Question

java如何实现鼠标移到文本框上弹出一个消息框

Answer 1

import java.awt.BorderLayout;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JFrame;
import javax.swing.JTextArea;

public class AlertFrame extends JFrame{

public AlertFrame(){
setTitle("弹框");
setBounds(200,200,400,250);
JTextArea text=new JTextArea("这里是文本域",5,5);
text.addMouseListener(new MouseListener() {

@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub

}

@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub

}

@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub

}

@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
JFrame jf=new JFrame();
jf.setTitle("消息框");
jf.setBounds(300, 350, 150, 100);
jf.setVisible(true);
jf.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
}

@Override
public void mouseClicked(MouseEvent e) {
// TODO Auto-generated method stub

}
});
add(text,BorderLayout.NORTH);
setVisible(true);
setDefaultCloseOperation(EXIT_ON_CLOSE);
}
public static void main(String[] args){
new AlertFrame();
}
}

Answer 2

给文本框加鼠标监听事件 ，当鼠标移动上去就弹出，消息框，就行了

Answer 3

鼠标里面有个悬停事件，，通过js控制悬停时需要的动作就行了

Answer 4

表单 <input type="text"onmouseover="showNone()"/>

js:
<script language="javascript">
function showNone()
{
alert("这是弹的一个框")
}

</script>

Answer 5

设置setTipText就有了