日食中的JOptionPane非常小

Question

我正在使用Eclipse Photon 2018并使用Java制作一个简单的项目。我开始使用JOptionPane，由于某种原因 - 尺寸很小，如下图所示：

我的代码：

main.Java:

public class Main {

    public static void main(String[] args) {
        Messageable ui = new GrapghicalUI();
        String res = ui.getString("what is your name? ");
        ui.showMessage("hi" +res);
    }

}

consul E UI.Java:

import java.util.Scanner;

public class ConsoleUI implements Messageable{
    private Scanner s = new Scanner(System.in);

    @Override
    public void showMessage(String str) {
        System.out.println(str);
    }

    @Override
    public String getString(String msg) {
        System.out.println(msg);
        return s.next();
    }

}

graphical UI.Java:

import javax.swing.JOptionPane;

public class GrapghicalUI implements Messageable {

    @Override
    public void showMessage(String str) {
        JOptionPane.showMessageDialog(null, str);
    }

    @Override
    public String getString(String msg) {
        return JOptionPane.showInputDialog(msg);
    }

}

Messageable：

public interface Messageable {
    void showMessage(String str);
    String getString(String msg);
}