How to use

getFont

method

in

java.awt.Graphics

 public static void main(String[] args) throws Exception {
  final BufferedImage image = ImageIO.read(new URL(
    "http://upload.wikimedia.org/wikipedia/en/2/24/Lenna.png"));

  Graphics g = image.getGraphics();
  g.setFont(g.getFont().deriveFont(30f));
  g.drawString("Hello World!", 100, 100);
  g.dispose();

  ImageIO.write(image, "png", new File("test.png"));
}

 import java.awt.*;

public class TestComponent extends JPanel {

  private void drawString(Graphics g, String text, int x, int y) {
    for (String line : text.split("\n"))
      g.drawString(line, x, y += g.getFontMetrics().getHeight());
  }

  public void paintComponent(Graphics g) {
    super.paintComponent(g);
    drawString(g, "hello\nworld", 20, 20);
    g.setFont(g.getFont().deriveFont(20f));
    drawString(g, "part1\npart2", 120, 120);
  }

  public static void main(String s[]) {
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.add(new TestComponent());
    f.setSize(220, 220);
    f.setVisible(true);
  }
}

 public Font scaleFont(String text, Rectangle rect, Graphics g, Font pFont) {
  float fontSize = 20.0f;
  Font font = pFont;

  font = g.getFont().deriveFont(fontSize);
  int width = g.getFontMetrics(font).stringWidth(text);
  fontSize = (rect.width / width ) * fontSize;
  return g.getFont().deriveFont(fontSize);
}

private Font getFont(Graphics g, int size)
{
  Font font = new Font(DEFAULT_FONT_NAME, Font.PLAIN, size);
  if (font != null)
    return font;
  return g.getFont();
}
  

if (strikethrough) {
  int stPos = Math.round(lm.getStrikethroughOffset()) +
    g.getFont().getBaselineFor(chars[pos]) + 1;
    g.getFont().getBaselineFor(chars[pos]) + 1;

private Font getFont(Graphics g, int size)
{
  Font font = new Font(DEFAULT_FONT_NAME, Font.BOLD, size);
  if (font != null)
    return font;
  return g.getFont();
}
  

  public Point getToolTipLocation(MouseEvent e) {
    Graphics g = getGraphics();
    FontMetrics metrics = g.getFontMetrics(g.getFont());
    String prefix = itemnameHistory.size() <= 9 ? "8: " : "88: ";
    int prefixWidth = metrics.stringWidth(prefix);
    int x = JButton.TRAILING + JButton.LEADING - 1 + prefixWidth;
    return new Point(x, 0);
  }
}

private Font getFont(Graphics g, int size)
{
  Font font = new Font(DEFAULT_FONT_NAME, Font.BOLD, size);
  if (font != null)
    return font;
  return g.getFont();
}
  

public static void fillWithString(Graphics g, String theText, double sizeFactor) {
  int theHeight = g.getClipBounds().height;
  int theWidth = g.getClipBounds().width;
  Font theFont = g.getFont().deriveFont((float) (theHeight / sizeFactor)).deriveFont(Font.BOLD);
  g.setFont(theFont);
  FontMetrics theMetric = g.getFontMetrics();
  g.drawString(theText, (theWidth - theMetric.stringWidth(theText)) / 2, theMetric.getAscent() + (theHeight - (theMetric.getDescent() + theMetric.getAscent())) / 2);
}

private Font getFont(Graphics g, int size)
{
  Font font = new Font(DEFAULT_FONT_NAME, Font.PLAIN, size);
  if (font != null)
    return font;
  return g.getFont();
}
  

private void calculateYAxisDimensions(Graphics g) {
  FontMetrics fm = g.getFontMetrics(g.getFont());
  int axisWidth = getYLabelsMaxWidth(fm) + spacing * 3 + fm.getHeight();
  yAxisRect.setBounds(chartRect.x, chartRect.y, axisWidth, chartRect.height);
  if (!isPreview) {
    chartRect.setBounds(chartRect.x + axisWidth, chartRect.y, chartRect.width - axisWidth, chartRect.height);
  } else {
    chartRect.setBounds(chartRect.x + previewInset, chartRect.y, chartRect.width, chartRect.height);
  }
}

private Font getFont(Graphics g, int size)
{
  Font font = new Font(DEFAULT_FONT_NAME, Font.BOLD, size);
  if (font != null)
    return font;
  return g.getFont();
}
  

private void calculateYAxisDimensions(Graphics g) {
  FontMetrics fm = g.getFontMetrics(g.getFont());
  int axisWidth = getYLabelsMaxWidth(fm) + spacing * 3 + fm.getHeight();
  yAxisRect.setBounds(chartRect.x, chartRect.y, axisWidth, chartRect.height);
  if (!isPreview) {
    chartRect.setBounds(chartRect.x + axisWidth, chartRect.y, chartRect.width - axisWidth, chartRect.height);
  } else {
    chartRect.setBounds(chartRect.x + previewInset, chartRect.y, chartRect.width, chartRect.height);
  }
}

private Font getFont(Graphics g, int size)
{
  Font font = new Font(DEFAULT_FONT_NAME, Font.BOLD, size);
  if (font != null)
    return font;
  return g.getFont();
}
  

private final Font getFont()
     {
       Graphics g = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB).getGraphics();
       Font font = new Font(g.getFont().toString(), 0, 12);
       g.dispose();
       return font;
     }

@Override
public void paintIcon(Component c, Graphics g, int x, int y) {
  if (background != null)
    background.paintIcon(c, g, x + backgroundXOffset, y + backgroundYOffset);
  g.setColor(color);
  Font origFont = g.getFont();
  g.setFont(font);
  g.drawString(text, x + textXOffset, y + textYOffset);
  g.setFont(origFont);
}

  @Override
  public void paintBorder(java.awt.Component c, Graphics g, int x, int y,
      int width, int height) {
    g.setColor(COLOR);
    g.fillRect(x, y, width, 20);
    g.setFont(g.getFont().deriveFont(BOLD));
    g.setColor(WHITE);
    g.drawString(text, x + 5, y + 15);
  }
}

  /**
   * Returns a <code>String</code> object representing this 
   *                        <code>DVBGraphics</code> object's value.
   * @return       a string representation of this graphics context.
   * @since MHP 1.0
   */
  public String toString() {    
  return getClass().getName() + "[font=" + getFont() + ",color=" + getColor() + "]";
  }
}

private void criarBuffer()
{
  createBufferStrategy(2);
  buffer = getBufferStrategy();
  if (fonteTexto == null)
  {
    Graphics g = buffer.getDrawGraphics();
    fonteTexto = g.getFont();
    dimensoesFonte = getFontMetrics(fonteTexto);
    g.dispose();
  }
}

public void init(DrawContext ctx) {
  JTextComponent c = ctx.getEditorUI().getComponent();
  gColor = graphics.getColor();
  gFont = graphics.getFont();
  // initialize reference to annotations
  annos = ctx.getEditorUI().getDocument().getAnnotations();
}