/** 
 * Created by Abhinav Srinivasan on 6/28/2018. 
*/ 


import java.awt.Color; 
import java.awt.Container; 
import java.awt.Font; 
import java.awt.Graphics; 
import java.awt.Graphics2D; 
import java.awt.RenderingHints; 
import java.awt.font.FontRenderContext; 
import java.awt.font.LineMetrics; 
import java.awt.geom.Line2D; 

import javax.swing.JComponent; 
import javax.swing.JFrame; 

public class HelloWorld { 
    public static void main(String[] args) { 
        JFrame jf = new JFrame("Demo"); 
        Container cp = jf.getContentPane(); 
        MyCanvas tl = new MyCanvas(); 
        cp.add(tl); 
        jf.setSize(600, 400); 
        jf.setVisible(true); 
    } 
} 

class MyCanvas extends JComponent { 

    public void paint(Graphics g) { 
        Graphics2D g2 = (Graphics2D) g; 

        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); 
        //Font font = new Font("Serif", Font.PLAIN, 72); 
        Font font = new Font("Serif", Font.PLAIN, 133333); 
        g2.setFont(font); 

        String s = "This is a sample string"; 
        float x = 50, y = 150; 

        FontRenderContext frc = g2.getFontRenderContext(); 
        float width = (float) font.getStringBounds(s, frc).getWidth(); 
        Line2D baseline = new Line2D.Float(x, y, x + width, y); 
        g2.setPaint(Color.lightGray); 
        g2.draw(baseline); 

        // Draw the ascent. 
        LineMetrics lm = font.getLineMetrics(s, frc); 
        // Print the LineMetrics 
        System.out.println(lm.getAscent()); 

        Line2D ascent = new Line2D.Float(x, y - lm.getAscent(), x + width, y - lm.getAscent()); 
        g2.draw(ascent); 

        // Draw the descent. 
        Line2D descent = new Line2D.Float(x, y + lm.getDescent(), x + width, y + lm.getDescent()); 
        g2.draw(descent); 

        // Draw the leading. 
        Line2D leading = new Line2D.Float(x, y + lm.getDescent() + lm.getLeading(), x + width, y 
                + lm.getDescent() + lm.getLeading()); 
        g2.draw(leading); 

        // Render the string. 
        g2.setPaint(Color.black); 
        //g2.drawString(s, x, y); 
        g2.drawString(String.valueOf(lm.getAscent()), x, y); 
    } 

}