Stars that can drop and slide

Divided into two categories

1. Main class, is to design the main interface and part of the event monitoring Myball.java (no guide package)

 Public classMyballextendsJFrame { Public Static BooleanIsdown;  Public Static intNumber_star = 0;//(1)    Private Static Final LongSerialversionuid = 1L; Dimension Screen=Toolkit.getdefaulttoolkit (). Getscreensize (); JMenuBar MenuBar=NewJMenuBar ();    JLabel menu;    Jradiobutton Rdbtnslop, Rdbtndown;    JTextField Txtnumber;    Buttongroup BTNGP;    JLabel label;    JButton Btnalert;  PublicMyball () {Super("Meteor = snow in the sky");        Setdefaultcloseoperation (Jframe.exit_on_close);    Init (); }    Private voidinit () { This. Getcontentpane (). SetBackground (Color.Black);  This. setSize (screen); Menu=NewJLabel ("Style:"); Rdbtnslop=NewJradiobutton ("Slash meteor type")); Rdbtndown=NewJradiobutton ("Drop type")); Txtnumber=NewJTextField ("Please enter the number of Stars ~ ~ ~ Return"); Label=NewJLabel ("Change the number of stars:"); Rdbtnslop.setselected (true); Btnalert=NewJButton ("Hint");        Btnalert.setbackground (Color.orange); Btnalert.settooltiptext ("Please change within the 1-201 range"); BTNGP=NewButtongroup ();  This. Setjmenubar (menubar);        Menubar.add (menu);        Btngp.add (Rdbtnslop);        Btngp.add (Rdbtndown);        Menubar.add (Rdbtnslop);        Menubar.add (Rdbtndown); Menubar.add (Box.createhorizontalstrut (20));        Menubar.add (label);        Menubar.add (Txtnumber);        Menubar.add (Btnalert); Btnalert.addactionlistener (NewActionListener () { Public voidactionperformed (ActionEvent e) {Joptionpane.showmessagedialog (NULL, "Only 1-201 of the number can be entered as the number of stars, otherwise it will be wrong", "Tips", Joptionpane.warning_message);        }        }); Rdbtndown.addmouselistener (NewMouseadapter () {//mouse click Drop Type                     Public voidmouseclicked (MouseEvent e) {Isdown=true;        }                }); Rdbtnslop.addmouselistener (NewMouseadapter () {//mouse click Diagonal Streamline                     Public voidmouseclicked (MouseEvent e) {Isdown=false;        }                }); Txtnumber.addkeylistener (NewKeyadapter () {//keyboard Enter to get the number of stars                     Public voidkeypressed (KeyEvent e) {if(E.getkeychar () = =keyevent.vk_enter) {                            intNumber =Integer.parseint (Txtnumber.gettext (). Trim ());//(2)                            if(Number > 0 && number < 202) Number_star=Number ; ElseJoptionpane.showmessagedialog (NULL,                                        "Please enter one of the numbers in 1-201 as the number of stars.");        }                    }                }); Txtnumber.addfocuslistener (NewFocusadapter () {//Star number text box get and release focus                     Public voidfocusgained (focusevent e) {Txtnumber.settext (""); }                     Public voidFocuslost (focusevent e) {Txtnumber.settext ("Please enter the number of stars ~ ~ ~" Return);    }                }); }     Public Static voidMain (string[] args) {Myball ball=NewMyball ();        Frommypanel MP; MP=NewFrommypanel ();        Ball.add (MP); Thread th=NewThread (MP);        Th.start (); Ball.setvisible (true); }}

2. Want the interface to fill the stars and the moon and apply multithreading to the stars Frommypanel.java

classFrommypanelextendsPanelImplementsRunnable {Private Static Final LongSerialversionuid = 1L; Private Static intN = 101;//Number of stars//(3)Dimension screen =Toolkit.getdefaulttoolkit (). Getscreensize (); Random Rand=NewRandom (); intX[] =New int[201];//(4)    intY[] =New int[201];//(5)    intR, GG, B;//The colors of the stars are red, green, and blue.     PublicFrommypanel () { for(inti = 0; I < This. GETN (); i++) {//(6)X[i] = Rand.nextint ((int) Screen.getwidth ()); Y[i]= Rand.nextint ((int) Screen.getheight ()); }    }     Public voidPaint (Graphics g) {G.setcolor (color.white);//MoonG.filloval (900, 50, 100, 100);        G.setcolor (Color.Black); G.filloval (880, 30, 100, 100); G.setfont (NewFont ("", 0, 35)); R= Rand.nextint (255); GG= Rand.nextint (255); b= Rand.nextint (255); G.setcolor (NewColor (R, GG, b));//the color of the stars//G.setcolor (color.white);        Try {             for(inti = 0; I < This. GETN (); i++) {//(7)g.DrawString ("*", X[i], y[i]); }        } Catch(Exception e) {Joptionpane.showmessagedialog (NULL, E.getmessage ()); }    }     Public voidrun () { while(true) {             for(inti = 0; I < This. GETN (); i++) {//(8)//slide diagonally, if you want to see the downward direction of the slide, please comment out the following code                if(!myball.isdown) {if(i% 20 = = 0) {//only the stars in multiples of 20 in the following table are moving, i.e. 0,20,40,60,80x[i]++;//bottom Right Slidey[i]++; if(Y[i] > (int) Screen.getheight ()) {Y[i]= 0; }                        if(X[i] > (int) Screen.getwidth ()) {X[i]= 0; }                    }                }                //slide vertically, if you want to see the diagonal slide, please comment out the code above                if(myball.isdown) {if(i% 3 = = 0) Y[i]+ = 10; Y[i]+ = 10;//slipped                    if(Y[i] > (int) Screen.getheight ()) {Y[i]= 40; }                    if(X[i] > (int) Screen.getwidth ()) {X[i]= 10; }                }            }            Try{Thread.Sleep (30);            Repaint (); } Catch(interruptedexception e) {Joptionpane.showmessagedialog (NULL, E.getmessage ()); }        }    }     Public intGetn () {//get the number of stars entered, but one thing, the number of inputs greater than 201 will go wrong, the Association code is (1)-(8)        returnMyball.number_star! = 0?myball.number_star:n; }}

Stars that can drop and slide