当鼠标单击JTextField时如何清除JTextField

当鼠标单击JTextField时如何清除JTextField

TL; DR

无论如何，注册

MouseAdapter

和替代

mouseClicked

对我有用，

import java.awt.FlowLayout;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;import javax.swing.Jframe;import javax.swing.JTextField;import javax.swing.SwingUtilities;public class ClickAndClearDemo {    private static void createAndShowGUI(){        Jframe frame = new Jframe();        frame.setDefaultCloseOperation(Jframe.EXIT_ON_CLOSE);        frame.setLayout(new FlowLayout(FlowLayout.CENTER, 20, 20));        final JTextField textField = new JTextField("Enter text here...");        textField.addMouseListener(new MouseAdapter(){ @Override public void mouseClicked(MouseEvent e){     textField.setText(""); }        });        frame.add(textField);        frame.pack();        frame.setVisible(true);    }    public static void main(String[] args) {        SwingUtilities.invokeLater(new Runnable(){ @Override public void run() {     createAndShowGUI(); }        });    }}

我希望这个例子能使您正确地开始！