Question

我得到构造函数Object（String）未定义 on＆＃34; super（＆＃34; title＆＃34;）＆＃34;。它不仅仅是这段代码，我创建的每一个程序，包含＆＃34; super＆＃34;有错误，这让我相信，问题是一般性的（日食/缺少导入）。谢谢

import java.awt.Color;
import java.awt.FlowLayout;            
import javax.swing.JFrame;               
import javax.swing.JTextField;
import java.awt.Font;            
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JOptionPane;
import javax.swing.JCheckBox;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.JRadioButton;
import javax.swing.event.ListSelectionListener;
import javax.swing.JScrollPane;

public class MouseEventHandling {
   private JPanel mousepanel;
   private JLabel statusbar;           

    public MouseEventHandling() {
        super("title");

        mousepanel = new JPanel();
        mousepanel.setBackground(Color.WHITE);

    }

}

Answer 1

您应该从JFrame

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构造函数Object（String）未定义

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