如何在 Java 中为组件添加工具提示?
java 8object oriented programmingprogramming更新于 2025/8/19 19:24:17
首先我们创建一个组件 −
JLabel label1;
label1 = new JLabel("Id", SwingConstants.CENTER);
现在，为上述组件设置工具提示 −
label1.setToolTipText("Enter Id");
示例
以下是在 Java 中为组件添加工具提示的示例 −
package my;
import java.awt.GraphicsEnvironment;
import java.awt.GridLayout;
import java.awt.Point;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
public class SwingDemo {
public static void main(String[] args) throws Exception {
JFrame.setDefaultLookAndFeelDecorated(true);
JFrame frame = new JFrame("Register!");
JLabel label1, label2, label3;
frame.setLayout(new GridLayout(2, 2));
label1 = new JLabel("Id", SwingConstants.CENTER);
label1.setToolTipText("Enter Id");
label2 = new JLabel("Age", SwingConstants.CENTER);
label2.setToolTipText("Enter Age");
label3 = new JLabel("Password", SwingConstants.CENTER);
label3.setToolTipText("Enter Password");
JTextField emailId = new JTextField(20);
JTextField age = new JTextField(20);
JPasswordField passwd = new JPasswordField();
passwd.setEchoChar('*');
frame.add(label1);
frame.add(label2);
frame.add(label3);
frame.add(emailId);
frame.add(age);
frame.add(passwd);
Point center = GraphicsEnvironment.getLocalGraphicsEnvironment().getCenterPoint();
int width = 500;
int height = 200;
frame.setBounds(center.x - width / 2, center.y - height / 2, width, height);
frame.setVisible(true);
}
}
输出
输出如下。保持鼠标光标不动时，工具提示文本可见。 −
