Problems with newline in Graphics2D.drawString

g2 is an instance of the class Graphics2D. I'd like to be able to draw multi-line text, but that requires a newline character. The following code renders in one line.

String newline = System.getProperty("line.separator");
g2.drawString("part1\r\n" + newline + "part2", x, y);

The drawString method does not handle new-lines.

You'll have to split the string on new-line characters yourself and draw the lines one by one with a proper vertical offset:

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

---

Here is a complete example to give you the idea:

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);
    }
}

which gives the following result:

I just made a method to draw long text spliting automaticaly by giving the line width.

public static void drawStringMultiLine(Graphics2D g, String text, int lineWidth, int x, int y) {
	FontMetrics m = g.getFontMetrics();
	if(m.stringWidth(text) < lineWidth) {
		g.drawString(text, x, y);
	} else {
		String[] words = text.split(" ");
		String currentLine = words[0];
		for(int i = 1; i < words.length; i++) {
			if(m.stringWidth(currentLine+words[i]) < lineWidth) {
				currentLine += " "+words[i];
			} else {
				g.drawString(currentLine, x, y);
				y += m.getHeight();
				currentLine = words[i];
			}
		}
		if(currentLine.trim().length() > 0) {
			g.drawString(currentLine, x, y);
		}
	}
}

Here's a snippet I used to draw text in a JPanel with tab expansion and multiple lines:

import javax.swing.*;
import java.awt.*;
import java.awt.geom.Rectangle2D;

public class Scratch {
    public static void main(String argv[]) {
        JFrame frame = new JFrame("FrameDemo");

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel() {
            @Override
            public void paint(Graphics graphics) {
                graphics.drawRect(100, 100, 1, 1);
                String message =
                        "abc\tdef\n" +
                        "abcx\tdef\tghi\n" +
                        "xxxxxxxxdef\n" +
                        "xxxxxxxxxxxxxxxxghi\n";
                int x = 100;
                int y = 100;
                FontMetrics fontMetrics = graphics.getFontMetrics();
                Rectangle2D tabBounds = fontMetrics.getStringBounds(
                        "xxxxxxxx",
                        graphics);
                int tabWidth = (int)tabBounds.getWidth();
                String[] lines = message.split("\n");
                for (String line : lines) {
                    int xColumn = x;
                    String[] columns = line.split("\t");
                    for (String column : columns) {
                        if (xColumn != x) {
                            // Align to tab stop.
                            xColumn += tabWidth - (xColumn-x) % tabWidth;
                        }
                        Rectangle2D columnBounds = fontMetrics.getStringBounds(
                                column,
                                graphics);
                        graphics.drawString(
                                column,
                                xColumn,
                                y + fontMetrics.getAscent());
                        xColumn += columnBounds.getWidth();
                    }
                    y += fontMetrics.getHeight();
                }
            }

            @Override
            public Dimension getPreferredSize() {
                return new Dimension(400, 200);
            }
        };
        frame.getContentPane().add(panel, BorderLayout.CENTER);

        frame.pack();

        frame.setVisible(true);    }
}

It really seemed like Utilities.drawTabbedText() was promising, but I couldn't figure out what it needed as input.