この三角形の色を3行で塗りつぶすにはどうすればよいですか？

Question

私の先生は今週末にプロジェクトのために家を建てたいと思っていました。屋根のために使っている三角形の色を塗りつぶす方法を理解することができます。私はJavaで非常に新しいので、コードはかなりうまくありますが、誰かが私を助けることができたら、それは素晴らしいでしょう！（私の先生はコードの長さに本当に気をつけません。 。 ここに私のコード：

import java.awt.Color; 
import java.awt.Dimension; 
import javax.swing.SwingUtilities; 
import javax.swing.JFrame; 

public class HouseMaker 
{ 
    public static void main(String[] args) 
    { 
     JFrame frame = new JFrame(); 
     frame.setSize(3000, 3000); 
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); 

     frame.getContentPane().setBackground(Color.BLUE); 

     HouseComponent component = new HouseComponent(); 
     frame.add(component); 

     frame.setVisible(true); 
    } 
} 

import java.awt.Color; 
import java.awt.Graphics; 
import java.awt.Graphics2D; 
import java.awt.Rectangle; 
import java.awt.geom.Ellipse2D; 
import java.awt.geom.Line2D; 
import javax.swing.JComponent; 
import java.awt.Polygon; 

/* 
    A component that draws an house with a sun and other things 
*/ 
public class HouseComponent extends JComponent 
{ 
    public void paintComponent(Graphics g) 
    { 
     // Recover Graphics2D 
     Graphics2D g2 = (Graphics2D) g; 

     // Draw the house frame 
     g2.setColor(Color.GRAY); 
     Rectangle frame = new Rectangle(300, 400, 500, 230); 
     g2.fill(frame); 

     // Draw the roof 
     Line2D.Double roof = new Line2D.Double(300, 400, 800, 400); 
     g2.setColor(Color.RED); 
     g2.drawLine(300, 400, 550, 200); 
     g2.setColor(Color.RED); 
     g2.drawLine(800, 400, 550, 200); 
     g2.setColor(Color.RED); 
     g2.draw(roof); 

     //sun in the sky 
     g2.setColor(Color.YELLOW); 
     g.drawOval(50,50,100,100); 
     g2.setColor(Color.YELLOW); 
     g2.fillOval(50,50,100,100); 
     g2.drawLine(50,50,20,20); 
     g2.setColor(Color.YELLOW); 
     g2.drawLine(150,150,180,180); 
     g2.drawLine(150,50,180,20); 
     g2.drawLine(50,150,20,180); 
     g2.drawLine(30,100,-10,100); 
     g2.drawLine(100,30,100,-10); 
     g2.drawLine(170,100,210,100); 
     g2.drawLine(100,170,100,210); 

     //Draw the door 

     g2.setColor(Color.BLACK); 
     Rectangle door = new Rectangle(450, 510, 50, 120); 
     g2.fill(door); 

     //Draw door knob 
     g2.setColor(Color.WHITE); 
     g2.drawOval(450,560,10,10); 
     g2.setColor(Color.WHITE); 
     g2.fillOval(450,560,10,10); 

     //Draw three windows 

     g2.setColor(Color.BLACK); 
     Rectangle window = new Rectangle(350, 520, 50, 50); 
     g2.fill(window); 
     g2.setColor(Color.BLACK); 
     Rectangle window1 = new Rectangle(550, 520, 50, 50); 
     g2.fill(window1); 
     g2.setColor(Color.BLACK); 
     Rectangle window2 = new Rectangle(650, 520, 50, 50); 
     g2.fill(window2); 

     //Draw window panes 
     g2.setColor(Color.WHITE); 
     g2.drawLine(350,545,400,545); 
     g2.drawLine(375,520,375,570); 
     g2.drawLine(550,545,600,545); 
     g2.drawLine(575,520,575,570); 
     g2.drawLine(650,545,700,545); 
     g2.drawLine(675,520,675,570); 

     //Draw ground 
     g2.setColor(Color.GREEN); 
     Rectangle ground = new Rectangle(0, 630, 1500, 1500); 
     g2.fill(ground); 
    } 
} 

Answer 1

[OK]を、何か新しいことを学ぶ時間ですか？

/* Have a look over java.awt.geom.GeneralPath*/ 
// Draw the roof 
GeneralPath shape=new GeneralPath(); 
shape.moveTo(300, 400) 
shape.lineTo(800, 400); 
shape.lineTo(550, 200); 
shape.closePath(); // easier than shape.lineTo(300, 400); 
g2.setColor(Color.RED); 
g2.fill(shape); 

// let's get a tinge of pink for the outline; 
Stroke origStroke=g2.getStroke(); // just to restore it afterwards 
g2.setColor(Color.PINK); 
g2.setStroke(new BasicStroke(0.5f)); // WHOA, is that something new? 
g2.draw(shape); // reusing it, why bother creating other lines? 

// as we don't want the next drawing to go with a thin line, 
// restore the old stroke 
g2.setStroke(origStroke);