java - How to handle two different objects in the same JPanel at the same time? -


i trying make simple java game object coming toward static object or character , if press "space" button static object jump , avoid collision. successful make first object moving couldn't make static object jump or move. tried using keyevent didn't work. how can make work? or can point out doing wrong in code? 

package jpanel;  import java.awt.*; import javax.swing.*; import java.awt.event.actionevent; import java.awt.event.actionlistener; import java.awt.event.keyevent;  public class jp extends jpanel implements actionlistener{     timer t;     int x,y,k;     jp(){         x=650;         k=0;         t=new timer(5,this);         t.start();     }     public void actionperformed(actionevent e){         x--;         //k++;         if(x==76){             x=650;         }         repaint();     }       public void keypressed(keyevent e){         int key=e.getkeycode();             if(key == keyevent.vk_space){                 k++;                /* if(k>300){                     k=0;                 }*/                 repaint();             }         }      public void paintcomponent(graphics g){         super.paintcomponent(g);         this.setbackground(color.black);         g.setcolor(color.blue);         g.fillrect(x,400,50,50);//moving object         g.setcolor(color.red);         //static object         g.fillrect(30, 350-k, 45, 70);//static_body         g.setcolor(color.yellow);         g.filloval(28, 310-k, 40, 40);//static_head         g.setcolor(color.green);         g.fillrect(30, 420-k, 10, 35);//static_leg1         g.fillrect(65, 420-k, 10, 35);//static_leg2         g.setcolor(color.blue);         g.fillrect(35, 350-k, 10, 45);//static_hand         g.setcolor(color.black);         g.filloval(55, 320-k, 7, 7);//static_eye     } }  public class jpanel extends jframe {       public static void main(string[] args) {         jp p=new jp();          jframe j=new jframe("test_case-1");         j.add(p);         j.setdefaultcloseoperation(jframe.exit_on_close);         j.setsize(700,500);         j.setvisible(true);     }  }

not sure you're trying do, if want listen key events, must register listener (in constructor, instance):

addkeylistener(new keyadapter() {     public void keypressed(keyevent evt) {         ...     } );

Comments

Post a Comment

Popular posts from this blog

android - InAppBilling registering BroadcastReceiver in AndroidManifest -

i'm implementing inapp billing in android app. works well, however, i'm trying decouple broadcast receiver activity manifest. suggestion in android's trivialdrive sample: // important: dynamically register broadcast messages updated purchases. // register receiver here instead of <receiver> in manifest // because call getpurchases() @ startup, therefore can ignore // broadcasts sent while app isn't running. // note: registering listener in activity bad idea, done here // because sample. regardless, receiver must registered after // iabhelper setup, before first call getpurchases(). currently there's class extends broadcastreceiver : public class iabbroadcastreceiver extends broadcastreceiver { /** * intent action receiver should filter for. */ public static final string action = "com.android.vending.billing.purchases_updated"; private final iabbroadcastlistener mlistener; public iabbroadcastreceiver(iabbroadcastlistener listener) { m...
Read more

python Tkinter Capturing keyboard events save as one single string -

is possible store keyboard events 1 string? code below stores 1 char , prints it. card reader or bar code reader, contains collection of character/ string not 1 character @ time. goal save char pressed text variable. from tkinter import * root = tk() def key(event): text= event.char text+= event.char print ("pressed", text) def callback(event): frame.focus_set() print ("clicked at", event.x, event.y) frame = frame(root, width=100, height=100) frame.bind("<key>", key) frame.bind("<button-1>", callback) frame.pack() root.mainloop() currently, creating text variable , everytime key() function gets called, , text stores last character typed. you can define text module level variable , , use module level text inside key function - text = '' def key(event): global text text+= event.char print("pressed", text)
Read more

sql server - Why does Linq-to-SQL add unnecessary COUNT()? -

here tables: create table customer ( cid int primary key, name varchar(32) ) create table ord ( oid int primary key, cid int foreign key references customer, address varchar(20) ) here's linq-to-sql statement: var aaa = c in db.customer select new { c, o = c.ord.tolist() }; and here's inexplicable query generated linq-to-sql: select [t0].[cid] [cid], [t0].[name] [name], [t1].[oid] [oid], [t1].[cid] [cid2], [t1].[address] [address], (select count(*) [dbo].[ord] [t2] [t2].[cid] = [t0].[cid]) [value] [dbo].[customer] [t0] left outer join [dbo].[ord] [t1] on [t1].[cid] = [t0].[cid] order [t0].[cid], [t1].[oid] i want understand how rid of count(*) part. it's entirely uncalled for! linq needs count(*) in order determine number of entries returned o = c.ord.tolist() .
Read more