Java Submarine War game source project

The code is as follows

Package Com.util;import Java.awt.borderlayout;import Java.awt.color;import java.awt.dimension;import Java.awt.graphics;import Java.awt.graphics2d;import Java.awt.gridlayout;import Java.awt.Image;import Java.awt.toolkit;import Java.awt.event.actionevent;import Java.awt.event.actionlistener;import Java.util.observable;import Javax.swing.jlabel;import javax.swing.jpanel;/* * Map Game Main interface panel */public class MainPanel                Extends JPanel {private static final long serialversionuid = 1L;        Private MyButton Startbutton;        Private MyButton Exitbutton;        Private JLabel HelpLabel;        Private JLabel HelpLabel1;        Private JLabel HelpLabel2;        Private JLabel helpLabel3;        private image Image;        Private JLabel Centerlabel;        Private Boolean Isstart;        Private Boolean isexit;        Private Observable Obs;                                Public Mainpanel (Observable ob) {obs = OB; Startbutton = new MyButton ("Enter the game");                Exitbutton = new MyButton ("Exit Game");                HelpLabel = new JLabel ();                HelpLabel1 = new JLabel ();                HelpLabel2 = new JLabel ();                HelpLabel3 = new JLabel ();                            Centerlabel = new JLabel ();                       This.setlayout (New BorderLayout ());            This.helpLabel.setPreferredSize (New Dimension (645,291));            This.helpLabel1.setPreferredSize (New Dimension (180,80));            This.helpLabel2.setPreferredSize (New Dimension (215,80));            This.helpLabel3.setPreferredSize (New Dimension (645,80));                        This.centerlabel.setPreferredSize (New Dimension (460,80));            Centerlabel.setlayout (New GridLayout (2,1));            Centerlabel.add (This.startbutton);                        Centerlabel.add (This.exitbutton);                        This.centerlabel.setBackground (New Color (255,255,0));            This.add (Helplabel,borderlayout.north); This.add(Helplabel1,borderlayout.east);            This.add (helplabel2,borderlayout.west);            This.add (Helplabel3,borderlayout.south);                                               This.add (Centerlabel,borderlayout.center);           Image = Toolkit.getdefaulttoolkit (). GetImage ("imgs/main interface 112.png");                      Image = new ImageIcon (image). GetImage ();                                   This.startButton.addActionListener (new ActionListener () {                                           public void actionperformed (ActionEvent e) {                                           Boolean flag = true;                                           MainPanel.this.setIsStart (flag);                                   MainPanel.this.obs.notifyObservers (Mainpanel.this);                      }                           }                           );                     This.exitButton.addActionListener (      New ActionListener () {public void actionperformed (actio                                   Nevent e) {MainPanel.this.setExit (true);                }                           }                           );                                } public void Paint (Graphics g) {super.paint (g);                    graphics2d g2 = (graphics2d) g;                                G2.drawimage (image,0,0, This.getwidth (), This.getheight (), this);                        Super.paintcomponents (g);        } public boolean Getisstart () {return this.isstart;        The public void Setisstart (Boolean isstart) {this.isstart = Isstart;        } public boolean isexit () {return isexit;    } public void Setexit (Boolean isexit) {            This.isexit = Isexit; }                }

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Java Submarine War game source project