GUI未显示

时间:2018-09-29 22:42:06

标签: user-interface jframe

尝试创建GUI,但是每次我运行代码时,都不会发生/显示任何内容。我最小化了一切,以为它背后的一切,但我根本找不到。这是主要的课程:

import javax.swing.JFrame;

public class MainClass{
public static void main(String[] args) {

    Gui frame = new Gui();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(500,500);
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
    }
}

这是我创建JFrame的类:

import javax.swing.JFrame;
import javax.swing.JLabel;
import java.awt.FlowLayout; 

public class Gui extends JFrame{
private JLabel item1;

public Gui() {
    super("Room Builder");
    setLayout(new FlowLayout());

    item1 = new JLabel("This is a nice sentence");
    item1.setToolTipText("This is going to show up on hover");
    add(item1);
}
}

0 个答案:

没有答案