OP270/src/com/mes/component/MyDialog.java

package com.mes.component;

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

public class MyDialog extends JDialog {

    public MyDialog(Frame owner, String title, String msg){
        super(owner, title);
        init(msg);
    }

    private void init(String msg){
        Container container = this.getContentPane();
        container.setLayout(null);
        container.setBackground(Color.BLACK);
        this.setSize(800,220);
        this.setLocationRelativeTo(null);

        JLabel tslabel = new JLabel(msg);
        tslabel.setHorizontalAlignment(SwingConstants.CENTER);
        tslabel.setForeground(Color.RED);
        tslabel.setFont(new Font("微软雅黑", Font.PLAIN,48));
        tslabel.setBounds(0,30,800,100);

        container.add(tslabel);
        this.setModal(true);
        this.setVisible(true);
    }
}