Ex13_302

import java.awt.*;
import java.awt.geom.Rectangle2D;
import javax.swing.JFrame;

public class Ex13_302 extends JFrame {

	public Ex13_302() {
		setTitle("漸層色");
		// 設定視窗大小
		setSize(300, 300);
		// 設定視窗大小不可更改
		setResizable(false);
		// 顯示視窗物件
		this.setVisible(true);
	}

	public static void main(String[] args) {
		new Ex13_302();
	}

	public void paint(Graphics g) {

		// 建立Graphics2D子類別實體
		Graphics2D G2D = (Graphics2D) g;

		// 設定漸層色物件
		// new GradientPaint(起始x, 起始y, 起始顏色, 終止x, 終止y, 中止顏色);
		GradientPaint gr1 = new GradientPaint(50, 50, Color.red, 150, 150,
				Color.white);
		// 設定繪圖樣式
		G2D.setPaint(gr1);
		// 填滿矩形
		Rectangle2D rd1 = new Rectangle2D.Double(50, 50, 100, 100);
		G2D.fill(rd1);

		
		GradientPaint gr2 = new GradientPaint(180, 50, Color.blue, 280, 150,
				Color.white);
		G2D.setPaint(gr2);
		Rectangle2D rd2 = new Rectangle2D.Double(180, 50, 100, 100);
		G2D.fill(rd2);

		GradientPaint gr3 = new GradientPaint(50, 180, Color.orange, 150, 280,
				Color.white);
		G2D.setPaint(gr3);
		Rectangle2D rd3 = new Rectangle2D.Double(50, 180, 100, 100);
		G2D.fill(rd3);
		
		GradientPaint gr4 = new GradientPaint(180, 180, Color.green, 280, 280,
				Color.white);
		G2D.setPaint(gr4);
		Rectangle2D rd4 = new Rectangle2D.Double(180, 180, 100, 100);
		G2D.fill(rd4);
		

	}
}