java - How to move button when you put the mouse over it -
i have jframe 2 buttons: "yes" , "no". , move "yes" button every time user places mouse on it, way user "chasing" it.
here's code:
import java.awt.*; import java.awt.borderlayout; import java.awt.event.actionevent; import java.awt.event.actionlistener; import java.awt.event.mouselistener; import java.awt.event.mousemotionlistener; import java.awt.event.mouseevent; import javax.swing.*; // import javax.swing.jlabel; // import javax.swing.jpanel; public class beachpartyprimerframe extends jframe { private jpanel mousepanel; // panel in mouse events occur private jlabel statusbar; // label displays event information private jlabel party, study; private jbutton yesbutton, yes2button, nobutton; private int locx []= {200, 100, 500, 200}; private int locy [] = {20, 200, 200, 300}; private int count = 0; private int mod = 4; private boolean nobuttonhit = false; // mousetrackerframe constructor sets gui , // registers mouse event handlers public beachpartyprimerframe() { super( "demonstrating mouse events" ); mousepanel = new jpanel(); // create panel mousepanel.setbackground( color.white ); // set background color mousepanel.setlayout(null); add( mousepanel, borderlayout.center ); // add panel jframe statusbar = new jlabel( "mouse outside jpanel" ); add( statusbar, borderlayout.south ); // add label jframe party = new jlabel ("do want beach party right now?"); add (party, borderlayout.north); study = new jlabel ("great! keep studying hard!!"); study.setvisible(false); study.setfont(new font("serif",font.plain, 24)); study.setforeground(color.red); study.setsize(400,80); study.setlocation(100,200); yesbutton = new jbutton ("yes"); yesbutton.setsize (60,40); yesbutton.setlocation(200, 20); nobutton = new jbutton ("no"); nobutton.setsize(60,40); nobutton.setlocation (320, 20); buttonhandler bhandler = new buttonhandler(); yesbutton.addactionlistener (bhandler); nobutton.addactionlistener(bhandler); mousepanel.add(yesbutton); mousepanel.add(nobutton); mousepanel.add(study); // create , register listener mouse , mouse motion events mousehandler handler = new mousehandler(); mousepanel.addmouselistener( handler ); mousepanel.addmousemotionlistener( handler ); } // end mousetrackerframe constructor public void hidebuttons () { system.out.println ("try hide buttons"); yesbutton.setvisible(false); } private class buttonhandler implements actionlistener { // handle button event public void actionperformed( actionevent event ) { if (event.getactioncommand() == "no") { system.out.println ("no button hit"); } else { system.out.println ("yes button pressed"); yesbutton.setlocation(yesbutton.getx(), yesbutton.gety() + 60); } } // end method actionperformed } // end private inner class buttonhandler private class mousehandler implements mouselistener, mousemotionlistener { // mouselistener event handlers // handle event when mouse released after press public void mouseclicked( mouseevent event ) { statusbar.settext( string.format( "clicked @ [%d, %d]", event.getx(), event.gety() ) ); if (event.ismetadown()) system.out.println("right button clicked"); else system.out.println("left button clicked"); } // end method mouseclicked // handle event when mouse pressed public void mousepressed( mouseevent event ) { statusbar.settext( string.format( "pressed @ [%d, %d]", event.getx(), event.gety() ) ); } // end method mousepressed // handle event when mouse released after dragging public void mousereleased( mouseevent event ) { statusbar.settext( string.format( "released @ [%d, %d]", event.getx(), event.gety() ) ); } // end method mousereleased // handle event when mouse enters area public void mouseentered( mouseevent event ) { statusbar.settext( string.format( "mouse entered @ [%d, %d]", event.getx(), event.gety() ) ); mousepanel.setbackground( new color (255, 255,0)); } // end method mouseentered // handle event when mouse exits area public void mouseexited( mouseevent event ) { statusbar.settext( "mouse outside jpanel" ); mousepanel.setbackground( color.white ); } // end method mouseexited // mousemotionlistener event handlers // handle event when user drags mouse button pressed public void mousedragged( mouseevent event ) { statusbar.settext( string.format( "dragged @ [%d, %d]", event.getx(), event.gety() ) ); } // end method mousedragged // handle event when user moves mouse public void mousemoved( mouseevent event ) { statusbar.settext( string.format( "moved @ [%d, %d]", event.getx(), event.gety() ) ); } // end method mousemoved } // end inner class mousehandler } // end class mousetrackerframe and here's driver class:
import javax.swing.jframe; public class beachpartyprimer { public static void main( string args[] ) { beachpartyprimerframe mousetrackerframe = new beachpartyprimerframe(); mousetrackerframe.setdefaultcloseoperation( jframe.exit_on_close ); mousetrackerframe.setsize( 600, 400 ); // set frame size mousetrackerframe.setvisible( true ); // display frame } // end main } // end class mousetracker here's screenshot of how looks like: 
currently, if click "yes", button moves down little bit: 
but said beofre, change , make user chasing it.
you add mouselistener yesbutton. override mouseentered method , set random position button :
yesbutton.addmouselistener(new mouseadapter() { public void mouseentered(java.awt.event.mouseevent evt) { yesbutton.setlocation(new random().nextint(600), new random().nextint(400)); } }); i created random position x , y in range 600 , 400 (your window size), can of course adjust it.
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