문제

마우스를 클릭한 위치에서 선물이 아래로 떨어지는 문제입니다 이를 해결하는 다음 프로그램에 대해 빈칸을 채우세요

코드 빈칸 채우기

import javax.swing.*; 
	 
public class PresentDropGUIMain 
{ 
	public static void main(String[] args) 
	{ 
		final String background = "C:\\Users\\user\\Downloads\\JAVA-main\\Chapter13\\image\\background.jpg"; 
 
		 frame = new  ( "선물 배달" ); 
		frame.getContentPane().add( new PresentDropPanel( background ) ); 
		frame.pack(); 
		frame.setVisible(true); 
		frame.setDefaultCloseOperation( .EXIT_ON_CLOSE ); 
	} 
} 
 
import java.awt.*; 
import java.awt.event.*; 
import javax.swing.*; 
import java.util.; 
 
public class PresentDropPanel   { 
	protected <Present> presents; 
	protected Image background; 
	public PresentDropPanel( String background ) { 
		this.presents = new <Present>(); 
		this.background = new ( background ).(); 
		setPreferredSize( new Dimension( 400, 400 ) ); 
		setFocusable( true ); 
		requestFocus(); 
		 
		this.( new () { 
			@Override 
			public void (  event ) { 
				presents.add( new Present( event.(), event.() ) ); 
			} 
		} ); 
		 timer = new ( 50, new () { 
			@Override 
			public void (  event ) { 
				for( Present present : presents ) 
					present.drop(); 
				(); 
			} 
		} ); 
		timer.(); 
	} 
	 
	@Override 
	public void ( Graphics g ) { 
		super.paintComponent( g ); 
		g.( background, 0, 0, null ); 
		for( Present present : presents ) 
			present.(g); 
	} 
} 
 
import java.awt.*; 
		 
public class Present 
{ 
	int x, y; 
	public Present( int x, int y ) { 
		this.x = x; 
		this.y = y; 
	} 
	public void drop() { 
		this.y += 10; 
	} 
	public void ( Graphics g ) { 
		g.setColor( Color.red ); 
		g.fillRect( x,    y,    10, 10 ); 
		g.fillRect( x+20, y,    10, 10 ); 
		g.fillRect( x,    y+20, 10, 10 ); 
		g.fillRect( x+20, y+20, 10, 10 ); 
		g.setColor( new Color( 0, 100, 0 ) ); 
		g.fillRect( x+10, y,    10, 30 ); 
		g.fillRect( x,    y+10, 30, 10 ); 
	} 
}