JFileChooser和 JTextArea的问题

Question

请问一下JFileChooser怎么用的 它的文件过滤怎么写
JTextArea 里面的内容怎么得到 然后生成文件

Answer 1

to 搂主：这是我以前写的一个例子程序，你自己看吧！package swingstudy.swing;import javax.swing.JPanel;
import javax.swing.JScrollPane;
import java.awt.TextArea;
import java.awt.BorderLayout;
import java.awt.Dimension;
import javax.swing.JFrame;
import javax.swing.JButton;
import java.awt.FlowLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JFileChooser;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.File; ?
import java.io.*;/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2006</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */
public class fileChooserDemo implements ActionListener {
    JScrollPane panelConten=new JScrollPane();
    TextArea  txtArea=new TextArea();
    JFrame frame=new JFrame();
    JPanel panelButton=new JPanel();
    JButton fileOpen=new JButton("打開");
    JButton fileSave=new JButton("保存");
    FileReader reader;
    FileWriter writer;
    JFileChooser fileChooser;
    public fileChooserDemo() {
        init();
    }
    public void init(){
        frame.setLayout(new BorderLayout());        //============panelConten===========
        {
            panelConten.setPreferredSize(new Dimension(200, 100));
            panelConten.setViewportView(txtArea);
        }
          frame.add(panelConten,BorderLayout.CENTER);
          //============panelButton==========={
          {
              panelButton.setLayout(new FlowLayout(FlowLayout.RIGHT));
              fileOpen.setPreferredSize(new Dimension(80, 25));
              fileOpen.addActionListener(this);
              panelButton.add(fileOpen);
              fileSave.setPreferredSize(new Dimension(80, 25));
              fileSave.addActionListener(this);
              panelButton.add(fileSave);
          }
        frame.add(panelButton,BorderLayout.SOUTH);
        frame.pack();
        frame.setVisible(true);
    }
    public static void main(String[] args){
        new fileChooserDemo();    }    public void actionPerformed(ActionEvent e) {
        if(e.getSource()==fileOpen){
            System.out.println("===================");
            fileChooser=new JFileChooser();
            fileChooser.showOpenDialog(frame);            if(fileChooser.getSelectedFile()!=null){
                File file = fileChooser.getSelectedFile();
                 char[] input=new char[(int)file.length()];                try {
                    reader = new FileReader(file);
                    reader.read(input);
                    StringBuffer conent=new StringBuffer();
                    for(int i=0;i<input.length;i++){
                    conent.append(input[i]);
                    }
                    txtArea.setText(conent.toString());
                } catch (IOException ex) {
                }
            }else{
                System.out.println("Error");
            }
        }    }
}

Answer 2

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Answer 3

我的站也不错哟,有很多值得你看的哟,
来踩一下呀, 
http://bbs.oneedu.cn/bbs