writestring.java

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import java.io.*;
import java.net.*;
import java.awt.*;
import java.awt.event.*;
public class WriteString extends Frame implements ActionListener
{
TextField tf;
Button btn1,btn2;
String filename;
DataOutputStream dos;
public static void main(String args[])
{
if(args.length<1)
{
System.out.println("请在命令行输入要创建的文件名");
System.exit(0);
}
new WriteString(args[0]);
}
WriteString(String f)
{
super("文件");
filename = f;
tf= new TextField(20);
btn1 = new Button("保存");
btn2 = new Button("退出");
tf.addActionListener(this);
btn1.addActionListener(this);
btn2.addActionListener(this);
add("North",btn2);
add("Center",tf);
add("South",btn1 );
try
{
dos = new DataOutputStream (new FileOutputStream(filename));
}
catch(IOException ioe)
{
System.err.println(ioe.toString());
}
pack();
show();
}
public void actionPerformed(ActionEvent e )
{
if(e.getSource()==btn2)
{
try{
dos.close();
dispose();
System.exit(0);
}catch(IOException ioe)
{
System.err.println(ioe.toString());
}
}
else if(e.getSource()==btn1 || e.getSource()==tf)
try
{
dos.writeUTF(tf.getText());
tf.setText("");
}
catch(IOException ioe)
{
System.err.println(ioe.toString());
}
}
}