotFoundException cnfe)
{
System.out.println("cnfe exception readExternal");
}
}
public void writeExternal(ObjectOutput out)
{
try
{
System.out.println("Checkpoint 1 writeExternal");
out.writeInt(idNumber);
System.out.println("Checkpoint 2 writeExternal: width:" + width);
out.writeObject(width);
System.out.println("Checkpoint 3 writeExternal : width:" + width);
out.writeInt(height);
System.out.println("Checkpoint 4 writeExternal");
out.writeInt(roomNumber);
System.out.println("Checkpoint 5 writeExternal");
//out.writeObject(ParentObjectMap);
}
catch(IOException ioe)
{
System.out.println(ioe.toString());
ioe.printStackTrace();
}
}
/*public static void main(String[] args)
{
room = new Room();
room.InitializeCreationMode();
}*/
}
另一个类是MainClass。我包括相关的片段。
FileInputStream fis = new FileInputStream("C:\\thegreatestrpgevermade\\room0.ser");
ObjectInputStream ois = new ObjectInputStream(fis);
room = (Room)ois.readObject();
// room = new Room();
room.InitializeCreationMode();
System.out.println("Room Width: " +room.width);
堆栈跟踪是这样的：
java.io.EOFException
at java.io.DataInputStream.readInt(DataInputStream.java:392)
at java.io.ObjectInputStream$BlockDataInputStream.readInt(ObjectInputStream.java:2820)
at java.io.ObjectInputStream.readInt(ObjectInputStream.java:971)
at thegreatestrpgevermade.Room.readExternal(Room.java:220)
at java.io.ObjectInputStream.readExternalData(ObjectInputStream.java:1837)
at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1796)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370)
at thegreatestrpgevermade.MainClass.main(MainClass.java:176)
Initialize创建模式方法创建一个带按钮和字段的jwindow 为宽度，高度等分配值。动作类侦听其按钮 并且finalize按钮序列化字段。序列化出了点问题。 在任何点打印出宽度给出零。我不知道为什么。
答案 0 :(得分：1)
假设您的标题中有问题，答案是肯定的，文件写得不正确。但你不需要这一切。将其更改为实施Serializable而不是Externalizable，并删除readExternal()和writeExternal()方法。