afiledialog.java

java学习材料

//源文件名：aFileDialog.java
//在下载源程序中的文件夹：1001文件对话框\方法3
import java.awt.*;
import java.awt.event.*;
public class aFileDialog
{
    public static void main(String args[])
    {
        frame1 fwin=new frame1("文件对话框示例");
    }
}

class frame1 extends Frame implements ActionListener
{
    FileDialog saveDialog,openDialog;
    Button btn1,btn2;
    frame1(String tit)
    {
        super(tit);
        setLayout(new FlowLayout());
        setSize(300,100);
        setLocation(350,200);
        setVisible(true);  
        btn1=new Button("   打开   ");
        btn2=new Button("  另存为  ");
        add(btn1); 
        add(btn2);
        pack();
        saveDialog=new FileDialog(this,"另存为",FileDialog.SAVE);
        openDialog=new FileDialog(this,"打开",FileDialog.LOAD);
        btn1.addActionListener(this);
        btn2.addActionListener(this);
        addWindowListener
        (
        new WindowAdapter()
        {
            public void windowClosing(WindowEvent e)
            {
                setVisible(false);
                System.exit(0);
            }
        }
        );
    }

    public void actionPerformed(ActionEvent e)
    {
        if(e.getSource()==btn1)
        {
            openDialog.setVisible(true);
        }
        if(e.getSource()==btn2)
        {
            saveDialog.setVisible(true);
        }
    }
}