자바 (for문과 if문) 코딩 쌩기초질문 내공100

import javax.swing.*;

import java.awt.*;

import java.awt.image.BufferedImage;

​

public class RadialGradientExample {

public static void main(String[] args) {

JFrame frame = new JFrame("Radial Gradient Example");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setSize(800, 600);

frame.add(new RadialGradientPanel());

frame.setVisible(true);

}

}

​

class RadialGradientPanel extends JPanel {

@Override

protected void paintComponent(Graphics g) {

super.paintComponent(g);

Graphics2D g2d = (Graphics2D) g;

​

int width = getWidth();

int height = getHeight();

int centerX = width / 2;

int centerY = height / 2;

​

Color centerColor = Color.RED; // 중앙 색상 (빨간색)

Color outerColor = Color.BLUE; // 바깥 색상 (파란색)

​

RadialGradientPaint gradient = new RadialGradientPaint(centerX, centerY, width / 2, new float[]{0.0f, 1.0f}, new Color[]{centerColor, outerColor});

g2d.setPaint(gradient);

g2d.fillRect(0, 0, width, height);

}

}

​

​

​

​

FOR 문을 굳이 사용하시겠다면

import java.awt.Color;

import java.awt.Graphics;

import java.awt.Graphics2D;

​

import javax.swing.JFrame;

import javax.swing.JPanel;

​

public class RadialGradientExample {

public static void main(String[] args) {

JFrame frame = new JFrame("Radial Gradient Example");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setSize(800, 600);

frame.add(new RadialGradientPanel());

frame.setVisible(true);

}

}

​

class RadialGradientPanel extends JPanel {

@Override

protected void paintComponent(Graphics g) {

super.paintComponent(g);

Graphics2D g2d = (Graphics2D) g;

​

int width = getWidth();

int height = getHeight();

int centerX = width / 2;

int centerY = height / 2;

​

for (int x = 0; x < width; x++) {

for (int y = 0; y < height; y++) {

double distance = Math.sqrt((x - centerX) * (x - centerX) + (y - centerY) * (y - centerY));

int maxDistance = (int) Math.sqrt(centerX * centerX + centerY * centerY);

​

// 중앙에서 바깥으로 갈수록 색상 변경

int r = (int) (255 * (1 - (double) distance / maxDistance));

int g1 = 0;

int b = (int) (255 * (double) distance / maxDistance);

​

g2d.setColor(new Color(r, g1, b));

g2d.fillRect(x, y, 1, 1);

}

}

}

}