app17_18.java

java的课后题答案

import java.awt.*;
import java.awt.event.*;
import java.io.*;
public class app17_18 extends Frame implements ActionListener
{
static app17_18 frm=new app17_18();
static FileDialog flg=new FileDialog(frm,"Save",FileDialog.SAVE);
static TextArea txa=new TextArea();
static Button btn=new Button("Save");
public static void main(String args[])
{
	frm.setSize(200,180);
	BorderLayout bord=new BorderLayout();
	frm.setLayout(bord);
	btn.addActionListener(frm);
	frm.add(txa,bord.CENTER);
	frm.add(btn,bord.SOUTH);
	frm.setVisible(true);
	
}
public void actionPerformed(ActionEvent e)
{
	flg.setVisible(true);
	String name=flg.getDirectory()+flg.getFile();
	try{
		FileWriter fw=new FileWriter(name);
		fw.write(txa.getText());
		fw.close();
	}
	catch(IOException ie){}
}
}