如下圖所示,在JPanel(500X500)上繪制了AttributedString.

該AttributedString的FontMetrics.getStringBounds()的寬度為164.0,如跟蹤輸出所示.

java.awt.geom.Rectangle2D$Float[x=0.0,y=-12.064453,w=164.0,h=15.09375]

但是,圖片建議寬度應為300-400(因為面板的寬度為500).

您能否評論原因和解決方法？

MyJFrame.java

import javax.swing.*;

import java.awt.*;

import java.awt.font.TextAttribute;

import java.text.AttributedString;

class MyJPanel extends JPanel {

MyJPanel() {

setPreferredSize(new Dimension(500,500));

}

@Override

public void paintComponent(Graphics gold) {

super.paintComponent(gold);

Graphics2D g = (Graphics2D)gold;

//

AttributedString text = new AttributedString("Bunny rabits and flying ponies");

text.addAttribute(TextAttribute.FONT, new Font("Arial", Font.BOLD, 24), 0, "Bunny rabits".length());

text.addAttribute(TextAttribute.FOREGROUND, Color.RED, 0, "Bunny rabits".length());

text.addAttribute(TextAttribute.FONT, new Font("Arial", Font.BOLD & Font.ITALIC, 32), 17, 17 + "flying ponies".length());

text.addAttribute(TextAttribute.FOREGROUND, Color.BLUE, 17, 17 + "flying ponies".length());

FontMetrics fm = g.getFontMetrics();

System.out.println(fm.getStringBounds(text.getIterator(), 0, text.getIterator().getEndIndex(), g));

g.drawString(text.getIterator(), 50, 50);

//

g.dispose();

}

}

public class MyJFrame extends JFrame {

public static void main(String[] args) {

MyJFrame frame = new MyJFrame();

frame.setContentPane(new MyJPanel());

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.pack();

frame.setVisible(true);

}

}

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