Java 智力拼图-游戏

    package gyb;
    
    import java.awt.BorderLayout;
    import java.awt.GridLayout;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
    import java.awt.event.MouseAdapter;
    import java.awt.event.MouseEvent;
    // import java.awt.event.MouseMotionListener;
    import java.io.IOException;
    import java.util.ArrayList;
    import java.util.Collections;
    import javax.swing.Icon;
    import javax.swing.ImageIcon;
    import javax.swing.JFrame;
    import javax.swing.JLabel;
    import javax.swing.JMenu;
    import javax.swing.JMenuBa