Question

我到处都搜索过，而且有大量的文档，但是这些都令人困惑，而且有一半的测试代码无法正常工作，所以我在问。制作jlabel的最简单方法是什么，设置其位置（使用整数或维度），并将其添加到JFrame

package com.notelek.notify;

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class Gui {



    public static void main(String[] args){

    }

    public static void notify(String line1, String line2, String imagepath, int style){
        GraphicsDevice gd = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
        int width = gd.getDisplayMode().getWidth();
        int swidth = width - 320;

        JFrame notification = new JFrame();
        notification.setSize(new Dimension(320,64));
        notification.setLocation(swidth, 0);
        notification.setUndecorated(true);
        notification.setVisible(true);

        JPanel main = new JPanel();

        JLabel notifyline1 = new JLabel();
        notifyline1.setText("test");
        notifyline1.setLocation(0, 0);
        main.add(notification);
    }

}

Answer 1

您需要将JLabel添加到可见容器中，否则它无法显示在屏幕上。

我还猜你确实打算将JPanel添加到JFrame而不是反之亦然 - 就像这样：

...
main.add(notifyline1);
...    
notification.add(main);
...

Answer 2

我认为你的意思是notification.add(main);，订单很重要：

import java.awt.*;
import javax.swing.*;

public class Gui {

    public static void main(String[] args){
        notify("", "", "", 0);
    }

    public static void notify(String line1, String line2, String imagepath, int style){
        JFrame notification = new JFrame();
        JPanel main = new JPanel();
        JLabel notifyline1 = new JLabel();
        notifyline1.setText("test");
        main.add(notifyline1);
        notification.add(main);
        notification.setSize(new Dimension(320,64));
        notification.setLocationRelativeTo(null);
        notification.setUndecorated(true);
        notification.setVisible(true);
    }
}

将两个简单的JLabel添加到jframe

2 个答案: