急！！！关于改变JTable显示的问题，好久没搞出来，达人帮我看下

[CTea321]

代码在附件里，里面有三个java文件，主文件是MainFrame.java；还有两个txt文件是用来测试的

问题是第一次执行“Open”,打开1.txt里的把其中的内容（一个50*50矩阵）显示在表格中，若再执行一次 “Open”操作，打开2.txt（100*100矩阵），其中的内容也可以显示，但是一拖动滚动条，又显示成第一次的内容。

有兴趣的达人帮我测试修改一下
我搞了好长时间没搞出来
谢谢了啊

为什么上传附件总是出错呀
要不有兴趣的达人把邮箱留下我发邮件，真的很急。

[horizonlyhw]

ResultDisplayTable rdt=new ResultDisplayTable(this,rowNum,cellData);
你做一次openfile動作 上面代碼就執行一次 就會new一個新的Jtable 兩次就new了兩個jtable
你試試改成只有一個jtable 根據數據不同 只改變tablemodel就行了～

[CTea321]

仍然没有解决
我快要疯了，没有思路ing

[horizonlyhw]

把你代码 给我发一份吧 我试试 [e-mail]

[CTea321]

用校园网打开好慢

我之前也想过这么做，只是因为我初学，不知道具体该怎么做
horizonlyhw 能教一下我么？

[horizonlyhw]

我也只是過過嘴癮 呵呵 只能給點建議（俺也初學這個） 你試試 還不一定行～
把table的定義放在ResultDisplayTable類外面
或者 把ResultDisplayTable類 寫成 單例類～ 構造函數private 只有一個實例化對象

[CTea321]

OK,我试试

[CTea321]

我把代码贴出来

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.filechooser.FileFilter;
import java.io.IOException;
import java.io.File;

public class MainFrame extends JFrame
{
	
	public static void main(String args[])
	{
		MainFrame mainFrame = new MainFrame();
		mainFrame.setVisible(true);
		mainFrame.setResizable(true);
		mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
	
	
	public MainFrame()
	{
		Toolkit kit = Toolkit.getDefaultToolkit();
		Dimension screenSize=kit.getScreenSize();
		
		setTitle("Log Parse Tool");
		setBounds(0,0,screenSize.width,24*screenSize.height/25);
		
		JMenu fileMenu=new JMenu("File");
		JMenuItem openItem=new JMenuItem("Open");
		openItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,InputEvent.CTRL_MASK));
		openItem.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
				openFile(e);
			}
		});
		
		JMenuItem saveAsItem=new JMenuItem("Save");
		saveAsItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_S,InputEvent.CTRL_MASK));
		saveAsItem.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
//				saveFile(e);
			}
		});
		
		JMenuItem exitItem=new JMenuItem("Exit");
		exitItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_F4,InputEvent.ALT_MASK));
		exitItem.addActionListener(new ActionListener()
		{
			public void actionPerformed(ActionEvent e)
			{
				exitFrame(e);
			}
		});
		
		fileMenu.addSeparator();
		fileMenu.add(openItem);
		fileMenu.addSeparator();
		fileMenu.addSeparator();
		fileMenu.add(saveAsItem);
		fileMenu.addSeparator();
		fileMenu.addSeparator();
		fileMenu.add(exitItem);
		fileMenu.addSeparator();
		
		
		JMenuBar menuBar=new JMenuBar();
		setJMenuBar(menuBar);
		menuBar.add(fileMenu);
	}

	void openFile(ActionEvent e)
	{
		JFileChooser chooser = new JFileChooser(".");
		FileFilter type = new ExtensionFilter("Text File", new String[] { ".txt", ".doc" });
		chooser.addChoosableFileFilter(type);
		chooser.setAcceptAllFileFilterUsed(true);
		chooser.setFileFilter(type);
		
		int status = chooser.showOpenDialog(MainFrame.this);
		File f_1;
		String fileName="";
		
		if (status == JFileChooser.APPROVE_OPTION)
		{
			f_1 = chooser.getSelectedFile();
			fileName=f_1.getAbsolutePath();
		}
		try
		{
			ProcessFile pf=new ProcessFile(fileName);
			int rowNum=pf.getRowNum();
			int[][] cellData = new int[rowNum][rowNum+1];
			System.arraycopy(pf.getCellData(),0, cellData,0,pf.getCellData().length);
			ResultDisplayTable rdt=new ResultDisplayTable(this,rowNum,cellData);
			
		}catch(IOException ee) {
                  ee.printStackTrace();
		}
	}
	
	
	void exitFrame(ActionEvent e)
	{
		System.exit(0);
	}
	
	public class ExtensionFilter extends FileFilter
	{
		private String extensions[];
		private String description;
		public ExtensionFilter(String description, String extension)
		{
			this(description, new String[] { extension });
		}
		public ExtensionFilter(String description, String extensions[])
		{
			this.description = description;
			this.extensions = (String[]) extensions.clone();
		}
		public boolean accept(File file)
		{
			if (file.isDirectory())
			{
				return true;
			}
			int count = extensions.length;
			String path = file.getAbsolutePath();
			for (int k = 0; k < count; k++)
			{
				String ext = extensions[k];
				
				if (path.endsWith(ext) && (path.charAt(path.length() - ext.length()) == '.'))
				{
					return true;
				}
			}
			return false;
		}
		public String getDescription()
		{
			return (description == null ? extensions[0] : description);
		}
	}
}

[CTea321]

import java.io.*;
import java.util.*;

public class ProcessFile
{
	private String fileName;
	public int count;
	public int[][] cellData;
	
	public ProcessFile(String fileName) throws IOException
	{
		this.fileName=fileName;
		this.process();
	}
	
	public void process() throws IOException
	{
		try
		{
			File f=new File(this.fileName);
			FileReader fr=new FileReader(f);
			long fileLength=f.length();
			LineNumberReader lnr=new LineNumberReader(fr);
			
			if(lnr != null)
			{
				lnr.skip(fileLength);
			}
			count=lnr.getLineNumber()+1;
			
			String line;
			int p=0;
			int k;
			cellData = new int[count][count+1];
			
			FileReader fr_1=new FileReader(f);
			BufferedReader br = new BufferedReader(fr_1);
			
			while((line = br.readLine())!=null && p<count)
			{
				String[] str = line.split(" ");
				for(k=1;k<=str.length;k++)
				{
					cellData[p][k]=Integer.parseInt(str[k-1]);
				}
				p++;
			}
			br.close();
		}catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	public int getRowNum()
	{
		return count;
	}

	public int[][] getCellData()
	{
		return cellData;
	}
}

[CTea321]

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.*;

import javax.swing.*;
import javax.swing.JTable;
import javax.swing.JViewport;
import javax.swing.ListSelectionModel;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.TableModel;
import javax.swing.table.*;

public class ResultDisplayTable
{
	protected MainFrame mainFrame;
	private int rowNum;
	private int i,j;
	private int colNum=0;
	private int[][] cellData;
	private String[] columnNames;
	
	public ResultDisplayTable(MainFrame mainFrame,int rowNum,int[][] cellData)
	{
		this.mainFrame=mainFrame;
		this.rowNum=rowNum;
//		this.colNum=this.rowNum+1;
		this.colNum = cellData[0].length;
		this.cellData = new int[this.rowNum][this.colNum];
		this.columnNames = new String[this.colNum];
		this.cellData = cellData;
		this.Table();
	}
	
	JTable mainTable;
	JTable fixedTable;
	JScrollPane scrollPane;
	private void Table()
	{
		for(i=0;i<this.rowNum;i++)
		{
			this.cellData[i][0]=i+1;
		}
		
		this.columnNames[0]="#";
		for (j = 1; j < this.columnNames.length; j++)
		{
			this.columnNames[j] = String.valueOf(j);
		}
		
		TableModel fixedColumnModel = new DefaultTableModel()
		{
			public int getColumnCount()
			{
				return 1;
			}
			
			public String getColumnName(int column)
			{
				return columnNames[column];
			}
			
			public int getRowCount()
			{
				return cellData.length;
			}
			
			public Object getValueAt(int row, int column)
			{
				return cellData[row][column];
			}
		};
		
		TableModel mainModel = new DefaultTableModel()
		{
			public int getColumnCount()
			{
				return columnNames.length - 1;
			}
			
			public String getColumnName(int column)
			{
				return columnNames[column + 1];
			}
			
			public int getRowCount()
			{
				return cellData.length;
			}
			
			public Object getValueAt(int row, int column)
			{
				return cellData[row][column + 1];
			}
		};

		fixedTable = new JTable(fixedColumnModel);
		fixedTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
		fixedTable.setRowHeight(30);
		fixedTable.getColumnModel().getColumn(0).setPreferredWidth(30);
		
		DefaultTableCellRenderer   dtc=new   DefaultTableCellRenderer();
		dtc.setBackground(new Color(207,245,254));
		fixedTable.getColumnModel().getColumn(0).setCellRenderer(dtc);
		
		mainTable = new JTable(mainModel);
		mainTable.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
		ListSelectionModel model = fixedTable.getSelectionModel();
		mainTable.setSelectionModel(model);
		mainTable.getTableHeader().setPreferredSize(new   Dimension(40, 30));
		mainTable.getTableHeader().setFont(new   Font("Arial",Font.PLAIN,12));
		mainTable.getTableHeader().setBackground(new Color(207,245,254));

		mainTable.setRowHeight(30);
		for(j = 0; j < this.columnNames.length-1; j++)
		{
			mainTable.getColumnModel().getColumn(j).setPreferredWidth(40);
		}
		
//		for(i=0;i<this.rowNum;i++)
//		{
//			fixedTable. getCellEditor(i,0).getTableCellEditorComponent(fixedTable,i+1,false,i,0).setFont(new Font("Arial",Font.PLAIN,12));
//		}
		
		scrollPane = new JScrollPane(mainTable);
		Dimension fixedSize = fixedTable.getPreferredSize();
		mainTable.repaint();
		mainTable.updateUI();
		
		JViewport viewport = new JViewport();
		viewport.setView(fixedTable);
		viewport.setPreferredSize(fixedSize);
		scrollPane.setCorner(JScrollPane.UPPER_LEFT_CORNER, fixedTable.getTableHeader());
		scrollPane.setRowHeaderView(viewport);
		scrollPane.revalidate();
		
		mainFrame.add(scrollPane);
		mainFrame.validate();
	}

}

[cowputer]

能把1.txt和2.txt的内容贴出来不？

[cowputer]

解决了，首先建议MainFrame类的main中在mainFrame.setVisible(true);之前，加上mainFrame.pack();
然后，ResultDisplayTable类的最后部分
scrollPane.revalidate();

mainFrame.validate();
这两句之间的内容修改成：
scrollPane.revalidate();

mainFrame.getContentPane().removeAll();
mainFrame.getContentPane().add(scrollPane);

mainFrame.validate();
就正常了