Thread: Java applet wrap around.

Hey,

I'm learning java and I was wondering how to make the text in my applet go down a line
when I enter the text in the console.

Thanks!!!

	int x = 25 - 1;
	int y= 50 - 1;
 
 
 
 
	public void paint(Graphics g) {
		Scanner sc = new Scanner(System.in);
 
 
		while(true) {
 
 
			String message = sc.nextLine();
 
			 g.drawString(message, x, y);
 
 
		}
 
 
 
 
	}

You need to look at FontMetrics or LineMetrics and determine the height of the letter(s) based on the Font. Then you need to adjust the y value accordingly. And applets are pretty much obsolete and very few browsers still support them.

Regards,
Jim

Font f = g.getFont(); (if no font is defined, the set it). See the Font class for details.
Linemetrics lm = f.getLineMetrics(<arguments go here>);
int h = lm.getHeight();
y = y+h;
Now redraw your string.

You need to read the Java API to understand this. That is essential to programming in Java.

Regards
Jim

Because this topic can be confusing and it can also be done different ways (FontMetrics vs LineMetrics), I created this example for you to use as a reference. Some of this could be simplified with helper methods. Also, I don't do much of this so there may also be more efficient ways.

Regards,
Jim

import java.awt.*;
import java.awt.font.*;
import java.awt.geom.*;
import javax.swing.*;
 
public class HelloWorld extends JPanel {
 
   JFrame			 frame		= new JFrame("Hello World");
   Font				 font		= new Font("Arial", Font.PLAIN, 48);
   String			 firstLine	= "Hello";
   String			 secondLine	= "World";
   FontRenderContext frc		= new FontRenderContext(null, true, true);
   LineMetrics		 lm			= font.getLineMetrics("Hello World", frc);
 
   public static void main(String[] args) {
          // schedule for the EDT
          // the method start() just gets us out of static context
	  SwingUtilities.invokeLater(() -> new HelloWorld().start());
 
   }
 
   public void start() {
          // basic bookkeeping to create a panel in a frame and display
	  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	  setPreferredSize(new Dimension(400, (int) (400 * .618)));
	  setBackground(Color.white);
	  frame.add(this);
	  frame.pack();
	  frame.setLocationRelativeTo(null); // center on screen
	  frame.setVisible(true);
   }
 
   public void paintComponent(Graphics g) {
	  super.paintComponent(g);
	  Graphics2D g2d = (Graphics2D) g;
 
	  // smooth out the graphics
	  g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
	        RenderingHints.VALUE_ANTIALIAS_ON);
 
	  g2d.setFont(font);
 
          // Center in the panel.  I guess for the height but 
          // the horizontal centering was computed.
 
	  int h = (int) lm.getHeight();
	  TextLayout tm = new TextLayout("Hello", font, frc);
	  Rectangle2D rect = tm.getBounds();
	  float w = (float) rect.getWidth();
	  g2d.drawString("Hello", (400 - w) / 2, 100);
 
	  tm = new TextLayout("World", font, frc);
	  rect = tm.getBounds();
	  w = (float) rect.getWidth();
	  g2d.drawString("World", (400 - w) / 2, 100 + h);
 
   }
 
}