请大家指点,万分感激!
import java.awt.*;
import java.awt.event.*;
class Text3 implements ActionListener
{
public void main(String[] args)
{
Frame f=new Frame( "my java ");
f.setSize(600,400);
f.setLocation(100,100);
f.setLayout(new FlowLayout());
TextField text1=new TextField(10);
TextField text2=new TextField(10);
text1.setEchoChar( '* ');
f.add(text1);
f.add(text2);
text1.addActionListener(this);
f.show();
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==text1)
{
text2.setText(text1.getText());
}
}
}
请大家帮我看下这段代码出错的原因.意为在窗口上放两个文本框,后一个文本框显示前一个文本框的内容.
[解决办法]
每看出错误
[解决办法]
JFrame是不能添加东西进去的
你这样改把
import java.awt.*;
import java.awt.event.*;
class Text3 implements ActionListener
{
public void main(String[] args)
{
JFrame f=new JFrame( "my java ");
f.setSize(600,400);
f.setLocation(100,100);
f.setLayout(new FlowLayout());
TextField text1=new TextField(10);
TextField text2=new TextField(10);
text1.setEchoChar( '* ');
JPanel panel = new JPanel();
panel.setLayout(new GridLayout(2,1));
panel.add(text1);
panel.add(text2);
f.getContentPane().add(panel);
text1.addActionListener(this);
f.show();
}
public void actionPerformed(ActionEvent e)
{
if(e.getSource()==text1)
{
text2.setText(text1.getText());
}
}
} 这样就可以了
