jframe - Java Game actionPerformed questions -


hi i've made game similar doodle jump jumper/object jumping next platform on top , if fall of lose. anyway game works there 1 problem, i've make if press on space bar jumper/object jumps up, ok here problem: if keep holding on space bar jumper keep moving until let go of space bar, how make when press or hold on space bar jumper/object jumps ones rather keeps going until let go of space bar?

here's what's going on in code:

here action performed class jumper jumps or down

static boolean gameplay=false; public void actionperformed(actionevent e) {     // todo auto-generated method stub      if (gameplay==true){         if (jumper==true){             doodleheight+20;         }         if (jumper==false){             doodleheight=doodleheight-10;         }

here have keys controls jumps

public void keypressed(keyevent e) {     // todo auto-generated method stub     if (e.getkeycode()==keyevent.vk_space){         jumper=true;     }    } @override public void keyreleased(keyevent e) {     // todo auto-generated method stub     if (e.getkeycode()==keyevent.vk_space){         jumper=false;     } }

how fix problem? need , can't figure out.

here code flag:

import java.awt.event.*; import java.awt.*; import java.util.scanner;  import javax.swing.*; public class doodlejumpp extends jpanel implements actionlistener,keylistener{ static jframe f; static int width=1200, height=930; static int doodlew=500, doodleh=500; static int doodleplatformwidth=200, doodleplatformheight=400; static int doodleplatformwidth1=400, doodleplatformheight1=530; static int doodleplatformwidth2=900, doodleplatformheight2=874; static int doodleplatformwidth3=345, doodleplatformheight3=643; static int doodleplatformwidth4=711, doodleplatformheight4=957; static boolean rightjumper,leftjumper; static boolean jumper; static boolean test=true; static boolean gameplay=true; public void paintcomponent (graphics g){     g.setcolor(color.green);     g.fillrect(doodleplatformwidth, doodleplatformheight,200,30);     g.fillrect( doodleplatformwidth1, doodleplatformheight1,200,30);     g.fillrect( doodleplatformwidth2, doodleplatformheight2,200,30);     g.fillrect( doodleplatformwidth3, doodleplatformheight3,200,30);     g.fillrect( doodleplatformwidth4, doodleplatformheight4,200,30);     g.setcolor(color.blue);     g.fillrect(doodlew, doodleh,50,50); } public static void main(string a[]){     doodlejumpp d = new doodlejumpp();     f = new jframe();     d.init();     f.add(d);     f.setsize(width,height);     f.setvisible(true);     f.repaint();     f.setdefaultcloseoperation(jframe.exit_on_close);     timer t=new timer(10,d);     t.start(); } public void init (){     this.addkeylistener(this);     setfocusable(true); } @override public void actionperformed(actionevent e) {     // todo auto-generated method stub     if (gameplay==true){         if (jumper==true&&test==false){             doodleplatformheight=doodleplatformheight+20;             doodleplatformheight1=doodleplatformheight1+20;             doodleplatformheight2=doodleplatformheight2+20;             doodleplatformheight3=doodleplatformheight3+20;             doodleplatformheight4=doodleplatformheight4+20;         }         if (jumper==false&&test==false){             doodleplatformheight=doodleplatformheight-10;             doodleplatformheight1=doodleplatformheight1-10;             doodleplatformheight2=doodleplatformheight2-10;             doodleplatformheight3=doodleplatformheight3-10;             doodleplatformheight4=doodleplatformheight4-10;         }         if (leftjumper==true&&test==false){             doodlew=(doodlew-15);         }         if (rightjumper==true&&test==false){             doodlew=(doodlew+15);         }         if (doodleplatformheight>height){             doodleplatformwidth=(int) math.floor(math.random()*1201);             doodleplatformheight=0;         }         if (doodleplatformheight1>height){             doodleplatformwidth1=(int) math.floor(math.random()*1201);             doodleplatformheight1=0;         }         if (doodleplatformheight2>height){             doodleplatformwidth2=(int) math.floor(math.random()*1201);             doodleplatformheight2=0;         }         if (doodleplatformheight3>height){             doodleplatformwidth3=(int) math.floor(math.random()*1201);             doodleplatformheight3=0;         }         if (doodleplatformheight4>height){             doodleplatformwidth4=(int) math.floor(math.random()*1201);             doodleplatformheight4=0;         }         if (doodleh==doodleplatformheight-50 && doodlew>=doodleplatformwidth-30  && doodlew<=doodleplatformwidth+180){             test=true;         }         if (doodleh==doodleplatformheight1-50 && doodlew>=doodleplatformwidth1-30  && doodlew<=doodleplatformwidth1+180){             test=true;         }         if (doodleh==doodleplatformheight2-50 && doodlew>=doodleplatformwidth2-30  && doodlew<=doodleplatformwidth2+180){             test=true;         }         if (doodleh==doodleplatformheight3-50 && doodlew>=doodleplatformwidth3-30  && doodlew<=doodleplatformwidth3+180){             test=true;         }         if (doodleh==doodleplatformheight4-50 && doodlew>=doodleplatformwidth4-30  && doodlew<=doodleplatformwidth4+180){             test=true;         }         f.repaint();     } } static boolean flag=true; @override public void keytyped(keyevent e) {     // todo auto-generated method stub } @override public void keypressed(keyevent e) {     // todo auto-generated method stub     if (e.getkeycode()==keyevent.vk_space && flag == true){         flag = false;         jumper=true;         test=false;     }       if (e.getkeycode()==keyevent.vk_a){         leftjumper=true;     }     if (e.getkeycode()==keyevent.vk_d){         rightjumper=true;     } } @override public void keyreleased(keyevent e) {     // todo auto-generated method stub     if (e.getkeycode()==keyevent.vk_space){         flag = true;         jumper=false;      }     if (e.getkeycode()==keyevent.vk_a){         leftjumper=false;      }     if (e.getkeycode()==keyevent.vk_d){         rightjumper=false;     } } }

the problem bringing down character when key released !

specifically logic:

@override public void keyreleased(keyevent e) {     // todo auto-generated method stub     if (e.getkeycode()==keyevent.vk_space){         jumper=false;     } }

and logic when actionperformed

    if (jumper==false){         doodleheight=doodleheight-10;     }

you need similar gravity after few time lapse brings down character ground level

one way use timertask starts character jumps , task on every timer tick reduces height of character until 0 or same before jumped.


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