import java.awt.*;
import java.awt.event.*;public class Test_11_2
{
public static void main(String args[])
{
TextField_Label tfl = new TextField_Label("Text_Label");
}
}
class TextField_Label extends Frame
{
private TextField tx;
private Label l_tx,l_la,la;
TextField_Label(String s)
{
super(s);
setBounds(300,300,300,250);
setBackground(Color.white);
setLayout(new FlowLayout(FlowLayout.LEFT,5,5));
tx = new TextField(20);
l_tx = new Label("文本框: ");
l_la = new Label("标签 : ");
la = new Label();
la.setBackground(Color.red);
tx.addKeyListener(new KeyAdapter()
{
public void keyTyped(KeyEvent e)
{
if(e.getKeyChar()==10)
{
la.setText(tx.getText());
}
}
});
add(l_tx);
add(tx);
add(l_la);
add(la);
setVisible(true);
}
}
import java.awt.event.*;public class Test_11_2
{
public static void main(String args[])
{
TextField_Label tfl = new TextField_Label("Text_Label");
}
}
class TextField_Label extends Frame
{
private TextField tx;
private Label l_tx,l_la,la;
TextField_Label(String s)
{
super(s);
setBounds(300,300,300,250);
setBackground(Color.white);
setLayout(new FlowLayout(FlowLayout.LEFT,5,5));
tx = new TextField(20);
l_tx = new Label("文本框: ");
l_la = new Label("标签 : ");
la = new Label();
la.setBackground(Color.red);
tx.addKeyListener(new KeyAdapter()
{
public void keyTyped(KeyEvent e)
{
if(e.getKeyChar()==10)
{
la.setText(tx.getText());
}
}
});
add(l_tx);
add(tx);
add(l_la);
add(la);
setVisible(true);
}
}
你可以把这个写成这个样子
la = new Label(" ");
这样就可以了