Question

My Program overrides public void paint(Graphics g, int x, int y); in order to draw some stings using g.drawString(someString, x+10, y+30);

Now someString can be quite long and thus, it may not fit on one line.

What is the best way to write the text on multiple line.
For instance, in a rectangle (x1, y1, x2, y2)?

Answer 1

Thanks to Epaga’s hint and a couple of examples on the Net (not so obvious to find! I used mainly Break a Line for text layout), I could make a component to display wrapped text. It is incomplete, but at least it shows the intended effect.

class TextContainer extends JPanel {     private int m_width;     private int m_height;     private String m_text;     private AttributedCharacterIterator m_iterator;     private int m_start;     private int m_end;      public TextContainer(String text, int width, int height)     {         m_text = text;         m_width = width;         m_height = height;          AttributedString styledText = new AttributedString(text);         m_iterator = styledText.getIterator();         m_start = m_iterator.getBeginIndex();         m_end = m_iterator.getEndIndex();     }      public String getText()     {         return m_text;     }      public Dimension getPreferredSize()     {         return new Dimension(m_width, m_height);     }      public void paint(Graphics g)     {         super.paintComponent(g);          Graphics2D g2 = (Graphics2D) g;         FontRenderContext frc = g2.getFontRenderContext();          LineBreakMeasurer measurer = new LineBreakMeasurer(m_iterator, frc);         measurer.setPosition(m_start);          float x = 0, y = 0;         while (measurer.getPosition() < m_end)         {             TextLayout layout = measurer.nextLayout(m_width);              y += layout.getAscent();             float dx = layout.isLeftToRight() ?                     0 : m_width - layout.getAdvance();              layout.draw(g2, x + dx, y);             y += layout.getDescent() + layout.getLeading();         }     } } 

Just for fun, I made it fitting a circle (alas, no justification, it seems):

public void paint(Graphics g) {     super.paintComponent(g);      Graphics2D g2 = (Graphics2D) g;     FontRenderContext frc = g2.getFontRenderContext();      LineBreakMeasurer measurer = new LineBreakMeasurer(m_iterator, frc);     measurer.setPosition(m_start);      float y = 0;     while (measurer.getPosition() < m_end)     {         double ix = Math.sqrt((m_width / 2 - y) * y);         float x = m_width / 2.0F - (float) ix;         int width = (int) ix * 2;          TextLayout layout = measurer.nextLayout(width);          y += layout.getAscent();         float dx = layout.isLeftToRight() ?                 0 : width - layout.getAdvance();          layout.draw(g2, x + dx, y);         y += layout.getDescent() + layout.getLeading();     } } 

I am not too sure about dx computation, though.