컴퓨터 활용 과 실습1


                  애프릿에서의 그래픽



/*
<html>
<head><title>그래픽 객체예제 - 선그리기</title></head>
<body>
<applet code="GraphicsLine" width=350 height=300>
</applet>
</body>
</html>
*/
import java.awt.*;
import java.applet.*;

public class GraphicsLine extends Applet {
  public void paint(Graphics g) {
    g.drawLine(10, 10, 100, 10);
    g.drawLine(100, 10, 100, 100);
    g.drawLine(100, 100, 10, 100);
    g.drawLine(10, 100, 10, 10);
    g.drawLine(10, 10, 100, 100);
    g.drawLine(10, 100, 100, 10);
  }
}
/*
<html>
<head><title>그래픽 객체예제 - 사각형그리기</title></head>
<body>
<applet code="GraphicsRectangles" width=350 height=300>
</applet>
</body>
</html>
*/
import java.awt.*;
import java.applet.*;

public class GraphicsRectangles extends Applet {
  public void paint(Graphics g) {
    g.drawRect(10, 10, 100, 100);
    g.fillRect(120, 10, 100, 100);
    g.fillRoundRect(10, 120, 100, 100, 15, 15);
    g.drawRoundRect(120, 120, 100, 100, 30, 40);
  }
}
/*
<html>
<head><title>그래픽 객체예제 - 원 & 호 </title></head>
<body>
<applet code="GraphicsCircle" width=350 height=300>
</applet>
</body>
</html>
*/
import java.awt.*;
import java.applet.*;

public class GraphicsCircle extends Applet {
  public void paint(Graphics g) {
    g.drawOval(10, 10, 50, 50);
    g.fillOval(100, 10, 75, 50);
    g.drawArc(210, 50, 70, 70, 0, 75);
    g.fillArc(150, 50, 90, 90, 0, 75);
    g.drawArc(10, 100, 70, 80, 0, 175);
    g.fillArc(100, 100, 70, 90, 180, 270);
  }
}
/*
<html>
<head><title>동적그래픽 사각형그리기</title></head>
<body>
<applet code="DynamicRectangle" width=350 height=300>
</applet>
</body>
</html>
*/
import java.applet.*;
import java.awt.*;

public class DynamicRectangle extends Applet {
  public void paint(Graphics g) {
    Dimension d = getSize();
    int v = d.width/2;
    int h = d.height/2;
    int radius = (int)((d.width < d.height) ? 
            0.4 * d.width : 0.4 * d.height);
    g.drawRect(v - radius, h - radius, 2 * radius, 2 * radius);
    }
}
/*
<html>
<head><title>Color예제</title></head>
<body>
<applet code="ColorFont" width=300 height=100>
</applet>
</body>
</html>
*/
import java.applet.Applet;
import java.awt.*;
public class ColorFont extends Applet {

  public void paint(Graphics g) {
    g.setColor(Color.red);
    g.drawString("알기쉽게 해설한 JAVA", 50, 50);
    g.setColor(Color.blue);
    g.drawString("객체지향 프로그래밍", 50, 80);
  }
}
/*
<html>
<head><title>Color 예제</title></head>
<body>
<applet code="ColorExam" width=300 height=200>
</applet>
</body>
</html> 
*/

import java.awt.*;
import java.applet.*;
public class ColorExam extends Applet {
  // draw lines
  public void paint(Graphics g) {
    Color c1 = new Color(255, 100, 100);
    Color c2 = new Color(100, 255, 100);
    Color c3 = new Color(100, 100, 255);

    g.setColor(c1);
    g.drawLine(0, 0, 100, 100);
    
    g.setColor(c2);
    g.drawLine(40, 25, 250, 180);
  
    g.setColor(c3);
    g.drawLine(20, 150, 400, 40);
   
    g.setColor(Color.red);
    g.drawOval(10, 10, 50, 50);
    g.fillOval(70, 90, 140, 100);

    g.setColor(Color.blue);
    g.drawOval(190, 10, 90, 30);
    g.drawRect(10, 10, 60, 50);

    g.setColor(Color.cyan);
    g.fillRect(100, 10, 60, 50);
    g.drawRoundRect(190, 10, 60, 50, 15, 15);
  }
}
/*
<html>
<head><title>Font예제</title></head>
<body>
<applet code="SetFont" width=400 height=150>
</applet>
</body>
</html>
*/

import java.awt.*;
import java.applet.*;

public class SetFont extends Applet {
   Graphics g;
   Font courier;
   Font timesroman;
   Font symbol;
   Font etc;
   
public void init() {
   courier = new Font("Courier",Font.BOLD,20);
   timesroman = new Font("Timesroman",Font.BOLD,20);
   symbol = new Font("Symbol",Font.BOLD,20);
   etc = new Font("굴림",Font.BOLD,20);
 }

public void paint(Graphics g) {
   g.setFont(courier);
   g.drawString("Teach you self JAVA : Courier ",20,20);
   g.setFont(timesroman);
   g.drawString("Complete Reference JAVA :  Timesoroman ",20,50);
   g.setFont(symbol);
   g.drawString("JAVA Tutorial :  Symbol ",20,82);
   g.setFont(etc);
   g.drawString("알기쉽게 해설한 자바 : 굴림체",20,118);
   }
}
/*
<html>
<head><title>Font예제</title></head>
<body>
<applet code="FontExample" width=400 height=200>
</applet>
</body>
</html>
*/
import java.applet.Applet;
import java.awt.*;

public class FontExample extends Applet {
  public void paint(Graphics g) {
    
    int baseline = 70;
    g.setColor(Color.red);
    g.drawLine(0, baseline, 350, baseline);
    // 빨간색으로 폰트의 기준선(baseline)을 긋는다
    Font font = new Font("SansSerif", Font.PLAIN, 30);
    g.setFont(font);
    g.setColor(Color.black);
    g.drawString("Hi java  안녕하세요?", 5, baseline);
    // 폰트를 설정한 다음 기준선에 문자열을 출력

    FontMetrics font1 = g.getFontMetrics(font);
    int ascent = font1.getAscent();
    // 폰트의 머리선(ascent) 크기를 얻는다
    int y = baseline - ascent;
    g.setColor(Color.green);
    g.drawLine(0, y, 350, y);
    // 머리선을 긋는다

    int descent = font1.getDescent();
    // 폰트의 꼬리선 크기를 얻는다
    y = baseline + descent;
    g.setColor(Color.blue);
    g.drawLine(0, y, 350, y);
    // 꼬리선을 긋는다
  }
}