那位高手能告诉我,我的 Frame 为什么非要在边框上鼠标拉动一下才能看到TextField
和 Button啊?import java.awt.*;
import java.awt.event.*;
public class TestFrame extends Frame
{
TextField txt;
Button but;
public static void main(String[] args)
{
TestFrame TF = new TestFrame();
}
TestFrame()
{
super("我的Frame");
setLayout(new FlowLayout());
setSize(300,400);
setVisible(true);
txt = new TextField(20);
add(txt);
but = new Button("好好学习");
add(but);
addWindowListener(new cls());
}
class cls extends WindowAdapter
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
}
}
和 Button啊?import java.awt.*;
import java.awt.event.*;
public class TestFrame extends Frame
{
TextField txt;
Button but;
public static void main(String[] args)
{
TestFrame TF = new TestFrame();
}
TestFrame()
{
super("我的Frame");
setLayout(new FlowLayout());
setSize(300,400);
setVisible(true);
txt = new TextField(20);
add(txt);
but = new Button("好好学习");
add(but);
addWindowListener(new cls());
}
class cls extends WindowAdapter
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
}
}
import java.awt.event.*;
public class TestFrame extends Frame {
TextField txt;
Button but;
public static void main(String[] args) {
TestFrame TF = new TestFrame();
}
TestFrame() {
super( "我的Frame ");
setLayout(new FlowLayout());
setSize(300,400);
txt = new TextField(20);
add(txt);
but = new Button( "好好学习 ");
add(but);
addWindowListener(new cls());
setVisible(true);//组件填加最后才可以设置可见.
}
class cls extends WindowAdapter {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
}
}
frame.pack();//调整窗口大小从而适应组件。
frame.setVisible(true);//显示组件。